Towards sustainable agriculture with carbon sequestration, and greenhouse gas mitigation using algal biochar
Chemosphere. 2021 Feb 10;275:129856. doi: 10.1016/j.chemosphere.2021.129856. Online ahead of print.ABSTRACTWith the increase in the world's population, demand for food and other products is continuously rising. This has put a lot of pressure on the agricultural sector. To fulfill these demands, the utilization of chemical fertilizers and pesticides has also increased. Consequently, to overcome the adverse effects of agrochemicals on our environment and health, there has been a shift towards organic fertilizers or other substitutes, which are ecofriendly and help to maintain a sustainable environment. Microalgae have a very...
Source: Chemosphere - February 26, 2021 Category: Chemistry Authors: Sharma Mona Sandeep K Malyan Neha Saini Bansal Deepak Arivalagan Pugazhendhi Smita S Kumar Source Type: research

Biogas-based production of glycogen by Nostoc muscorum: Assessing the potential of transforming CO < sub > 2 < /sub > into value added products
Chemosphere. 2021 Feb 5;275:129885. doi: 10.1016/j.chemosphere.2021.129885. Online ahead of print.ABSTRACTThe potential of the filamentous N2-fixing cyanobacterium Nostoc muscorum for CO2 capture from high-loaded streams (i.e. flue gas or biogas) combined with the accumulation of glycogen (GL) and polyhydroxybutyrate (PHB), was evaluated under nutrient-sufficient and nutrient-limited conditions. N. muscorum was able to grow under CO2 contents from 0.03 up to 30% v/v, thus tolerating CO2 concentrations similar to those found in raw biogas or flue-gas, with maximum CO2-fixation rates of 191.9 ± 46 g m-3 d-1 at a bioma...
Source: Chemosphere - February 26, 2021 Category: Chemistry Authors: Roxana Ángeles Esther Arnaiz Julia Guti érrez Ra úl Muñoz Raquel Lebrero Source Type: research

Modeling of the attached and suspended biomass fractions in a moving bed biofilm reactor
The objective was to evaluate whether a calibrated/validated model could accurately predict experimental results. Initially, a sensitivity analysis was performed to determine influential parameters. The calibration/validation of influential parameters was then conducted via steady-state simulations for two base cases: 1) highest HRT; and 2) lowest HRT. Both sets of calibrated/validated parameters were substantiated using: 1) steady-state simulations at the other HRTs; and 2) dynamic simulations to evaluate the kinetic rates of attached and suspended biomass fractions at all HRTs. Results demonstrated that the model could b...
Source: Chemosphere - February 26, 2021 Category: Chemistry Authors: Alessandro di Biase Maciej S Kowalski Tanner R Devlin Jan A Oleszkiewicz Source Type: research

Towards sustainable agriculture with carbon sequestration, and greenhouse gas mitigation using algal biochar
Chemosphere. 2021 Feb 10;275:129856. doi: 10.1016/j.chemosphere.2021.129856. Online ahead of print.ABSTRACTWith the increase in the world's population, demand for food and other products is continuously rising. This has put a lot of pressure on the agricultural sector. To fulfill these demands, the utilization of chemical fertilizers and pesticides has also increased. Consequently, to overcome the adverse effects of agrochemicals on our environment and health, there has been a shift towards organic fertilizers or other substitutes, which are ecofriendly and help to maintain a sustainable environment. Microalgae have a very...
Source: Chemosphere - February 26, 2021 Category: Chemistry Authors: Sharma Mona Sandeep K Malyan Neha Saini Bansal Deepak Arivalagan Pugazhendhi Smita S Kumar Source Type: research

Biogas-based production of glycogen by Nostoc muscorum: Assessing the potential of transforming CO < sub > 2 < /sub > into value added products
Chemosphere. 2021 Feb 5;275:129885. doi: 10.1016/j.chemosphere.2021.129885. Online ahead of print.ABSTRACTThe potential of the filamentous N2-fixing cyanobacterium Nostoc muscorum for CO2 capture from high-loaded streams (i.e. flue gas or biogas) combined with the accumulation of glycogen (GL) and polyhydroxybutyrate (PHB), was evaluated under nutrient-sufficient and nutrient-limited conditions. N. muscorum was able to grow under CO2 contents from 0.03 up to 30% v/v, thus tolerating CO2 concentrations similar to those found in raw biogas or flue-gas, with maximum CO2-fixation rates of 191.9 ± 46 g m-3 d-1 at a bioma...
Source: Chemosphere - February 26, 2021 Category: Chemistry Authors: Roxana Ángeles Esther Arnaiz Julia Guti érrez Ra úl Muñoz Raquel Lebrero Source Type: research

Modeling of the attached and suspended biomass fractions in a moving bed biofilm reactor
The objective was to evaluate whether a calibrated/validated model could accurately predict experimental results. Initially, a sensitivity analysis was performed to determine influential parameters. The calibration/validation of influential parameters was then conducted via steady-state simulations for two base cases: 1) highest HRT; and 2) lowest HRT. Both sets of calibrated/validated parameters were substantiated using: 1) steady-state simulations at the other HRTs; and 2) dynamic simulations to evaluate the kinetic rates of attached and suspended biomass fractions at all HRTs. Results demonstrated that the model could b...
Source: Chemosphere - February 26, 2021 Category: Chemistry Authors: Alessandro di Biase Maciej S Kowalski Tanner R Devlin Jan A Oleszkiewicz Source Type: research

