Carbamazepine degradation by heterogeneous activation of peroxymonosulfate with lanthanum cobaltite perovskite: Performance, mechanism and toxicity
Publication date: Available online 17 January 2020Source: Journal of Environmental SciencesAuthor(s): Huichao Guo, Xuefei Zhou, Yalei Zhang, Qiufang Yao, Yajie Qian, Huaqiang Chu, Jiabin ChenAbstractThe widely used carbamazepine (CBZ) is one of the most persistent pharmaceuticals and suffers insufficient removal efficiency by conventional wastewater treatment. A synthesized Co-based perovskite (LaCoO3) was used to activate peroxymonosulfate (PMS) in order to degrade CBZ. Results showed that LaCoO3 exhibited an excellent performance in PMS activation and CBZ degradation at neutral pH, with low cobalt leaching. The results o...
Source: Journal of Environmental Sciences - January 18, 2020 Category: Environmental Health Source Type: research

Ion-exchange polymers modified bacterial cellulose electrodes for the selective removal of nitrite ions from tail water of dyeing wastewater
Publication date: Available online 13 January 2020Source: Journal of Environmental SciencesAuthor(s): Danping Li, Xun-an Ning, Yiqian Yuan, Yanxiang Hong, Jianpei ZhangAbstractIon-exchange polymer and modified carbonization bacterial cellulose (CBC) electrodes were fabricated using varying amounts of cation-exchange polymers (glutaric acid (GA) and sulfosuccinic acid (SSA)) and assembled within an asymmetric capacitive deionization unit (p-CDI). The performance of selective NO2− electro-adsorption was studied. The AC/CBC-SSA group showed a better salt adsorption capacity (14.56 mg/g) and nitrite removal efficien...
Source: Journal of Environmental Sciences - January 15, 2020 Category: Environmental Health Source Type: research

Degradation of organic contaminants through the activation of oxygen using zero valent copper coupled with sodium tripolyphosphate under neutral conditions
In this study, sodium tripolyphosphate (STPP) was used to promote the removal of organic pollutants in a zero-valent copper (ZVC)/O2 system under neutral conditions for the first time. 20 mg/L p-nitrophenol (PNP) can be completely decomposed within 120 min in the ZVC/O2/STPP system. The PNP degradation process followed pseudo-first-order kinetics and the degradation rate of PNP gradually increased upon the decreasing ZVC particle size. The optimal pH of the reaction system was 5.0. Our mechanism investigation showed that Cu+ generated by ZVC corrosion was the main reducing agent for the activation of O2 to produc...
Source: Journal of Environmental Sciences - January 15, 2020 Category: Environmental Health Source Type: research

Exposure to polycyclic aromatic hydrocarbons and risk for premature ovarian failure and reproductive hormones imbalance
Publication date: Available online 10 January 2020Source: Journal of Environmental SciencesAuthor(s): Xiaoqing Ye, Wuye Pan, Chunming Li, Xiaochen Ma, Shanshan Yin, Jianhong Zhou, Jing LiuAbstractPolycyclic aromatic hydrocarbons (PAHs) are a typical class of persistent organic pollutants that is ubiquitous worldwide. Previous animal studies suggested that PAHs had adverse effects on female reproduction. However, the human data regarding relationship of PAHs exposure with women reproductive health, such as ovarian dysfunction, are scarce. In this case-control study, the associations of serum levels of PAHs with the risk of ...
Source: Journal of Environmental Sciences - January 11, 2020 Category: Environmental Health Source Type: research

Fast and efficient aqueous arsenic removal by functionalized MIL-100(Fe)/rGO/δ-MnO2 ternary composites: Adsorption performance and mechanism
In this study, an Fe-based metal-organic framework (MOF) (Materials of Institut Lavoisier: MIL-100 (Fe)) which was impregnated with reduced graphene oxide (rGO) by using a simple hydrothermal method and coated with birnessite-type manganese oxide (δ-MnO2) using the one-pot reaction process (MIL-100(Fe)/rGO/δ-MnO2 nanocomposites) was synthesized and applied successfully in As removal. The removal efficiency was rapid, the equilibrium was achieved in 40 min and 120 min for As(III) and As(V), respectively, at a level of 5 mg/L. The maximum adsorption capacities of As(III) and As(V) at pH 2 were 192....
Source: Journal of Environmental Sciences - January 11, 2020 Category: Environmental Health Source Type: research

Chemical fixation of toxic metals in stainless steel pickling residue by Na2S∙xH2O, FeSO4∙6H2O and phosphoric acid for beneficial uses
This study provides a useful implication in treatment and beneficial reuse of heavy metal-containing hazardous wastes.Graphical abstract (Source: Journal of Environmental Sciences)
Source: Journal of Environmental Sciences - January 9, 2020 Category: Environmental Health Source Type: research

