Article
Environmental Sciences
Xiaotong Xu, Jing Kang, Jimin Shen, Shengxin Zhao, Binyuan Wang, Pengwei Yan, Qinglong Fu, Zhonglin Chen
Summary: This study analyzed the dissolved organic matter (DOM) profiles of water samples from a water source in northeastern China using high-resolution mass spectrometry (HRMS), and investigated its changes after chlorination. The study found that lignin substances were a significant proportion of DOM and chlorinated products, and were the main precursors of disinfection by-products (DBPs). Additionally, the degradation of two lignin monomers followed pseudo-first-order reaction kinetics, and the degradation rates increased with higher chlorine dosage, pH, and temperature.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Yin Qiu, Liming Wang
Summary: The study investigated the photochemical degradation of Pyridinium ionic liquids in water, revealing their prolonged half-lives in natural waters and the major contributors to their degradation. It was found that triplet stated dissolved organic matter and CO3 center dot- play significant roles in the degradation process.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Environmental Sciences
Wei Li, Kai Liu, Zhongfang Min, Jiping Li, Meng Zhang, Gregory Korshin, Jiangang Han
Summary: Antibiotics are widespread in wastewater and surface water, and their presence is a major concern. Chlorination, a crucial disinfection process used in wastewater treatment plants and waterworks, leads to the degradation of antibiotics. However, the combination of antibiotics with chlorine produces multiple transformation products (TPs), which may be more toxic than the parent compounds, but their characteristics and ecotoxicity are largely unknown.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Jinlu Feng, Xi Li, Habasi Patrick Manzi, Claude Kiki, Lifeng Lin, Jiaxing Hong, Wenzhen Zheng, Chuchu Zhang, Shengda Wang, Qiaoting Zeng, Qian Sun
Summary: This study investigated the effect of chlorine on the removal of microcystin-LR (MC-LR) from water sources. The results showed that the rate of MC-LR chlorination depended on the chlorine dose and the composition of the water source. The transformation products of MC-LR did not induce genotoxicity/mutagenicity in bacteria.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Engineering, Environmental
Shengqi Zhang, Qian Yin, Shangwei Zhang, Kyriakos Manoli, Lei Zhang, Xin Yu, Mingbao Feng
Summary: The chlorination of the anticancer drug methotrexate (MTX) in water was studied, including the kinetics, product identification, and secondary risk evaluation. The oxidation of MTX by free available chlorine followed first-order kinetics and was influenced by pH. Chlorination effectively removed MTX in different water matrices.
Article
Engineering, Environmental
Wen-Long Wang, Yu-Jia Nong, Zheng-Wei Yang, Qian-Yuan Wu, Uwe Huebner
Summary: Due to the Covid-19 pandemic, the use of biocides has increased globally, leading to increased residuals in treated wastewater. This study investigated the chlorination kinetics, transformation pathways, and toxicity evolution of two typical isothiazolinone biocides, methyl-isothiazolinone and chloro-methyl-isothiazolinone. The results showed that acidic pH and elevated Cl- concentration favored the removal of these biocides, but the elimination rate in secondary effluent was low and alternative measures may be needed to reduce their discharge into the aquatic environment.
Article
Electrochemistry
Mark Ferguson, Mohamed Najah, Frederic Banville, Mohamed Boucherit, Naresh Miriyala, Jacques Renaud, Luc Frechette, Francois Boone, Serge Ecoffey, Serge A. Charlebois
Summary: We investigated the re-entrant undercut profile resulting from Au wet etching and compared the effects of an aqua regia-based solution and a commercial iodine-iodide-based etchant. Our results show that the aqua regia solution effectively mitigates galvanic undercutting and we discuss the electrochemical origin of this mitigation.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Environmental Sciences
Veronika Klancic, Martina Gobec, Ziga Jakopin
Summary: The use of household and personal care products leads to the release of numerous chemicals into the environment, including parabens, bisphenols, UV filters, and alkylphenol ethoxylates. These chemicals can contaminate soil, water, plants, and animals. This review examines the sources and occurrence of halogenated transformation products, compares their endocrine-disrupting properties with their parent compounds, and highlights knowledge gaps in their toxicological profiles.
Article
Environmental Sciences
Adria Sunyer-Caldu, Oksana Golovko, Michal Kaczmarek, Hakan Asp, Karl -Johan Bergstrand, Ruben Gil-Solsona, Pablo Gago-Ferrero, M. Silvia Diaz-Cruz, Lutz Ahrens, Malin Hultberg
Summary: Recovering and reusing nutrients in agriculture is a challenge. Anaerobic digestion of food waste is a sustainable process that can recycle nutrients for use as fertilizers. However, the digestate may contain contaminants that pose risks to the environment and human health.