Soil aggregate-associated mercury (Hg) and organic carbon distribution and microbial community characteristics under typical farmland-use types
Chemosphere. 2021 Feb 15;275:129987. doi: 10.1016/j.chemosphere.2021.129987. Online ahead of print.ABSTRACTIn order to get insight into the distribution characteristics of mercury (Hg) and organic carbon in soil aggregates, and the diversity and composition of soil microbial community under different farmland-use types (soil form three adjacent cultivation systems, i.e., corn, vegetable, and rice fields, named as CFS, VFS, and RFS), a field investigation close to Wanshan Hg mining area was conducted. Results indicated that soil total Hg (0-20 cm) presented in decreasing order of RFS (5.27 mg kg-1)> VFS (4.32 mg kg-1)>...
Source: Chemosphere - February 25, 2021 Category: Chemistry Authors: Penggang Pei Tao Sun Yingming Xu Yuebing Sun Source Type: research

Short-chain fatty acids resource recovery potential from algal sludge via anaerobic fermentation under various pH values
This study investigates the fatty acid production potential from algal sludge via anaerobic fermentation under different pH values. The results indicated that the recovery of short-chain fatty acids (SCFAs) was the highest (3269.25 ± 32.89 mg·COD/L) at pH 11 after 7 days of fermentation. The SCFAs concentration at pH value 11 was 6.24, 1.27, 4.90, and 0.53 times higher compared with that at pH value 3, 5, 7, and 9, respectively. The SCFAs production was continually increased from day 1 to day 7 at pH value 7, 9, and 11. Much fewer middle- and long-chain fatty acids were produced compared with SCFAs. Gross. fa...
Source: Chemosphere - February 25, 2021 Category: Chemistry Authors: Lu Li Zhouyang Li Kang Song Yilu Gu Xiaofeng Gao Xiaoli Zhao Source Type: research

Remediation of emerging environmental pollutants: A review based on advances in the uses of eco-friendly biofabricated nanomaterials
Chemosphere. 2021 Feb 15;275:129975. doi: 10.1016/j.chemosphere.2021.129975. Online ahead of print.ABSTRACTThe increased environmental pollutants due to anthropogenic activities are posing an adverse effects and threat on various biotic forms on the planet. Heavy metals and certain organic pollutants by their toxic persistence in the environment are regarded as significant pollutants worldwide. In recent years, pollutants exist in various forms in the environment are difficult to eliminate by traditional technologies due to various drawbacks. This has lead to shifting of research for the development of cost-effective and e...
Source: Chemosphere - February 25, 2021 Category: Chemistry Authors: Gurulingaiah Bhavya Seema Anil Belorkar Raja Mythili Nagaraja Geetha Huntrike Shekar Shetty Shashikant S Udikeri Sudisha Jogaiah Source Type: research

Soil aggregate-associated mercury (Hg) and organic carbon distribution and microbial community characteristics under typical farmland-use types
Chemosphere. 2021 Feb 15;275:129987. doi: 10.1016/j.chemosphere.2021.129987. Online ahead of print.ABSTRACTIn order to get insight into the distribution characteristics of mercury (Hg) and organic carbon in soil aggregates, and the diversity and composition of soil microbial community under different farmland-use types (soil form three adjacent cultivation systems, i.e., corn, vegetable, and rice fields, named as CFS, VFS, and RFS), a field investigation close to Wanshan Hg mining area was conducted. Results indicated that soil total Hg (0-20 cm) presented in decreasing order of RFS (5.27 mg kg-1)> VFS (4.32 mg kg-1)>...
Source: Chemosphere - February 25, 2021 Category: Chemistry Authors: Penggang Pei Tao Sun Yingming Xu Yuebing Sun Source Type: research

Short-chain fatty acids resource recovery potential from algal sludge via anaerobic fermentation under various pH values
This study investigates the fatty acid production potential from algal sludge via anaerobic fermentation under different pH values. The results indicated that the recovery of short-chain fatty acids (SCFAs) was the highest (3269.25 ± 32.89 mg·COD/L) at pH 11 after 7 days of fermentation. The SCFAs concentration at pH value 11 was 6.24, 1.27, 4.90, and 0.53 times higher compared with that at pH value 3, 5, 7, and 9, respectively. The SCFAs production was continually increased from day 1 to day 7 at pH value 7, 9, and 11. Much fewer middle- and long-chain fatty acids were produced compared with SCFAs. Gross. fa...
Source: Chemosphere - February 25, 2021 Category: Chemistry Authors: Lu Li Zhouyang Li Kang Song Yilu Gu Xiaofeng Gao Xiaoli Zhao Source Type: research

Remediation of emerging environmental pollutants: A review based on advances in the uses of eco-friendly biofabricated nanomaterials
Chemosphere. 2021 Feb 15;275:129975. doi: 10.1016/j.chemosphere.2021.129975. Online ahead of print.ABSTRACTThe increased environmental pollutants due to anthropogenic activities are posing an adverse effects and threat on various biotic forms on the planet. Heavy metals and certain organic pollutants by their toxic persistence in the environment are regarded as significant pollutants worldwide. In recent years, pollutants exist in various forms in the environment are difficult to eliminate by traditional technologies due to various drawbacks. This has lead to shifting of research for the development of cost-effective and e...
Source: Chemosphere - February 25, 2021 Category: Chemistry Authors: Gurulingaiah Bhavya Seema Anil Belorkar Raja Mythili Nagaraja Geetha Huntrike Shekar Shetty Shashikant S Udikeri Sudisha Jogaiah Source Type: research

Soil aggregate-associated mercury (Hg) and organic carbon distribution and microbial community characteristics under typical farmland-use types
Chemosphere. 2021 Feb 15;275:129987. doi: 10.1016/j.chemosphere.2021.129987. Online ahead of print.ABSTRACTIn order to get insight into the distribution characteristics of mercury (Hg) and organic carbon in soil aggregates, and the diversity and composition of soil microbial community under different farmland-use types (soil form three adjacent cultivation systems, i.e., corn, vegetable, and rice fields, named as CFS, VFS, and RFS), a field investigation close to Wanshan Hg mining area was conducted. Results indicated that soil total Hg (0-20 cm) presented in decreasing order of RFS (5.27 mg kg-1)> VFS (4.32 mg kg-1)>...
Source: Chemosphere - February 25, 2021 Category: Chemistry Authors: Penggang Pei Tao Sun Yingming Xu Yuebing Sun Source Type: research