Defect-enhanced photocatalytic removal of dimethylarsinic acid over mixed-phase mesoporous TiO2
Publication date: Available online 3 January 2020Source: Journal of Environmental SciencesAuthor(s): Jingjing Dong, Chengzhi Hu, Weixiao Qi, Xiaoqiang An, Huijuan Liu, Jiuhui QuAbstractMuch attention has been paid to the pollutant dimethylarsenic acid (DMA), because of its high toxicity even at very low doses. Although TiO2 photocatalytic oxidation (PCO) is one of the few effective methods for treating DMA-containing water, the efficient decomposition of DMA and simultaneous removal of toxic arsenic species remains a significant but challenging task. Here, defective mesoporous TiO2 with mixed-phase structure was synthesize...
Source: Journal of Environmental Sciences - January 5, 2020 Category: Environmental Health Source Type: research

The effect of dissolved oxygen concentration on long-term stability of partial nitrification process
Publication date: Available online 31 December 2019Source: Journal of Environmental SciencesAuthor(s): Bin Cui, Qing Yang, Xiuhong Liu, Siting Huang, Yubing Yang, Zhibin LiuAbstractDissolved oxygen (DO) concentration is regarded as one of the crucial factors to influence partial nitrification process. However, achieving and keeping stable partial nitrification under different DO concentrations were widely reported. The mechanism of DO concentration influencing partial nitrification is still unclear. Therefore, in this study two same sequencing batch reactors (SBRs) cultivated same seeding sludge were built up with real-tim...
Source: Journal of Environmental Sciences - January 2, 2020 Category: Environmental Health Source Type: research

Release of deposited MnO2 nanoparticles from aqueous surfaces
In this study, the release of MnO2 nanoparticles was investigated using a quartz crystal microbalance with dissipation monitoring (QCM-D), and different environmental surface types, solution pH values and representative macromolecular organics were considered. MnO2 nanoparticles were first deposited on crystal sensors at elevated NaNO3 concentrations before being rinsed with double-deionized water to induce their remobilization. The results reveal that the release rate of MnO2 depends on the surface type, in the decreasing order: SiO2> Fe3O4 > Al2O3, resulting from electrostatic interactions between the sur...
Source: Journal of Environmental Sciences - January 2, 2020 Category: Environmental Health Source Type: research

Seasonality of carbonaceous aerosol composition and light absorption properties in Karachi, Pakistan
This study presents a comprehensive measurement of seasonality of CA compositions and mass absorption cross-section (MAC) of elemental carbon (EC) and water-soluble organic carbon (WSOC) in total suspended particles (TSP) collected from February 2015 to March 2017 in the southwest part of Karachi. The average TSP, organic carbon (OC), and EC concentrations were extremely high with values as 391.0 ± 217.0, 37.2 ± 28.0, and 8.53 ± 6.97 μg/m3, respectively. These components showed clear seasonal variations with high concentrations occurring during fall and winter foll...
Source: Journal of Environmental Sciences - December 30, 2019 Category: Environmental Health Source Type: research

Influence of environmental factors on arsenic accumulation and biotransformation using the aquatic plant species Hydrilla verticillata
Publication date: Available online 27 December 2019Source: Journal of Environmental SciencesAuthor(s): Yuan Zhao, Zhuo Zhen, Zhenhong Wang, Liqing Zeng, Changzhou YanAbstractHydrilla verticillata (waterthyme) has been successfully used for phytoremediation in arsenic (As) contaminated water. To evaluate the effects of environmental factors on phytoremediation, this study conducted a series of orthogonal design experiments to determine optimal conditions, including phosphorus (P), nitrogen (N), and arsenate (As(V)) concentrations and initial pH levels, for As accumulation and biotransformation using this aquatic plant speci...
Source: Journal of Environmental Sciences - December 28, 2019 Category: Environmental Health Source Type: research

Characterization of Fe5(AsO3)3Cl2(OH)4·5H2O, a new ferric arsenite hydroxychloride precipitated from FeCl3–As2O3–HCl solutions relevant to arsenic immobilization
Publication date: Available online 26 December 2019Source: Journal of Environmental SciencesAuthor(s): Zidan Yuan, Xu Ma, Xing Wu, Guoqing Zhang, Xin Wang, Shaofeng Wang, Yongfeng JiaAbstractTooeleite (Fe6(AsO3)4SO4(OH)4·4H2O) is widely precipitated for direct As(III) removal from sulfate-rich industrial effluents. However, whether or not Fe(III)–As(III)–Cl(-I) precipitate is produced in chloridizing leaching media for As immobilization is almost unknown. This work founded the existence of ferric arsenite (hydroxy)chloride as a new mineral for As(III) removal. Its chemical composition and solid character...
Source: Journal of Environmental Sciences - December 27, 2019 Category: Environmental Health Source Type: research