ENVIRONMENTAL POLLUTION
(2023)
Article
Environmental Sciences
Xixi Li, Guangzhu Li, Bing Chen, Weiyun Lin, Baiyu Zhang
Summary: This study established a 3D-QSAR model to predict the toxicity of SM transformation by-products, finding that 40% chlorination by-products have higher toxicity and biodegradation is effective for treating AHTN, while advanced oxidation may be the best method for treating HHCB. This research provides valuable reference data and guidance for managing SMs and other emerging contaminants.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Mengting Liu, Masao Ohashi, Yiu-Sun Hung, Kirstin Scherlach, Kenji Watanabe, Christian Hertweck, Yi Tang
Summary: Enzymes capable of halogenation of aliphatic carbons are important to synthetic and biocatalysis fields. AoiQ, a flavin-dependent halogenase, catalyzes gem-dichlorination of 1,3-diketone substrates in the biosynthesis of dichlorodiaporthin, representing the first biochemically reconstituted FDH that can halogenate an enolizable sp(3)-hybridized carbon atom.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Engineering, Chemical
Parmila Devi, Ajay K. Dalai
Summary: The study investigated the effects of breakpoint chlorination on the formation and decay of inorganic chloramines and disinfection byproducts in chlorinated brine solutions. Results showed that environmental factors such as pH, temperature, chlorine to ammonia ratio, and natural organic matter dosage influenced the speciation and decay of chloramines. Kinetics simulations were performed to study chloramine formation and decay as a function of temperature, showing a close similarity between synthetic chlorine system and chlorinated brine solution.
Article
Environmental Sciences
Chen-Yan Hu, Ji-Chen Zhang, Yi-Li Lin, Si-Cheng Ren, Ye-Ye Zhu, Cun Xiong, Qiang-Bing Wang
Summary: In this study, the factors affecting the degradation kinetics of prometryn chlorination were investigated, including solution pH, bromide and ammonium concentrations, and temperature. The results showed that the presence of bromide and the increase of temperature accelerated the degradation rate of prometryn during chlorination, while the pH significantly affected the formation and distribution of disinfection by-products (DBPs).
Article
Engineering, Environmental
Andre Luis Correa de Barros, Daniel Aparecido da Silva Rodrigues, Camila Cristina Rodrigues Ferreira da Cunha, Igor Aparecido Santana das Chagas, Daiana Rocha do Espirito Santo, Silvana de Queiroz Silva, Robson Jose de Cassia Franco Afonso
Summary: This study evaluated the degradation, mineralization, and DBPs formation of the widely used herbicide metribuzin during aqueous chlorination. The results showed that DBPs formed during chlorination were more toxic than the precursor metribuzin, with increased toxicity effects on Anemia salina nauplii. Additionally, chlorinated solutions exhibited high estrogenicity to human receptors and mutagenic and developmental toxicant effects in BLYES and Q(SAR) tests.
Article
Environmental Sciences
Manhong Miao, Bingqing Yu, Xuhua Cheng, Tianwei Hao, Yuanyuan Dou, Min Zhang, Yao Li
Summary: This study investigated the changes in physicochemical characteristics of polyethylene and thermoplastic polyurethane during chlorination, and the influence of these changes on contaminants. The findings revealed significant morphology and O-functional group changes in microplastics during chlorination. Moreover, the mechanisms controlling the chlorination treatment differed between the two types of microplastics. The research also showed that chlorination treatment enhanced the aggregation ability of microplastics in brine and their interaction with Cr(VI). These discoveries suggest that water treatment processes can alter the migration capacity of microplastics and the distribution of contaminants in the aquatic environment by affecting the adsorption of microplastics to contaminants.
ENVIRONMENTAL POLLUTION
(2023)
Article
Engineering, Environmental
Rui Tang, Henning Prommer, Shoujun Yuan, Wei Wang, Jing Sun, James Jamieson, Zhen-Hu Hu
Summary: A sulfate-mediated bioelectrochemical system was designed to enhance ROX degradation and in situ immobilization of inorganic arsenic, exhibiting a synergistic effect on HAPA degradation. This technique is promising for enhanced arsenic decontamination of organoarsenic-bearing manure/wastewater.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Green & Sustainable Science & Technology
Yan Jiang, Yizhen Zhang, Shun Wang, Zhongzhong Wang, Yanchen Liu, Zhenhu Hu, Xinmin Zhan
Summary: The study found that the co-digestion of food waste and pig manure performs better in reducing environmental impacts compared to existing practices, but there are still hotspots such as methane emissions during digestate storage, ammonia emissions during land application, and energy consumption. The global warming potential only becomes negative when the food waste proportion is over 2000 t/yr.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Engineering, Chemical
Jia Deng, Liwen Xiao, Shoujun Yuan, Wei Wang, Xinmin Zhan, Zhen-Hu Hu
Summary: In this study, CoFeNi LDH/GO composites were successfully designed and synthesized for activating peroxymonosulfate (PMS), showing effective degradation of gatifloxacin (GAT) antibiotics. Through inserting graphene oxide (GO) into the layer structure of layered double hydroxide (LDH), the surface functional groups of GO were immobilized in LDH, allowing for the continuous catalysis of the LDH/GO composites. The LDH/GO system demonstrated stable catalytic performance in removing pharmaceuticals and personal care products (PPCPs) from wastewater.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Agricultural Engineering
Chunhua He, Tingxia Liu, Hua Ou, Shoujun Yuan, Zhenhu Hu, Wei Wang
Summary: This study demonstrates a novel method to enhance the conversion rate of phenol to methane by coupling granular activated carbon and exogenous hydrogen (GAC/H2). The results show that the coupling of GAC and hydrogen significantly increased methane production compared to the control group. The enhancement of methane production was associated with changes in microbial communities, with GAC enhancing specific bacteria and hydrogen promoting methane-producing microorganisms.