Short-chain fatty acids resource recovery potential from algal sludge via anaerobic fermentation under various pH values
This study investigates the fatty acid production potential from algal sludge via anaerobic fermentation under different pH values. The results indicated that the recovery of short-chain fatty acids (SCFAs) was the highest (3269.25 ± 32.89 mg·COD/L) at pH 11 after 7 days of fermentation. The SCFAs concentration at pH value 11 was 6.24, 1.27, 4.90, and 0.53 times higher compared with that at pH value 3, 5, 7, and 9, respectively. The SCFAs production was continually increased from day 1 to day 7 at pH value 7, 9, and 11. Much fewer middle- and long-chain fatty acids were produced compared with SCFAs. Gross. fa...
Source: Chemosphere - February 25, 2021 Category: Chemistry Authors: Lu Li Zhouyang Li Kang Song Yilu Gu Xiaofeng Gao Xiaoli Zhao Source Type: research

Remediation of emerging environmental pollutants: A review based on advances in the uses of eco-friendly biofabricated nanomaterials
Chemosphere. 2021 Feb 15;275:129975. doi: 10.1016/j.chemosphere.2021.129975. Online ahead of print.ABSTRACTThe increased environmental pollutants due to anthropogenic activities are posing an adverse effects and threat on various biotic forms on the planet. Heavy metals and certain organic pollutants by their toxic persistence in the environment are regarded as significant pollutants worldwide. In recent years, pollutants exist in various forms in the environment are difficult to eliminate by traditional technologies due to various drawbacks. This has lead to shifting of research for the development of cost-effective and e...
Source: Chemosphere - February 25, 2021 Category: Chemistry Authors: Gurulingaiah Bhavya Seema Anil Belorkar Raja Mythili Nagaraja Geetha Huntrike Shekar Shetty Shashikant S Udikeri Sudisha Jogaiah Source Type: research

Effects of cations on biofilm formation and characteristics in integrated fixed film activated sludge process at different carbon and nitrogen loadings
In this study, the effects of cations indicated as the monovalent to divalent cations (M/D) ratio on the biofilm formation and characteristics, and on the IFAS performances for carbon and ammonium removals were evaluated. The experiments were conducted in three IFAS systems feeding with the same wastewater but different M/D ratios and two carbon and nitrogen loadings. The findings revealed that high monovalent with low divalent cations at the M/D ratios higher than 2.0 produced excessive polysaccharides in EPS resulting in high viscosity of activated sludge flocs causing viscous bulking with high SVI values, decreasing the...
Source: Chemosphere - February 24, 2021 Category: Chemistry Authors: Tongchai Sriwiriyarat Sinchai Kuhakaew Source Type: research

Effects of cations on biofilm formation and characteristics in integrated fixed film activated sludge process at different carbon and nitrogen loadings
In this study, the effects of cations indicated as the monovalent to divalent cations (M/D) ratio on the biofilm formation and characteristics, and on the IFAS performances for carbon and ammonium removals were evaluated. The experiments were conducted in three IFAS systems feeding with the same wastewater but different M/D ratios and two carbon and nitrogen loadings. The findings revealed that high monovalent with low divalent cations at the M/D ratios higher than 2.0 produced excessive polysaccharides in EPS resulting in high viscosity of activated sludge flocs causing viscous bulking with high SVI values, decreasing the...
Source: Chemosphere - February 24, 2021 Category: Chemistry Authors: Tongchai Sriwiriyarat Sinchai Kuhakaew Source Type: research

Effects of cations on biofilm formation and characteristics in integrated fixed film activated sludge process at different carbon and nitrogen loadings
In this study, the effects of cations indicated as the monovalent to divalent cations (M/D) ratio on the biofilm formation and characteristics, and on the IFAS performances for carbon and ammonium removals were evaluated. The experiments were conducted in three IFAS systems feeding with the same wastewater but different M/D ratios and two carbon and nitrogen loadings. The findings revealed that high monovalent with low divalent cations at the M/D ratios higher than 2.0 produced excessive polysaccharides in EPS resulting in high viscosity of activated sludge flocs causing viscous bulking with high SVI values, decreasing the...
Source: Chemosphere - February 24, 2021 Category: Chemistry Authors: Tongchai Sriwiriyarat Sinchai Kuhakaew Source Type: research

Lower-than-standard particulate matter air pollution reduced life expectancy in Hong Kong: A time-series analysis of 8.5 million years of life lost
This study aimed to investigate mortality burden and life expectancy loss due to lower-than-standard particulate matter air pollution in Hong Kong, China.METHODS: We obtained 17-year (2000-2016) daily time-series data on mortality, particulate matters with aerodynamic diameters
Source: Chemosphere - February 19, 2021 Category: Chemistry Authors: Jian Cheng Hung Chak Ho Chris Webster Hong Su Haifeng Pan Hao Zheng Zhiwei Xu Source Type: research

Time series of atmospheric Δ < sup > 14 < /sup > CO < sub > 2 < /sub > recorded in tree rings from Northwest China (1957-2015)
Chemosphere. 2021 Feb 10;272:129921. doi: 10.1016/j.chemosphere.2021.129921. Online ahead of print.ABSTRACTRadiocarbon (14C) is a unique and important tool for understanding carbon cycle in the nature, and its use can be significantly enhanced where reliable historical atmospheric Δ14CO2 records can be established. In China, continuous atmospheric Δ14CO2 records since the 1950s are scarce, a period when dramatic variations of Δ14CO2 occurred caused by intensive human activities. In this research, Δ14C of Qinghai spruce tree rings collected from Huangzhong (HZ) (36.27°N, 101.67°E, 2982 m amsl...
Source: Chemosphere - February 19, 2021 Category: Chemistry Authors: Xiaohu Xiong Weijian Zhou Xiaolin Hou Peng Cheng Hua Du Xue Zhao Shugang Wu Yaoyao Hou Xuefeng Lu Yunchong Fu Source Type: research