A selective N,N-dithenoyl-rhodamine based fluorescent probe for Fe3+ detection in aqueous and living cells
Publication date: Available online 24 December 2019Source: Journal of Environmental SciencesAuthor(s): Yi Liu, Cuixia Zhao, Xiangyun Zhao, Huili Liu, Yibin Wang, Yuguo Du, Dongbin WeiAbstractA novel N,N-dithenoyl-rhodamine based fluorescent and colorimetric Fe3+ probe 1 was designed and synthesized by only one step from Rhodamine B hydrazide and 2-thiophenecarbonyl chloride. The structure of probe 1 was characterized by 1H NMR/13C NMR spectroscopy, IR spectroscopy, and HRMS spectrometry. Accompanying with significant changes in visual color and fluorescent spectrum, probe 1 displayed good sensitivity for Fe3+ with an abroa...
Source: Journal of Environmental Sciences - December 26, 2019 Category: Environmental Health Source Type: research

A review of removal technology for antimony in aqueous solution
Publication date: Available online 24 December 2019Source: Journal of Environmental SciencesAuthor(s): Xiaojing Long, Xin Wang, Xuejun Guo, Mengchang HeAbstractAntimony (Sb) and its compounds, toxic metalloid, have been classified as high-priority pollutants. Increasing Sb released into the water environment by natural processes and anthropogenic activities, which exposure threatens to human health and ecosystems. Therefore, it is of unquestionable importance to remove Sb from polluted water. Keeping in view the extreme importance of this issue, we summarize the source, chemistry, speciation, distribution, toxicity, and po...
Source: Journal of Environmental Sciences - December 26, 2019 Category: Environmental Health Source Type: research

Simulation of three-stage operating temperature for supersaturation water-based condensational growth tube
Publication date: Available online 24 December 2019Source: Journal of Environmental SciencesAuthor(s): Jiejie Bian, Huaqiao Gui, Zhibo Xie, Tongzhu Yu, Xiuli Wei, Wenyu Wang, Jianguo LiuAbstractIn order to realize accurate dynamic control of supersaturation and to study condensation growth characteristics of nanoparticles through different levels of supersaturation, a series of parametric analyses and systematic comparisons between two-stage and three-stage operating temperature designs were simulated with COMSOL Multiphysics. The simulation results showed that the three-stage operating temperature did not change peak supe...
Source: Journal of Environmental Sciences - December 26, 2019 Category: Environmental Health Source Type: research

Effect of intermittent aeration mode on nitrogen concentration in the water column and sediment pore water of aquaculture ponds
Publication date: Available online 24 December 2019Source: Journal of Environmental SciencesAuthor(s): Dantong Zhu, Xiangju Cheng, David J. Sample, Mohammad Nayeb YazdiAbstractNitrogen in pond sediments is a major water quality concern and can impact the productivity of aquaculture. Dissolved oxygen is an important factor for improving water quality and boosting fish growth in aquaculture ponds, and plays an important role in the conversion of ammonium-nitrogen (NH4+-N) to nitrite-nitrogen (NO2−-N) and eventually nitrate-nitrogen (NO3−-N). A central goal of the study was to identify the best aeration method and...
Source: Journal of Environmental Sciences - December 24, 2019 Category: Environmental Health Source Type: research

Assessments on emergy and greenhouse gas emissions of internal combustion engine automobiles and electric automobiles in the USA
Publication date: Available online 24 December 2019Source: Journal of Environmental SciencesAuthor(s): Ran Jing, Chen Yuan, Hamidreza Rezaei, Jin Qian, Zhen ZhangAbstractIncreasing energy consumption in the transportation sector results in challenging greenhouse gas (GHG) emissions and environmental problems. This paper involved integrated assessments on GHG emissions and emergy of the life cycle for the internal combustion engine (ICE) and electric automobiles in the USA over the entire assumed fifteen-year lifetime. The hotspots of GHG emissions as well as emergy indices for the major processes of automobile life cycle w...
Source: Journal of Environmental Sciences - December 24, 2019 Category: Environmental Health Source Type: research

Drought can offset potential water use efficiency of forest ecosystems from rising atmospheric CO2
Publication date: Available online 19 December 2019Source: Journal of Environmental SciencesAuthor(s): Ning Liu, Jatin Kala, Shirong Liu, Vanessa Haverd, Bernard Dell, Keith R.J. Smettem, Richard J. HarperAbstractIncreasing atmospheric CO2 is both leading to climate change and providing a potential fertilisation effect on plant growth. However, southern Australia has also experienced a significant decline in rainfall over the last 30 years, resulting in increased vegetative water stress. To better understand the dynamics and responses of Australian forest ecosystems to drought and elevated CO2, the magnitude and trend in w...
Source: Journal of Environmental Sciences - December 20, 2019 Category: Environmental Health Source Type: research

The dynamic development of bacterial community following long-term weathering of bauxite residue
Publication date: Available online 19 December 2019Source: Journal of Environmental SciencesAuthor(s): Hao Wu, Li Chen, Feng Zhu, William Hartley, Yifan Zhang, Shengguo XueAbstractBauxite residue is the industrial waste generated from alumina production and commonly deposited in impoundments. These sites are bare of vegetation due to the extreme high salinity and alkalinity, as well as lack of nutrients. However, long term weathering processes could improve residue properties to support the plant establishment. Here we investigate the development of bacterial communities and the geochemical drivers in bauxite residue, usin...
Source: Journal of Environmental Sciences - December 20, 2019 Category: Environmental Health Source Type: research

