Bioelectrochemical reactor to manage anthropogenic sulfate pollution for freshwater ecosystems: Mathematical modeling and experimental validation
This study aimed to develop an application-based mathematical model to evaluate the performance of BESs across a range of reactor configurations and operational modes. The model was based on sulfate transformation by hydrogenotrophic sulfate-reducing bacteria coupled with the recovery of solid iron sulfide species formed by the oxidative dissolution of dissolved ferrous iron from a stainless steel anode. Sulfate removal closely corresponded to the rate of electrolytic hydrogen production and hydraulic residence time but was less sensitive to specific microbial rate constants. The mathematical model results were compared to...
Source: Chemosphere - April 20, 2024 Category: Chemistry Authors: Matthew J Berens Tobin W Deen Chan Lan Chun Source Type: research
Presence of humic acid in the environment holds promise as a potential mitigating factor for the joint toxicity of polystyrene nanoplastics and herbicide atrazine to Chlorella vulgaris: 96-h acute toxicity
This study firstly highlights the role of HA in mitigating the toxicity of PS-NH2 when combined with other harmful compounds, enhancing our understanding of HA's presence in the environment.PMID:38642775 | DOI:10.1016/j.chemosphere.2024.142061 (Source: Chemosphere)
Source: Chemosphere - April 20, 2024 Category: Chemistry Authors: Mehdi Khoshnamvand Dongmei You Yafang Xie Yixiao Feng Marriya Sultan Xingyi Wei Jingli Li Ailing Fu De-Sheng Pei Source Type: research
Conjugated Bisphenol S Metabolites in Human Serum and Whole Blood
In this study, paired human serum and whole blood samples (n = 79) were collected from Chinese participants, and were measured for the occurrence of BPS and 4 BPS metabolites. BPS was detectable in 49% of human serum (< LOD-1.7 ng/mL) and 78% of whole blood (< LOD-2.1 ng/mL) samples. In both human serum and whole blood, BPS-sulfate (BPS-S; 74% and 86%, respectively) and BPS-glucuronide (BPS-G; 68% and 84%, respectively) had higher detection frequency than BPS. Consistently, BPS-S was the predominant BPS metabolite in human serum (mean 0.39 ng/mL) and whole blood (0.41 ng/mL), significantly higher than BPS-G (mean 0.1...
Source: Chemosphere - April 20, 2024 Category: Chemistry Authors: Zhenling Fu Hangbiao Jin Weili Mao Zefu Hu Source Type: research
Synergistic interactions between the emerging contaminant ivermectin and the ubiquitous pesticide glyphosate at an environmentally relevant ratio on Rhinella arenarum larvae
Chemosphere. 2024 Apr 18:142058. doi: 10.1016/j.chemosphere.2024.142058. Online ahead of print.ABSTRACTGlyphosate (GLY) is a widely used broad-spectrum herbicide, and ivermectin (IVM) is a commonly used antiparasitic in livestock farming. Both substances can be found in water bodies from agricultural areas and can have negative impacts on ecosystems. The aim of this study was to evaluate the lethal and sublethal toxicity individually and in combination of a glyphosate-based herbicide (GBH) and an ivermectin commercial formulation (ICF). Groups of 10 larvae were exposed for 504 h, in triplicate to a concentration gradient o...
Source: Chemosphere - April 20, 2024 Category: Chemistry Authors: Julieta Peluso Fanny Gamarra Carolina M Aronzon Source Type: research
Microcosm study reveals the microbial and environmental effects on tributyltin degradation in an estuarine sediment
This study therefore aimed at better understanding TBT biodegradation in estuarine sediment and the microbial community associated with it. Microcosm experiments were set up, embracing a range of environmental control parameters. Major community shifts were recorded, mainly attributed to the change in oxygen status. The highest percentage of degradation (36,8%) occurred at 4°C in anaerobic conditions. These results are encouraging for the in-situ bioremediation of TBT contaminated muddy sediment in temperate ports worldwide. However, with TBT able to persist in the coastal environment for decades when undisturbed in anoxi...
Source: Chemosphere - April 20, 2024 Category: Chemistry Authors: A Polrot S Lee J R Kirby P Shum J W Birkett G P Sharples Source Type: research
Effects of micro-nano plastics on the environmental biogeochemical cycle of nitrogen: a comprehensive review
Chemosphere. 2024 Apr 18:142079. doi: 10.1016/j.chemosphere.2024.142079. Online ahead of print.ABSTRACTMicro-nano plastics (MNPs; size < 5 mm), ubiquitous and emerging pollutants, accumulated in the natural environment through various sources, and are likely to interact with nutrients, thereby influencing their biogeochemical cycle. Increasing scientific evidences reveal that MNPs can affect nitrogen (N) cycle processes by affecting biotopes and organisms in the environmental matrix and MNPs biofilms, thus plays a crucial role in nitrous oxide (N2O) and ammonia (NH3) emission. Yet, the mechanism and key processes behind...