Tuning the reactivity of tri-s-triazine, trinitro-tri-s-triazine and ternary tri-s-triazine graphitic C < sub > 3 < /sub > N < sub > 4 < /sub > quantum dots through H-functionalized and B-doped complexes: A density functional study
Chemosphere. 2021 Feb 8;272:129901. doi: 10.1016/j.chemosphere.2021.129901. Online ahead of print.ABSTRACTModifying the structures and doping are proven to be effective methods to tune the structural and electrical properties of g-C3N4 quantum dots. Hence, in this study, tri-s-triazine and tri-nitro tri-s-triazine have been studied by functionalizing their edges with hydrogen. The H-functionalized tri-nitro tri-s-triazine quantum dot displays a buckled structure with a band gap of 1.988 eV, whereas the tri-s-triazine demonstrates a planner structure with a band gap of 1.636 eV. The obtained results have been compared with ...
Source: Chemosphere - February 19, 2021 Category: Chemistry Authors: D Ravichandran R Akilan S Vinnarasi R Shankar S K Khadheer Pasha Sivakumar Manickam Source Type: research

Diversity and structure of microbial biofilms on microplastics in riverine waters of the Pearl River Delta, China
This study aimed to characterize the microbial biofilms colonizing MPs in the riverine water of the Pearl River Delta, China, and identify the seasonal, geographical and environmental influences on MP-associated communities. We sampled MPs and the surrounding surface water from eight outlets in three seasons and analyzed their microbial communities by Illumina sequencing of the 16S rRNA gene libraries. Across all sampling seasons and locations, abundant MP-colonizing taxa belonged to the phylum Proteobacteria, which suggested initial biofilm development on those MPs. The structure and composition of MP-attached microbial c...
Source: Chemosphere - February 19, 2021 Category: Chemistry Authors: Guiqin Yang Mengting Gong Lei Mai Li Zhuang Eddy Y Zeng Source Type: research

Depletion kinetics and concentration- and time-dependent toxicity of a tertiary mixture of amitraz and its major hydrolysis products in honeybees
Chemosphere. 2021 Feb 10;272:129923. doi: 10.1016/j.chemosphere.2021.129923. Online ahead of print.ABSTRACTAlthough amitraz is one of the acaricides most commonly applied within beehives, to date, its time-dependent oral toxicity in honeybees has not been investigated, due to amitraz's instability in aqueous media. In aqueous media such as honey, amitraz rapidly forms a continuously changing tertiary mixture with two of its major hydrolysis products, DMF and DMPF. The contribution of each hydrolysis product to the overall oral toxicity of this acaricide is not known. Therefore, we aimed to characterize the depletion and fo...
Source: Chemosphere - February 19, 2021 Category: Chemistry Authors: Vijayakumar Bommuraj Matan Birenboim Yaira Chen Shimon Barel Jakob A Shimshoni Source Type: research

Comparative study of As (V) uptake in aqueous medium by a polymer inclusion membrane-based passive sampling device and two filamentous fungi (Aspergillus niger and Rhizopus sp.)
Chemosphere. 2021 Feb 10;272:129920. doi: 10.1016/j.chemosphere.2021.129920. Online ahead of print.ABSTRACTIn this work a polymer inclusion membrane (PIM) is proposed as passive sampler material and compared with two filamentous fungi for As (V) uptake to evaluate its ability as chemical surrogate material for the monitoring of this metalloid in aquatic environments. Results show excellent passive sampling characteristics of the device since a linear uptake profile as a function of time was observed. The correlation coefficients between the PIM passive sampler with Aspergillus niger (r = 0.83) and Rhizopus sp. (r = 0.13) u...
Source: Chemosphere - February 19, 2021 Category: Chemistry Authors: Yahs é Rojas-Challa Josefina de Gyves Raquel Ortega-Mu ñoz Fernando Montiel-Aguirre Ren é González-Albarrán Eduardo Rodr íguez de San Miguel Source Type: research

Application of potassium ferrate combined with poly-aluminum chloride for mitigating ultrafiltration (UF) membrane fouling in secondary effluent: Comparison of oxidant dosing strategies
Chemosphere. 2021 Feb 8;274:129862. doi: 10.1016/j.chemosphere.2021.129862. Online ahead of print.ABSTRACTCoagulation has been widely applied as a pretreatment for ultrafiltration (UF) membrane in wastewater reclamation, however, it is unable to effectively ensure the removal of organic micropollutants (OMPs) and genotoxicity. To solve this problem, oxidant ferrate (VI) (FeVIO42-, FeVI) was combined with coagulant poly-aluminum chloride (PAC) as the pretreatment of UF to treat secondary effluent, and three oxidant dosing strategies (namely oxidation followed by coagulation (O-FeVI-PAC), simultaneous oxidation and coagulati...
Source: Chemosphere - February 19, 2021 Category: Chemistry Authors: Zhiqiang Chen Boxuan Yang Qinxue Wen Yingcai Tang Source Type: research

First screening of biocides, persistent organic pollutants, pharmaceutical and personal care products in Antarctic phytoplankton from Deception Island by FT-ICR-MS
Chemosphere. 2021 Feb 13;274:129860. doi: 10.1016/j.chemosphere.2021.129860. Online ahead of print.ABSTRACTIn recent years, the Antarctic territory has seen a rise in the number of tourists and scientists. This has led to an increase in the anthropogenic footprint in Antarctic ecosystems, namely in terms of emerging contaminants, such as Biocides, Persistent Organic Pollutants (POPs) as well as Pharmaceutical and Personal Care Products (PPCPs). Yet scarce information on the presence of these emerging contaminants is available for trophic compartments, especially the phytoplankton community. Using high resolution Fourier-tr...
Source: Chemosphere - February 19, 2021 Category: Chemistry Authors: Bernardo Duarte Carla Gameiro Ana Rita Matos Andreia Figueiredo Marta Sousa Silva Carlos Cordeiro Isabel Ca çador Patrick Reis-Santos Vanessa Fonseca Maria Teresa Cabrita Source Type: research