Detrimental role of residual surface acid ions on ozone decomposition over Ce-modified γ-MnO2 under humid condition
This study revealed the detrimental effect of surface acid ions on the activity of catalysts under humid and dry atmosphere, and provided guidance for the development of highly efficient catalysts for ozone decomposition.Graphical abstract (Source: Journal of Environmental Sciences)
Source: Journal of Environmental Sciences - December 20, 2019 Category: Environmental Health Source Type: research

Ultra-low concentration of total organic carbon in ultrapure water using ion-exchange resin embedding silanized magnetic nanoparticles
Publication date: Available online 18 December 2019Source: Journal of Environmental SciencesAuthor(s): Jung Joon Lee, Jihyeon Park, Bo-Hyun Kim, Sunjong LeeAbstractRegeneration of pure water is an important issue not only for the healthy life but also for the fine control of precise processes in various industries. One important issue in ultra-high purified water is to reduce the amount of total organic carbon (TOC). Herein, we introduce a new approach to reduce the TOC using the surface silanized nanoparticles, in which the magnetic nanoparticles (mNPs) are silanized and then complexed with ion exchange resin (IER) beads....
Source: Journal of Environmental Sciences - December 20, 2019 Category: Environmental Health Source Type: research

Effects of SO2 and H2O on low-temperature NO conversion over F-V2O5-WO3/TiO2 catalysts
Publication date: Available online 18 December 2019Source: Journal of Environmental SciencesAuthor(s): Quanming Liang, Jian Li, Hong He, Tao YueAbstractF-V2O5-WO3/TiO2 catalysts were prepared by the impregnation method. As the content of F ions increased from 0.00 to 0.35 wt.%, the NO conversion of F-V2O5-WO3/TiO2 catalysts initially increased and then decreased. The 0.2F-V2O5-WO3/TiO2 catalyst (0.2 wt.% F ion) exhibited the best denitration (De-NOx) performance, with more than 95% NO conversion in the temperature range 160–360°C, and 99.0% N2 selectivity between 110 and 280°C. The addition of an ap...
Source: Journal of Environmental Sciences - December 20, 2019 Category: Environmental Health Source Type: research

Simulated photo-degradation of dissolved organic matter in lakes revealed by three-dimensional excitation-emission matrix with regional integration and parallel factor analysis
Publication date: Available online 18 December 2019Source: Journal of Environmental SciencesAuthor(s): Jin Zhang, Fanhao Song, Tingting Li, Kefu Xie, Huiying Yao, Baoshan Xing, Zhongyu Li, Yingchen BaiAbstractSimulated photo-degradation of fluorescent dissolved organic matter (FDOM) in Lake Baihua (BH) and Lake Hongfeng (HF) was investigated with three-dimensional excitation-emission matrix (3DEEM) fluorescence combined with the fluorescence regional integration (FRI), parallel factor (PARAFAC) analysis, and multi-order kinetic models. In the FRI analysis, fulvic-like and humic-like materials were the main constituents for...
Source: Journal of Environmental Sciences - December 18, 2019 Category: Environmental Health Source Type: research

Facile synthesis of graphene-based hyper-cross-linked porous carbon composite with superior adsorption capability for chlorophenols
This study demonstrated that the GN/HCPC composite can be utilized as a practical and efficient adsorbent for the removal of organic contaminants in wastewater.Graphical abstract (Source: Journal of Environmental Sciences)
Source: Journal of Environmental Sciences - December 18, 2019 Category: Environmental Health Source Type: research

‘Emulsion locks’ for the containment of hydrocarbons during surfactant flushing
Publication date: Available online 18 December 2019Source: Journal of Environmental SciencesAuthor(s): Kristine Lamont, Alejandro Marangoni, Erica PensiniAbstractReversible double water in oil in water (W/O/W) emulsions were developed to contain subsurface hydrocarbon spills during their remediation using surfactant flushing. Double emulsions were prepared by emulsifying CaCl2 solutions in canola oil, and subsequently by emulsifying the W/O emulsions in aqueous sodium alginate solutions. The formation of double emulsions was confirmed with confocal and optical microscopy. The double emulsions reversed and gelled when mixed...
Source: Journal of Environmental Sciences - December 18, 2019 Category: Environmental Health Source Type: research