Source: Chemosphere - April 20, 2024 Category: Chemistry Authors: Tingting Zhang Xiao-San Luo Amit Kumar Xin Liu Xin Tong Xuewen Yao Jiayi Fan Zhihuai Chen Sadashiv Chaturvedi Source Type: research
Microbial synergies drive Simultaneous Biodegradation of Ethoxy and Alkyl chains of Nonylphenol Ethoxylate in Fluidized Bed Reactors
This study investigates the effectiveness of a Fluidized Bed Reactor (FBR) in reducing the production of 4-Nonylphenol (4-NP) during the biodegradation of NPEO. Two identical Fluidized Bed Reactors (FBR) filled with sand were used to assess the NPEO degradation and to enhance the microbial consortia capable of breaking down the complex byproducts, ethanol and fumarate were introduced as co-substrates. Our findings demonstrate the significant potential of the FBR, especially when coupled with fumarate, for enhancing the surfactant degradation. It outperforms the efficiency achieved with ethanol as the primary electron donor...
Source: Chemosphere - April 20, 2024 Category: Chemistry Authors: Henrique S Dornelles Carolina A Sabatini Maria A T Adorno Edson L Silva Po-Heng Lee Maria Bernadete A Varesche Source Type: research
Synergistic developmental effects of zebrafish exposed to combined perfluorooctanoic acid and atrazine
Chemosphere. 2024 Apr 18:142080. doi: 10.1016/j.chemosphere.2024.142080. Online ahead of print.ABSTRACTPerfluorooctanoic acid (PFOA) and atrazine are two endocrine disruptors that are widely found in waters. Negative effects of PFOA and atrazine have been studied individually, but few data have focused on their combined effects. Here, zebrafish embryos were used as model to investigate the combined toxicity of PFOA and atrazine. The acute toxicity of atrazine (11.9 mg/L) to zebrafish embryos was much higher than that of perfluorooctanoic acid (224.6 mg/L) as shown by the 120h-LC50 value. Developmental effects, including de...
Source: Chemosphere - April 20, 2024 Category: Chemistry Authors: Xiaoyu Zhao Beinan Wang Xiao Song Linjuan He Wei Zhang Yongzhong Qian Xiyan Mu Jing Qiu Source Type: research
Bioelectrochemical reactor to manage anthropogenic sulfate pollution for freshwater ecosystems: Mathematical modeling and experimental validation
This study aimed to develop an application-based mathematical model to evaluate the performance of BESs across a range of reactor configurations and operational modes. The model was based on sulfate transformation by hydrogenotrophic sulfate-reducing bacteria coupled with the recovery of solid iron sulfide species formed by the oxidative dissolution of dissolved ferrous iron from a stainless steel anode. Sulfate removal closely corresponded to the rate of electrolytic hydrogen production and hydraulic residence time but was less sensitive to specific microbial rate constants. The mathematical model results were compared to...
Source: Chemosphere - April 20, 2024 Category: Chemistry Authors: Matthew J Berens Tobin W Deen Chan Lan Chun Source Type: research
Presence of humic acid in the environment holds promise as a potential mitigating factor for the joint toxicity of polystyrene nanoplastics and herbicide atrazine to Chlorella vulgaris: 96-h acute toxicity
This study firstly highlights the role of HA in mitigating the toxicity of PS-NH2 when combined with other harmful compounds, enhancing our understanding of HA's presence in the environment.PMID:38642775 | DOI:10.1016/j.chemosphere.2024.142061 (Source: Chemosphere)
Source: Chemosphere - April 20, 2024 Category: Chemistry Authors: Mehdi Khoshnamvand Dongmei You Yafang Xie Yixiao Feng Marriya Sultan Xingyi Wei Jingli Li Ailing Fu De-Sheng Pei Source Type: research
Conjugated Bisphenol S Metabolites in Human Serum and Whole Blood
In this study, paired human serum and whole blood samples (n = 79) were collected from Chinese participants, and were measured for the occurrence of BPS and 4 BPS metabolites. BPS was detectable in 49% of human serum (< LOD-1.7 ng/mL) and 78% of whole blood (< LOD-2.1 ng/mL) samples. In both human serum and whole blood, BPS-sulfate (BPS-S; 74% and 86%, respectively) and BPS-glucuronide (BPS-G; 68% and 84%, respectively) had higher detection frequency than BPS. Consistently, BPS-S was the predominant BPS metabolite in human serum (mean 0.39 ng/mL) and whole blood (0.41 ng/mL), significantly higher than BPS-G (mean 0.1...