Lower-than-standard particulate matter air pollution reduced life expectancy in Hong Kong: A time-series analysis of 8.5 million years of life lost
This study aimed to investigate mortality burden and life expectancy loss due to lower-than-standard particulate matter air pollution in Hong Kong, China.METHODS: We obtained 17-year (2000-2016) daily time-series data on mortality, particulate matters with aerodynamic diameters
Source: Chemosphere - February 19, 2021 Category: Chemistry Authors: Jian Cheng Hung Chak Ho Chris Webster Hong Su Haifeng Pan Hao Zheng Zhiwei Xu Source Type: research

Time series of atmospheric Δ < sup > 14 < /sup > CO < sub > 2 < /sub > recorded in tree rings from Northwest China (1957-2015)
Chemosphere. 2021 Feb 10;272:129921. doi: 10.1016/j.chemosphere.2021.129921. Online ahead of print.ABSTRACTRadiocarbon (14C) is a unique and important tool for understanding carbon cycle in the nature, and its use can be significantly enhanced where reliable historical atmospheric Δ14CO2 records can be established. In China, continuous atmospheric Δ14CO2 records since the 1950s are scarce, a period when dramatic variations of Δ14CO2 occurred caused by intensive human activities. In this research, Δ14C of Qinghai spruce tree rings collected from Huangzhong (HZ) (36.27°N, 101.67°E, 2982 m amsl...
Source: Chemosphere - February 19, 2021 Category: Chemistry Authors: Xiaohu Xiong Weijian Zhou Xiaolin Hou Peng Cheng Hua Du Xue Zhao Shugang Wu Yaoyao Hou Xuefeng Lu Yunchong Fu Source Type: research

Tuning the reactivity of tri-s-triazine, trinitro-tri-s-triazine and ternary tri-s-triazine graphitic C < sub > 3 < /sub > N < sub > 4 < /sub > quantum dots through H-functionalized and B-doped complexes: A density functional study
Chemosphere. 2021 Feb 8;272:129901. doi: 10.1016/j.chemosphere.2021.129901. Online ahead of print.ABSTRACTModifying the structures and doping are proven to be effective methods to tune the structural and electrical properties of g-C3N4 quantum dots. Hence, in this study, tri-s-triazine and tri-nitro tri-s-triazine have been studied by functionalizing their edges with hydrogen. The H-functionalized tri-nitro tri-s-triazine quantum dot displays a buckled structure with a band gap of 1.988 eV, whereas the tri-s-triazine demonstrates a planner structure with a band gap of 1.636 eV. The obtained results have been compared with ...
Source: Chemosphere - February 19, 2021 Category: Chemistry Authors: D Ravichandran R Akilan S Vinnarasi R Shankar S K Khadheer Pasha Sivakumar Manickam Source Type: research

Diversity and structure of microbial biofilms on microplastics in riverine waters of the Pearl River Delta, China
This study aimed to characterize the microbial biofilms colonizing MPs in the riverine water of the Pearl River Delta, China, and identify the seasonal, geographical and environmental influences on MP-associated communities. We sampled MPs and the surrounding surface water from eight outlets in three seasons and analyzed their microbial communities by Illumina sequencing of the 16S rRNA gene libraries. Across all sampling seasons and locations, abundant MP-colonizing taxa belonged to the phylum Proteobacteria, which suggested initial biofilm development on those MPs. The structure and composition of MP-attached microbial c...
Source: Chemosphere - February 19, 2021 Category: Chemistry Authors: Guiqin Yang Mengting Gong Lei Mai Li Zhuang Eddy Y Zeng Source Type: research

Depletion kinetics and concentration- and time-dependent toxicity of a tertiary mixture of amitraz and its major hydrolysis products in honeybees
Chemosphere. 2021 Feb 10;272:129923. doi: 10.1016/j.chemosphere.2021.129923. Online ahead of print.ABSTRACTAlthough amitraz is one of the acaricides most commonly applied within beehives, to date, its time-dependent oral toxicity in honeybees has not been investigated, due to amitraz's instability in aqueous media. In aqueous media such as honey, amitraz rapidly forms a continuously changing tertiary mixture with two of its major hydrolysis products, DMF and DMPF. The contribution of each hydrolysis product to the overall oral toxicity of this acaricide is not known. Therefore, we aimed to characterize the depletion and fo...
Source: Chemosphere - February 19, 2021 Category: Chemistry Authors: Vijayakumar Bommuraj Matan Birenboim Yaira Chen Shimon Barel Jakob A Shimshoni Source Type: research

Comparative study of As (V) uptake in aqueous medium by a polymer inclusion membrane-based passive sampling device and two filamentous fungi (Aspergillus niger and Rhizopus sp.)
Chemosphere. 2021 Feb 10;272:129920. doi: 10.1016/j.chemosphere.2021.129920. Online ahead of print.ABSTRACTIn this work a polymer inclusion membrane (PIM) is proposed as passive sampler material and compared with two filamentous fungi for As (V) uptake to evaluate its ability as chemical surrogate material for the monitoring of this metalloid in aquatic environments. Results show excellent passive sampling characteristics of the device since a linear uptake profile as a function of time was observed. The correlation coefficients between the PIM passive sampler with Aspergillus niger (r = 0.83) and Rhizopus sp. (r = 0.13) u...
Source: Chemosphere - February 19, 2021 Category: Chemistry Authors: Yahs é Rojas-Challa Josefina de Gyves Raquel Ortega-Mu ñoz Fernando Montiel-Aguirre Ren é González-Albarrán Eduardo Rodr íguez de San Miguel Source Type: research