A collaborative strategy for enhanced reduction of Cr(VI) by Fe(0) in the presence of oxalate under sunlight: Performance and mechanism
Publication date: Available online 18 December 2019Source: Journal of Environmental SciencesAuthor(s): Qi Zhou, Yang Li, Heng Yang, Yun GaoAbstractNanometer-size zero-valent iron (NZVI) is an efficient reducing agent, but its surface is easily passivated with an oxide layer, leading to reaction inefficiency. In our study, oxalate (OA) was introduced into this heterogeneous system of NZVI, which could form ferrioxalate complexes with the NZVI surface-bound Fe3+ and dissolved Fe3+ in the solution. Photolysis of ferrioxalate complexes can facilitate the generation of Fe2+ from Fe3+ and CO2•- radical, both species have st...
Source: Journal of Environmental Sciences - December 18, 2019 Category: Environmental Health Source Type: research

Carbon reduction potential and cost evaluation of different mitigation approaches in China's coal to olefin Industry
Publication date: Available online 16 December 2019Source: Journal of Environmental SciencesAuthor(s): Qun Shen, Xuehang Song, Fang Mao, Nannan Sun, Xia Wen, Wei WeiAbstractCoal-based olefin (CTO) industry as a complement of traditional petrochemical industry plays vital role in China's national economic development. However, high CO2 emission in CTO industry is one of the fatal problems to hinder its development. In this work, the carbon emission and mitigation potentials by different reduction pathways are evaluated. The economic cost is analyzed and compared as well. According to the industry development plan, the carbo...
Source: Journal of Environmental Sciences - December 16, 2019 Category: Environmental Health Source Type: research

Spatiotemporal characterization and regional contributions of O3 and NO2: An investigation of two years of monitoring data in Henan, China
Publication date: April 2020Source: Journal of Environmental Sciences, Volume 90Author(s): Shijie Yu, Shasha Yin, Ruiqin Zhang, Lingling Wang, Fangcheng Su, Yixiang Zhang, Jian YangAbstractTo investigate the characteristics of ground level ozone (O3) for Henan Province, the ambient air quality monitoring data of 2015 and 2016 were analyzed. The result showed that the 8 h-max-O3 concentrations displayed a distinct seasonality, where the maximum and minimum values, averaging 140.41, 54.19 μg/m3, occurred in summer and winter, respectively. There is a significant correlation between meteorological factors and O3 conce...
Source: Journal of Environmental Sciences - December 15, 2019 Category: Environmental Health Source Type: research

Water chemistry influences on long-term dissolution kinetics of CdSe/ZnS quantum dots
Publication date: Available online 12 December 2019Source: Journal of Environmental SciencesAuthor(s): Pooya Paydary, Philip Larese-CasanovaAbstractWidespread usage of engineered metallic quantum dots (QDs) within consumer products has evoked a need to assess their fate within environmental systems. QDs are mixed-metal nanocrystals that often include Cd2+ which poses a health risk as a nanocrystal or when leached into water. The goal of this work is to study the long-term metal cation leaching behavior and the factors affecting the dissolution processes of mercaptopropionic acid (MPA) capped CdSe/ZnS QDs in aphotic conditi...
Source: Journal of Environmental Sciences - December 13, 2019 Category: Environmental Health Source Type: research

Improved dark ambient degradation of organic pollutants by cerium strontium cobalt perovskite
Publication date: Available online 11 December 2019Source: Journal of Environmental SciencesAuthor(s): Huihuang Chen, Julius Motuzas, Wayde Martens, João C. Diniz da CostaAbstractThis work investigates the effect of cerium substation into strontium cobalt perovskites (CeSrCoO) for the oxidative degradation of Orange II (OII) in dark ambient conditions without the aid of any external stimulants such as light, heating or chemical additives. The OII degradation rate by CeSrCoO reached 65% in the first hour, whilst for the blank sample without cerium (SrCoO) took over 2 hr to reach the same level of OII degradation...
Source: Journal of Environmental Sciences - December 11, 2019 Category: Environmental Health Source Type: research

Enhancing the total organic carbon measurement efficiency for water samples containing suspended solids using alkaline and ultrasonic pretreatment methods
In this study, we investigated the effect of sample pretreatments (ultrasonication and alkaline extraction) on total organic carbon (TOC) measurements for water samples containing suspended solids (SS) of four different origins (algae, soil, sewage sludge, and leaf litter) to more clearly assess the impact of particulate organic carbon (POC) in water. The effects each of ultrasonication (power, pulse, etc.) and alkaline extraction condition (concentration, time, etc.) on the TOC recovery and precision were investigated, and the results were compared with those of a new sample pretreatment method combining both methods. Alk...
Source: Journal of Environmental Sciences - December 11, 2019 Category: Environmental Health Source Type: research

Quantitative structure-activity relationship in the photodegradation of azo dyes
Publication date: Available online 9 December 2019Source: Journal of Environmental SciencesAuthor(s): Guoyang Zhang, Shujuan ZhangAbstractThe photolysis characteristics of azo dyes are critically important in environmental pollution control, dye-sensitized solar cells, and dyeing-related industries. However, there is still lack of quantitative relationship between the structures of azo dyes and their photolysis characteristics. To address this issue, the photolysis of 22 azo dyes were conducted side by side at three pH (4.0, 6.0, 9.0). The obtained pseudo-first order photodegradation rate constants (k1) were processed with...
Source: Journal of Environmental Sciences - December 11, 2019 Category: Environmental Health Source Type: research