Source: Chemosphere - April 20, 2024 Category: Chemistry Authors: Zhenling Fu Hangbiao Jin Weili Mao Zefu Hu Source Type: research
Synergistic interactions between the emerging contaminant ivermectin and the ubiquitous pesticide glyphosate at an environmentally relevant ratio on Rhinella arenarum larvae
Chemosphere. 2024 Apr 18:142058. doi: 10.1016/j.chemosphere.2024.142058. Online ahead of print.ABSTRACTGlyphosate (GLY) is a widely used broad-spectrum herbicide, and ivermectin (IVM) is a commonly used antiparasitic in livestock farming. Both substances can be found in water bodies from agricultural areas and can have negative impacts on ecosystems. The aim of this study was to evaluate the lethal and sublethal toxicity individually and in combination of a glyphosate-based herbicide (GBH) and an ivermectin commercial formulation (ICF). Groups of 10 larvae were exposed for 504 h, in triplicate to a concentration gradient o...
Source: Chemosphere - April 20, 2024 Category: Chemistry Authors: Julieta Peluso Fanny Gamarra Carolina M Aronzon Source Type: research
Australian Black Summer smoke signal on Antarctic aerosol collected between New Zealand and the Ross Sea
In this study, five aerosol samples (total suspended particles with a diameter >1 μm) were collected during the XXXV Italian Expedition in Antarctica on board of the R/V Laura Bassi from 6th of January to 16th of February 2020, along the sailing route from Lyttelton harbor (New Zealand) to Terra Nova Bay (Antarctica). Levoglucosan and its isomers have been analyzed as markers of BB, together with polycyclic aromatic hydrocarbons (PAHs), sucrose and alcohol sugars. Ionic species and carboxylic acids have been analyzed to support the identification of aerosol sources and its aging. Results showed high levoglucosan concen...
Source: Chemosphere - April 19, 2024 Category: Chemistry Authors: Elisa Scalabrin Elena Barbaro Sarah Pizzini Marta Radaelli Matteo Feltracco Rossano Piazza Andrea Gambaro Gabriele Capodaglio Source Type: research
A comprehensive and molecular level evaluation of treated wastewater reusing via drip systems: interactions of dissolved ions and hydraulic shear stresses on calcium carbonate scaling
Chemosphere. 2024 Apr 17:142071. doi: 10.1016/j.chemosphere.2024.142071. Online ahead of print.ABSTRACTTo overcome the global water shortage, the treated wastewater is increasingly utilized in agricultural irrigation, and thus reducing freshwater consumption and increasing the water sustainability. Drip irrigation technology is the most appropriate irrigation method to utilize these water sources. However, its operating performance is negatively affected by calcium carbonate (CaCO3) scaling, which is one of the most dominant precipitations and also closely related to dissolved ions and the hydraulic characteristics inside ...
Source: Chemosphere - April 19, 2024 Category: Chemistry Authors: Yan Shen Bo Zhou Jaume Puig-Bargu és Yang Xiao Wenchao Liu Buchun Si Yunkai Li Source Type: research
Study on the mechanism and degradation behavior of Encifer adhaerens DNM-S1 capturing dimethyl phthalate
Chemosphere. 2024 Apr 17:141919. doi: 10.1016/j.chemosphere.2024.141919. Online ahead of print.ABSTRACTThe global concern surrounding pollution caused by phthalates is escalating, with dimethyl phthalate (DMP) emerging as one of the most prevalent contaminants within the phthalates (PAEs) category. Although the biodegradation of DMP is considered both safe and efficient, its underlying degradation mechanism is not yet fully elucidated, and the degradation performance can be somewhat inconsistent. To address this issue, our study isolated a DMP-degrading bacterium (DNM-S1) from a vegetable greenhouse. The resulting data rev...
Source: Chemosphere - April 19, 2024 Category: Chemistry Authors: Lei Wang Chengcheng Feng Yuxin Chen Qingqing Meng Jingwei Li Yi Liu Wenqian Zhang Zhe Li Jianhua Qu Ying Zhang Source Type: research