Application of potassium ferrate combined with poly-aluminum chloride for mitigating ultrafiltration (UF) membrane fouling in secondary effluent: Comparison of oxidant dosing strategies
Chemosphere. 2021 Feb 8;274:129862. doi: 10.1016/j.chemosphere.2021.129862. Online ahead of print.ABSTRACTCoagulation has been widely applied as a pretreatment for ultrafiltration (UF) membrane in wastewater reclamation, however, it is unable to effectively ensure the removal of organic micropollutants (OMPs) and genotoxicity. To solve this problem, oxidant ferrate (VI) (FeVIO42-, FeVI) was combined with coagulant poly-aluminum chloride (PAC) as the pretreatment of UF to treat secondary effluent, and three oxidant dosing strategies (namely oxidation followed by coagulation (O-FeVI-PAC), simultaneous oxidation and coagulati...
Source: Chemosphere - February 19, 2021 Category: Chemistry Authors: Zhiqiang Chen Boxuan Yang Qinxue Wen Yingcai Tang Source Type: research

First screening of biocides, persistent organic pollutants, pharmaceutical and personal care products in Antarctic phytoplankton from Deception Island by FT-ICR-MS
Chemosphere. 2021 Feb 13;274:129860. doi: 10.1016/j.chemosphere.2021.129860. Online ahead of print.ABSTRACTIn recent years, the Antarctic territory has seen a rise in the number of tourists and scientists. This has led to an increase in the anthropogenic footprint in Antarctic ecosystems, namely in terms of emerging contaminants, such as Biocides, Persistent Organic Pollutants (POPs) as well as Pharmaceutical and Personal Care Products (PPCPs). Yet scarce information on the presence of these emerging contaminants is available for trophic compartments, especially the phytoplankton community. Using high resolution Fourier-tr...
Source: Chemosphere - February 19, 2021 Category: Chemistry Authors: Bernardo Duarte Carla Gameiro Ana Rita Matos Andreia Figueiredo Marta Sousa Silva Carlos Cordeiro Isabel Ca çador Patrick Reis-Santos Vanessa Fonseca Maria Teresa Cabrita Source Type: research

Lower-than-standard particulate matter air pollution reduced life expectancy in Hong Kong: A time-series analysis of 8.5 million years of life lost
This study aimed to investigate mortality burden and life expectancy loss due to lower-than-standard particulate matter air pollution in Hong Kong, China.METHODS: We obtained 17-year (2000-2016) daily time-series data on mortality, particulate matters with aerodynamic diameters
Source: Chemosphere - February 19, 2021 Category: Chemistry Authors: Jian Cheng Hung Chak Ho Chris Webster Hong Su Haifeng Pan Hao Zheng Zhiwei Xu Source Type: research

Time series of atmospheric Δ < sup > 14 < /sup > CO < sub > 2 < /sub > recorded in tree rings from Northwest China (1957-2015)
Chemosphere. 2021 Feb 10;272:129921. doi: 10.1016/j.chemosphere.2021.129921. Online ahead of print.ABSTRACTRadiocarbon (14C) is a unique and important tool for understanding carbon cycle in the nature, and its use can be significantly enhanced where reliable historical atmospheric Δ14CO2 records can be established. In China, continuous atmospheric Δ14CO2 records since the 1950s are scarce, a period when dramatic variations of Δ14CO2 occurred caused by intensive human activities. In this research, Δ14C of Qinghai spruce tree rings collected from Huangzhong (HZ) (36.27°N, 101.67°E, 2982 m amsl...
Source: Chemosphere - February 19, 2021 Category: Chemistry Authors: Xiaohu Xiong Weijian Zhou Xiaolin Hou Peng Cheng Hua Du Xue Zhao Shugang Wu Yaoyao Hou Xuefeng Lu Yunchong Fu Source Type: research

Tuning the reactivity of tri-s-triazine, trinitro-tri-s-triazine and ternary tri-s-triazine graphitic C < sub > 3 < /sub > N < sub > 4 < /sub > quantum dots through H-functionalized and B-doped complexes: A density functional study
Chemosphere. 2021 Feb 8;272:129901. doi: 10.1016/j.chemosphere.2021.129901. Online ahead of print.ABSTRACTModifying the structures and doping are proven to be effective methods to tune the structural and electrical properties of g-C3N4 quantum dots. Hence, in this study, tri-s-triazine and tri-nitro tri-s-triazine have been studied by functionalizing their edges with hydrogen. The H-functionalized tri-nitro tri-s-triazine quantum dot displays a buckled structure with a band gap of 1.988 eV, whereas the tri-s-triazine demonstrates a planner structure with a band gap of 1.636 eV. The obtained results have been compared with ...
Source: Chemosphere - February 19, 2021 Category: Chemistry Authors: D Ravichandran R Akilan S Vinnarasi R Shankar S K Khadheer Pasha Sivakumar Manickam Source Type: research

Diversity and structure of microbial biofilms on microplastics in riverine waters of the Pearl River Delta, China
This study aimed to characterize the microbial biofilms colonizing MPs in the riverine water of the Pearl River Delta, China, and identify the seasonal, geographical and environmental influences on MP-associated communities. We sampled MPs and the surrounding surface water from eight outlets in three seasons and analyzed their microbial communities by Illumina sequencing of the 16S rRNA gene libraries. Across all sampling seasons and locations, abundant MP-colonizing taxa belonged to the phylum Proteobacteria, which suggested initial biofilm development on those MPs. The structure and composition of MP-attached microbial c...
Source: Chemosphere - February 19, 2021 Category: Chemistry Authors: Guiqin Yang Mengting Gong Lei Mai Li Zhuang Eddy Y Zeng Source Type: research