Better understanding of the activated sludge process combining fluorescence-based methods and flow cytometry: A case study
This study aims to demonstrate the validity of fluorescence-based methods, together with flow cytometry, as a complementary tool to conventional physicochemical analyses carried out in wastewater treatment plants (WWTPs), for the control of the currently largely unknown activated sludge process. Staining with SYTO 9, propidium iodide and 5-(and 6)-carboxy-2′,7′-difluorodihydrofluorescein diacetate (carboxy-H2DFFDA) was used for cell viability and oxidative stress monitoring of the bacterial population forming the activated sludge of a WWTP. Throughout the period of research, several unstable periods were detect...
Source: Journal of Environmental Sciences - December 11, 2019 Category: Environmental Health Source Type: research

Phosphate recovery with granular acid-activated neutralized red mud: Fixed-bed column performance and breakthrough curve modelling
Publication date: Available online 9 December 2019Source: Journal of Environmental SciencesAuthor(s): Andong Hu, Guoping Ren, Jiangang Che, Yulin Guo, Jie Ye, Shungui ZhouAbstractGranular acid-activated neutralized red mud (AaN-RM) has been successfully prepared with good chemical stability and physical strength. However, its potential for industrial application remains unknown. Therefore, the performance of granular AaN-RM for phosphate recovery in a fixed-bed column was investigated. The results demonstrated that the phosphate adsorption performance of granular AaN-RM in a fixed-bed column was affected by various operati...
Source: Journal of Environmental Sciences - December 11, 2019 Category: Environmental Health Source Type: research

Mesoporous cobalt monoxide-supported platinum nanoparticles: Superior catalysts for the oxidative removal of benzene
Publication date: Available online 9 December 2019Source: Journal of Environmental SciencesAuthor(s): Jun Yang, Yutong Xue, Yuxi Liu, Jiguang Deng, Xiyun Jiang, Huan Chen, Hongxing DaiAbstractMesoporous Co3O4 (meso-Co3O4)-supported Pt (0.53 wt% Pt/meso-Co3O4) was synthesized via the KIT-6-templating and polyvinyl alcohol (PVA)-assisted reduction routes. Mesoporous CoO (meso-CoO) was fabricated through in situ reduction of meso-Co3O4 with glycerol, and the 0.18–0.69 wt% Pt/meso-CoO samples were generated by the PVA-assisted reduction method. Meso-Co3O4 and meso-CoO were of cubic crystal structure and the Pt ...
Source: Journal of Environmental Sciences - December 11, 2019 Category: Environmental Health Source Type: research

Influence of floc dynamic protection layer on alleviating ultrafiltration membrane fouling induced by humic substances
Publication date: Available online 9 December 2019Source: Journal of Environmental SciencesAuthor(s): Baiwen Ma, Siqi Wu, Bodong Wang, Zenglu Qi, Yaohui Bai, Huijuan Liu, Jiuhui Qu, Ruijun WuAbstractCake layer formation is inevitable over time for ultrafiltration (UF) membrane-based drinking water treatment. Although the cake layer is always considered to cause membrane fouling, it can also act as a “dynamic protection layer”, as it further adsorbs pollutants and dramatically reduces their chance of getting to the membrane surface. Here, the UF membrane fouling performance was investigated with pre-deposited lo...
Source: Journal of Environmental Sciences - December 11, 2019 Category: Environmental Health Source Type: research

Verification of Bacteroidales 16S rRNA markers as a complementary tool for detecting swine fecal pollution in the Yangtze Delta
In this study, we evaluated the efficacy of our two previously developed real time-quantitative PCR (qPCR) assays for the detection of swine-associated Bacteroidales genetic markers (gene 1–38, gene 3–53) in the Yangtze Delta watershed of southeastern China. The results indicated that the gene 1–38 and 3-53 markers exhibited high accuracy (92.5%, 91.7% conditional probability, respectively) in detecting Bacteroidales spp. in water samples. According to binary logistic regression (BLR), these two swine-associated markers were well correlated (P 
Source: Journal of Environmental Sciences - December 9, 2019 Category: Environmental Health Source Type: research

Treatability studies of naphthalene in soil, water and air with persulfate activated by iron(II)
Publication date: Available online 9 December 2019Source: Journal of Environmental SciencesAuthor(s): Gabriela P. Mendes, Vivian M.A. Magalhães, Lélia C.R. Soares, Rayanne M. Aranha, Claudio A.O. Nascimento, Marilda M.G.R. Vianna, Osvaldo Chiavone-FilhoAbstractChemical oxidation was applied to an artificially contaminated soil with naphthalene (NAP). Evaluation of NAP distribution and mass reduction in soil, water and air phases was carried out through mass balance. Evaluation of NAP distribution and mass reduction in soil, water and air phases was carried out through mass balance. The importance of the air p...
Source: Journal of Environmental Sciences - December 9, 2019 Category: Environmental Health Source Type: research

Effect of Al2O3 doping on the structure and performance of an Al2O3/Fe2O3 catalyst for mercury oxidation
In this study, the thermal stability of a Fe2O3 catalyst for mercury oxidation was significantly improved by doping with Al2O3. After 1 hr, the catalyst doped with 10 wt.% Al2O3 still exhibited a mercury conversion efficiency of 70.9%, while the undoped sample even lost its catalytic activity. Doping with Al2O3 retarded the collapse of the catalyst mesoporous structure during high-temperature calcination, and the doped samples maintained a higher specific surface area, smaller pore size, and narrower pore size distribution. Transmission electron microscope images revealed that after calcination at 350 °C...
Source: Journal of Environmental Sciences - December 9, 2019 Category: Environmental Health Source Type: research

An assessment of how distance and diesel oxidation catalyst will impact thermal decomposition behaviors of particles
Publication date: Available online 9 December 2019Source: Journal of Environmental SciencesAuthor(s): Mengzhu Zhang, Yunshan Ge, Chuanzhen Zhang, Xin WangAbstractDecomposition mass loss and pyrolysis products analyses of particles sampled at various locations along the tailpipe of a Euro-IV diesel engine were performed using a thermogravimetry in conjunction with Fourier transformation infrared spectrometry-mass spectrum. Diesel particles were collected at the same location with and without diesel oxidation catalyst (DOC) mounted on the test engine separately. The three poles in thermal gravity-differential thermal gravity...
Source: Journal of Environmental Sciences - December 9, 2019 Category: Environmental Health Source Type: research

Linking the electron donation capacity to the molecular composition of soil dissolved organic matter from the Three Gorges Reservoir areas, China
Publication date: Available online 9 December 2019Source: Journal of Environmental SciencesAuthor(s): Tao Jiang, Joeri Kaal, Jiang Liu, Jian Liang, Yaoling Zhang, Dingyong WangAbstractSoil dissolved organic matter (DOM) plays an essential role in areas of the Three Gorges Reservoir (TGR) as a linkage between terrestrial and aquatic systems. In particular, the reducing capacities of soil DOM influence the geochemistry of contaminants such as mercury (Hg). However, few studies have investigated the molecular information of soil DOM and its relationship with relevant geochemical reactivities, including redox properties. We co...
Source: Journal of Environmental Sciences - December 9, 2019 Category: Environmental Health Source Type: research

Environmental impact and health risk assessment of volatile organic compound emissions during different seasons in Beijing
Publication date: Available online 9 December 2019Source: Journal of Environmental SciencesAuthor(s): Chuanqi Li, Qianqian Li, Dongge Tong, Qingliang Wang, Mingge Wu, Bohua Sun, Guijin Su, Li TanAbstractVolatile organic compounds (VOCs) are major contributors to air pollution. Based on the emission characteristics of 99 VOCs that daily measured at 10 am in winter from 15 December 2015 to 17 January 2016 and in summer from 21 July to 25 August 2016 in Beijing, the environmental impact and health risk of VOC were assessed. In the winter polluted days, the secondary organic aerosol formation potential (SOAP) of VOC (199.70&nb...
Source: Journal of Environmental Sciences - December 9, 2019 Category: Environmental Health Source Type: research

Characteristics of sewer biofilms in aerobic rural small diameter gravity sewers
In this study, biofilms characteristics of aerobic rural SDGS were investigated using simulations in a lab under different flow conditions and slopes. Results indicated that the average thickness of aerobic rural SDGS biofilms was in the range of 350–650 μm, decreasing at locations with variable flow and high slopes. Protein was the most abundant substance in extracellular polymeric substance of SDGS biofilms. The most abundant bacteria, Proteobacteria, Actinobacteria, and Bacteroidetes, and functional bacteria showed different distributions when analyzed through Illumina HiSeq sequencing of 16S rRNA. The rel...
Source: Journal of Environmental Sciences - December 9, 2019 Category: Environmental Health Source Type: research

Degradation of benzene derivatives in the CuMgFe-LDO/persulfate system: The role of the interaction between the catalyst and target pollutants
Publication date: Available online 9 December 2019Source: Journal of Environmental SciencesAuthor(s): Yun Chen, Da Ouyang, Wenying Zhang, Jingchun Yan, Linbo Qian, Lu Han, Mengfang ChenAbstractA novel insight on the role of interactions between target pollutants and the catalyst in the copper-containing layered double oxide (LDO)-catalyzed persulfate (PS) system was elucidated in the present study. 4-Chlorophenol (4-CP), as a representative benzene derivative with a hydroxyl group, was completely removed within 5 min, which was much faster than the reaction of monochlorobenzene (MCB), without a hydroxyl group, with th...
Source: Journal of Environmental Sciences - December 9, 2019 Category: Environmental Health Source Type: research