Depletion kinetics and concentration- and time-dependent toxicity of a tertiary mixture of amitraz and its major hydrolysis products in honeybees
Chemosphere. 2021 Feb 10;272:129923. doi: 10.1016/j.chemosphere.2021.129923. Online ahead of print.ABSTRACTAlthough amitraz is one of the acaricides most commonly applied within beehives, to date, its time-dependent oral toxicity in honeybees has not been investigated, due to amitraz's instability in aqueous media. In aqueous media such as honey, amitraz rapidly forms a continuously changing tertiary mixture with two of its major hydrolysis products, DMF and DMPF. The contribution of each hydrolysis product to the overall oral toxicity of this acaricide is not known. Therefore, we aimed to characterize the depletion and fo...
Source: Chemosphere - February 19, 2021 Category: Chemistry Authors: Vijayakumar Bommuraj Matan Birenboim Yaira Chen Shimon Barel Jakob A Shimshoni Source Type: research

Comparative study of As (V) uptake in aqueous medium by a polymer inclusion membrane-based passive sampling device and two filamentous fungi (Aspergillus niger and Rhizopus sp.)
Chemosphere. 2021 Feb 10;272:129920. doi: 10.1016/j.chemosphere.2021.129920. Online ahead of print.ABSTRACTIn this work a polymer inclusion membrane (PIM) is proposed as passive sampler material and compared with two filamentous fungi for As (V) uptake to evaluate its ability as chemical surrogate material for the monitoring of this metalloid in aquatic environments. Results show excellent passive sampling characteristics of the device since a linear uptake profile as a function of time was observed. The correlation coefficients between the PIM passive sampler with Aspergillus niger (r = 0.83) and Rhizopus sp. (r = 0.13) u...
Source: Chemosphere - February 19, 2021 Category: Chemistry Authors: Yahs é Rojas-Challa Josefina de Gyves Raquel Ortega-Mu ñoz Fernando Montiel-Aguirre Ren é González-Albarrán Eduardo Rodr íguez de San Miguel Source Type: research

Application of potassium ferrate combined with poly-aluminum chloride for mitigating ultrafiltration (UF) membrane fouling in secondary effluent: Comparison of oxidant dosing strategies
Chemosphere. 2021 Feb 8;274:129862. doi: 10.1016/j.chemosphere.2021.129862. Online ahead of print.ABSTRACTCoagulation has been widely applied as a pretreatment for ultrafiltration (UF) membrane in wastewater reclamation, however, it is unable to effectively ensure the removal of organic micropollutants (OMPs) and genotoxicity. To solve this problem, oxidant ferrate (VI) (FeVIO42-, FeVI) was combined with coagulant poly-aluminum chloride (PAC) as the pretreatment of UF to treat secondary effluent, and three oxidant dosing strategies (namely oxidation followed by coagulation (O-FeVI-PAC), simultaneous oxidation and coagulati...
Source: Chemosphere - February 19, 2021 Category: Chemistry Authors: Zhiqiang Chen Boxuan Yang Qinxue Wen Yingcai Tang Source Type: research

First screening of biocides, persistent organic pollutants, pharmaceutical and personal care products in Antarctic phytoplankton from Deception Island by FT-ICR-MS
Chemosphere. 2021 Feb 13;274:129860. doi: 10.1016/j.chemosphere.2021.129860. Online ahead of print.ABSTRACTIn recent years, the Antarctic territory has seen a rise in the number of tourists and scientists. This has led to an increase in the anthropogenic footprint in Antarctic ecosystems, namely in terms of emerging contaminants, such as Biocides, Persistent Organic Pollutants (POPs) as well as Pharmaceutical and Personal Care Products (PPCPs). Yet scarce information on the presence of these emerging contaminants is available for trophic compartments, especially the phytoplankton community. Using high resolution Fourier-tr...
Source: Chemosphere - February 19, 2021 Category: Chemistry Authors: Bernardo Duarte Carla Gameiro Ana Rita Matos Andreia Figueiredo Marta Sousa Silva Carlos Cordeiro Isabel Ca çador Patrick Reis-Santos Vanessa Fonseca Maria Teresa Cabrita Source Type: research

Lower-than-standard particulate matter air pollution reduced life expectancy in Hong Kong: A time-series analysis of 8.5 million years of life lost
This study aimed to investigate mortality burden and life expectancy loss due to lower-than-standard particulate matter air pollution in Hong Kong, China.METHODS: We obtained 17-year (2000-2016) daily time-series data on mortality, particulate matters with aerodynamic diameters
Source: Chemosphere - February 19, 2021 Category: Chemistry Authors: Jian Cheng Hung Chak Ho Chris Webster Hong Su Haifeng Pan Hao Zheng Zhiwei Xu Source Type: research

Time series of atmospheric Δ < sup > 14 < /sup > CO < sub > 2 < /sub > recorded in tree rings from Northwest China (1957-2015)
Chemosphere. 2021 Feb 10;272:129921. doi: 10.1016/j.chemosphere.2021.129921. Online ahead of print.ABSTRACTRadiocarbon (14C) is a unique and important tool for understanding carbon cycle in the nature, and its use can be significantly enhanced where reliable historical atmospheric Δ14CO2 records can be established. In China, continuous atmospheric Δ14CO2 records since the 1950s are scarce, a period when dramatic variations of Δ14CO2 occurred caused by intensive human activities. In this research, Δ14C of Qinghai spruce tree rings collected from Huangzhong (HZ) (36.27°N, 101.67°E, 2982 m amsl...
Source: Chemosphere - February 19, 2021 Category: Chemistry Authors: Xiaohu Xiong Weijian Zhou Xiaolin Hou Peng Cheng Hua Du Xue Zhao Shugang Wu Yaoyao Hou Xuefeng Lu Yunchong Fu Source Type: research

Tuning the reactivity of tri-s-triazine, trinitro-tri-s-triazine and ternary tri-s-triazine graphitic C < sub > 3 < /sub > N < sub > 4 < /sub > quantum dots through H-functionalized and B-doped complexes: A density functional study
Chemosphere. 2021 Feb 8;272:129901. doi: 10.1016/j.chemosphere.2021.129901. Online ahead of print.ABSTRACTModifying the structures and doping are proven to be effective methods to tune the structural and electrical properties of g-C3N4 quantum dots. Hence, in this study, tri-s-triazine and tri-nitro tri-s-triazine have been studied by functionalizing their edges with hydrogen. The H-functionalized tri-nitro tri-s-triazine quantum dot displays a buckled structure with a band gap of 1.988 eV, whereas the tri-s-triazine demonstrates a planner structure with a band gap of 1.636 eV. The obtained results have been compared with ...
Source: Chemosphere - February 19, 2021 Category: Chemistry Authors: D Ravichandran R Akilan S Vinnarasi R Shankar S K Khadheer Pasha Sivakumar Manickam Source Type: research

Diversity and structure of microbial biofilms on microplastics in riverine waters of the Pearl River Delta, China
This study aimed to characterize the microbial biofilms colonizing MPs in the riverine water of the Pearl River Delta, China, and identify the seasonal, geographical and environmental influences on MP-associated communities. We sampled MPs and the surrounding surface water from eight outlets in three seasons and analyzed their microbial communities by Illumina sequencing of the 16S rRNA gene libraries. Across all sampling seasons and locations, abundant MP-colonizing taxa belonged to the phylum Proteobacteria, which suggested initial biofilm development on those MPs. The structure and composition of MP-attached microbial c...
Source: Chemosphere - February 19, 2021 Category: Chemistry Authors: Guiqin Yang Mengting Gong Lei Mai Li Zhuang Eddy Y Zeng Source Type: research

Depletion kinetics and concentration- and time-dependent toxicity of a tertiary mixture of amitraz and its major hydrolysis products in honeybees
Chemosphere. 2021 Feb 10;272:129923. doi: 10.1016/j.chemosphere.2021.129923. Online ahead of print.ABSTRACTAlthough amitraz is one of the acaricides most commonly applied within beehives, to date, its time-dependent oral toxicity in honeybees has not been investigated, due to amitraz's instability in aqueous media. In aqueous media such as honey, amitraz rapidly forms a continuously changing tertiary mixture with two of its major hydrolysis products, DMF and DMPF. The contribution of each hydrolysis product to the overall oral toxicity of this acaricide is not known. Therefore, we aimed to characterize the depletion and fo...
Source: Chemosphere - February 19, 2021 Category: Chemistry Authors: Vijayakumar Bommuraj Matan Birenboim Yaira Chen Shimon Barel Jakob A Shimshoni Source Type: research

Comparative study of As (V) uptake in aqueous medium by a polymer inclusion membrane-based passive sampling device and two filamentous fungi (Aspergillus niger and Rhizopus sp.)
Chemosphere. 2021 Feb 10;272:129920. doi: 10.1016/j.chemosphere.2021.129920. Online ahead of print.ABSTRACTIn this work a polymer inclusion membrane (PIM) is proposed as passive sampler material and compared with two filamentous fungi for As (V) uptake to evaluate its ability as chemical surrogate material for the monitoring of this metalloid in aquatic environments. Results show excellent passive sampling characteristics of the device since a linear uptake profile as a function of time was observed. The correlation coefficients between the PIM passive sampler with Aspergillus niger (r = 0.83) and Rhizopus sp. (r = 0.13) u...
Source: Chemosphere - February 19, 2021 Category: Chemistry Authors: Yahs é Rojas-Challa Josefina de Gyves Raquel Ortega-Mu ñoz Fernando Montiel-Aguirre Ren é González-Albarrán Eduardo Rodr íguez de San Miguel Source Type: research

Application of potassium ferrate combined with poly-aluminum chloride for mitigating ultrafiltration (UF) membrane fouling in secondary effluent: Comparison of oxidant dosing strategies
Chemosphere. 2021 Feb 8;274:129862. doi: 10.1016/j.chemosphere.2021.129862. Online ahead of print.ABSTRACTCoagulation has been widely applied as a pretreatment for ultrafiltration (UF) membrane in wastewater reclamation, however, it is unable to effectively ensure the removal of organic micropollutants (OMPs) and genotoxicity. To solve this problem, oxidant ferrate (VI) (FeVIO42-, FeVI) was combined with coagulant poly-aluminum chloride (PAC) as the pretreatment of UF to treat secondary effluent, and three oxidant dosing strategies (namely oxidation followed by coagulation (O-FeVI-PAC), simultaneous oxidation and coagulati...
Source: Chemosphere - February 19, 2021 Category: Chemistry Authors: Zhiqiang Chen Boxuan Yang Qinxue Wen Yingcai Tang Source Type: research

First screening of biocides, persistent organic pollutants, pharmaceutical and personal care products in Antarctic phytoplankton from Deception Island by FT-ICR-MS
Chemosphere. 2021 Feb 13;274:129860. doi: 10.1016/j.chemosphere.2021.129860. Online ahead of print.ABSTRACTIn recent years, the Antarctic territory has seen a rise in the number of tourists and scientists. This has led to an increase in the anthropogenic footprint in Antarctic ecosystems, namely in terms of emerging contaminants, such as Biocides, Persistent Organic Pollutants (POPs) as well as Pharmaceutical and Personal Care Products (PPCPs). Yet scarce information on the presence of these emerging contaminants is available for trophic compartments, especially the phytoplankton community. Using high resolution Fourier-tr...
Source: Chemosphere - February 19, 2021 Category: Chemistry Authors: Bernardo Duarte Carla Gameiro Ana Rita Matos Andreia Figueiredo Marta Sousa Silva Carlos Cordeiro Isabel Ca çador Patrick Reis-Santos Vanessa Fonseca Maria Teresa Cabrita Source Type: research