Density functional theory (DFT) studies of vanadium-titanium based selective catalytic reduction (SCR) catalysts
Publication date: Available online 6 December 2019Source: Journal of Environmental SciencesAuthor(s): Ziwei Zhao, Erwei Li, Yu Qin, Xiaolong Liu, Yang Zou, Heng Wu, Tingyu ZhuAbstractBased on density functional theory (DFT) and basic structure models, the chemical reactions on the surface of vanadium-titanium based selective catalytic reduction (SCR) denitrification catalysts were summarized. Reasonable structural models (non-periodic and periodic structural models) are the basis of density functional calculations. A periodic structure model is more appropriate to represent the catalyst surface, and its theoretical calcula...
Source: Journal of Environmental Sciences - December 7, 2019 Category: Environmental Health Source Type: research

MnCeOx/diatomite catalyst for persulfate activation to degrade organic pollutants
In this study, a novel diatomite supported MnCeOx composite (MnCeOx/diatomite) was prepared and characterized for activation of PS to degrade organic pollutants. Results indicated that diatomite not only dispersed MnCeOx and increased the specific surface area of catalyst, but also improved the low-valence metal site (Mn2+ and Ce3+) and reactive oxygen species site (–OH) of MnCeOx, thus enhancing the activities of MnCeOx. MnCeOx/diatomite/PS showed high efficiency for multiple dyes and pharmaceutical pollutants. Constant rate (k) of MnCeOx/diatomite (kMnCeOx/diatomite) was three times higher than the sum of constant ...
Source: Journal of Environmental Sciences - November 16, 2019 Category: Environmental Health Source Type: research

Spatiotemporal characterization and regional contributions of O3 and NO2: An investigation of 2 years of monitoring data in Henan, China
Publication date: Available online 9 November 2019Source: Journal of Environmental SciencesAuthor(s): Shijie Yu, Shasha Yin, Ruiqin Zhang, Lingling Wang, Fangcheng Su, Yixiang Zhang, Jian YangAbstractTo investigate the characteristics of ground level ozone (O3) for Henan Province, the ambient air quality monitoring data of 2015 and 2016 were analyzed. The result showed that the 8 h-max-O3 concentrations displayed a distinct seasonality, where the maximum and minimum values, averaging 140.41, 54.19 μg/m3, occurred in summer and winter, respectively. There is a significant correlation between meteorological factors a...
Source: Journal of Environmental Sciences - November 10, 2019 Category: Environmental Health Source Type: research

Water quality induced corrosion of stainless steel valves during long-term service in a reverse osmosis system
Publication date: Available online 9 November 2019Source: Journal of Environmental SciencesAuthor(s): Xiyan Xu, Shuming Liu, Ying Liu, Kate Smith, Xiaoting Wang, Junyu Li, Ziqing Ma, Zhangqing Wang, Yong CuiAbstractThe current study analyzes the contribution of 10 water quality parameters (including pH, turbidity, conductivity, total dissolved solids (TDS), hardness, total organic carbon (TOC), alkalinity, calcium ions, chlorides and sulfates) to corrosion extent of stainless steel valves taken from different locations in a reverse osmosis system of a reclaimed water plant. The valves were in service for 5 years. Raman spe...
Source: Journal of Environmental Sciences - November 10, 2019 Category: Environmental Health Source Type: research

Dynamic nano-Ag colloids cytotoxicity to and accumulation by Escherichia coli: Effects of Fe3+, ionic strength and humic acid
Publication date: Available online 9 November 2019Source: Journal of Environmental SciencesAuthor(s): Weicheng Zhang, Bingyu Ning, Caiyun Sun, Ke Song, Xin Xu, Tao Fang, Lunguang YaoAbstractReleased Ag ions or/and Ag particles are believed to contribute to the cytotoxicity of Ag nanomaterials, and thus, the cytotoxicity and mechanism of Ag nanomaterials should be dynamic in water due to unfixed Ag particle:Ag+ ratios. Our recent research found that the cytotoxicity of PVP-Ag nanoparticles is attributable to Ag particles alone in 3 hr bioassays, and shifts to both Ag particles and released Ag+ in 48 hr bioassays. ...
Source: Journal of Environmental Sciences - November 10, 2019 Category: Environmental Health Source Type: research

Role of glycine on sulfuric acid-ammonia clusters formation: Transporter or participator
Publication date: Available online 9 November 2019Source: Journal of Environmental SciencesAuthor(s): Danfeng Li, Dongping Chen, Fengyi Liu, Wenliang WangAbstractGlycine (Gly) is ubiquitous in the atmosphere and plays a vital role in new particle formation (NPF). However, the potential mechanism of its on sulfuric acid (SA) - ammonia (A) clusters formation under various atmospheric conditions is still ambiguous. Herein, a (Gly)x·(SA)y·(A)z (z ≤ x + y ≤ 3) multicomponent system was investigated by using density functional theory (DFT) combined with Atmospheric Cluster Dynami...
Source: Journal of Environmental Sciences - November 10, 2019 Category: Environmental Health Source Type: research