BIORESOURCE TECHNOLOGY
(2021)
Article
Green & Sustainable Science & Technology
Fang Xu, Qinwei Lu, Kunpeng Li, Ting-Ting Zhu, Wei-Kang Wang, Zhen-Hu Hu
Summary: A novel magnetic mesoporous carbon (MMC) material was successfully fabricated using waste lignin and FeCl3 as precursors, showing superior chemical/physical properties and reusability. The material demonstrated potential in efficient Fenton catalysis, providing a green and sustainable strategy for the comprehensive utilization of waste lignin.
JOURNAL OF CLEANER PRODUCTION
(2021)
Review
Engineering, Environmental
Rui Tang, Yulan Wang, Shoujun Yuan, Wei Wang, Zhengbo Yue, Xinmin Zhan, Zhen-Hu Hu
Summary: Aromatic organoarsenicals used in animal feeding operations lead to arsenic contamination in livestock wastewater and manure, increasing the risk of surface water pollution. Biological wastewater treatment processes are crucial for removing these compounds. Research on organoarsenic removal and biotransformation focuses on functional microorganisms and genes, as they impact water security and microbial activity in bioreactors.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Environmental Sciences
Shasha Qi, Jinbiao Lin, Yulan Wang, Shoujun Yuan, Wei Wang, Liwen Xiao, Xinmin Zhan, Zhenhu Hu
Summary: Food wastes fermentation liquid was investigated as an external carbon source in municipal wastewater treatment for nitrogen removal, showing potential to replace commercial carbon sources with improved nitrogen removal efficiency and reduced operating costs. The laboratory and full-scale experiments demonstrated the effectiveness of using fermentation liquid to enhance denitrification in wastewater treatment plants.
Article
Engineering, Environmental
Shun Wang, Yuansheng Hu, Zhenhu Hu, Weixiang Wu, Zhongzhong Wang, Yan Jiang, Xinmin Zhan
Summary: Dry anaerobic co-digestion (AcoD) with 20% total solids content was more effective in reducing total antibiotic resistance genes (ARGs), especially aminoglycosides, multidrug, and sulfonamide resistance genes, compared to wet AcoD with 5% total solids content. Efflux pump and antibiotic deactivation resistance mechanisms of ARGs were significantly reduced by dry AcoD. Network analysis revealed significant correlations between ARGs, mobile genetic elements (MGEs), and microbial communities.
Article
Engineering, Environmental
Chunhua He, Xuesong Ren, Guoqing Xu, Zhiqiang Huang, Yulan Wang, Zhenhu Hu, Wei Wang
Summary: Phenol and ammonia are common pollutants in industrial wastewaters. The study successfully started and operated a single-stage partial nitritation /anammox reactor treating phenol-ammonia wastewater, achieving total nitrogen and COD removal efficiencies of around 73.0% and 79.5%. The anammox bacteria adapted to phenol condition and remained stable activity after 60 days of operation.
WATER ENVIRONMENT RESEARCH
(2021)
Article
Agricultural Engineering
Tingxia Liu, Hua Ou, Kuizu Su, Zhenhu Hu, Chunhua He, Wei Wang
Summary: The study utilized GAC and EH2 to enhance anaerobic digestion of BOW, and found that methane production significantly increased in the EH2/GAC group. This was possibly due to GAC promoting the enrichment of Geobacter, and EH2 altering the metabolic mechanism of Clostridium.
BIORESOURCE TECHNOLOGY
(2021)
Article
Engineering, Environmental
Rui Tang, Haiping Luo, Henning Prommer, Zhengbo Yue, Wei Wang, Kuizu Su, Zhen-Hu Hu
Summary: The extensive use of organoarsenic feed additives has led to the occurrence of organoarsenicals in livestock wastewater and anaerobic wastewater treatment systems. The long-term impact of roxarsone on Anaerobic Granular Sludge (AGS) activity has been investigated in this study, revealing a significant reduction in methane production initially, with eventual restoration. The study also found that roxarsone exposure stimulated the excretion of extracellular polymeric substances and surface spalling of AGS, while altering microbial pathways and inhibiting specific methanogen species before full restoration of methane production.
Article
Environmental Sciences
Qiang Wu, Jizhong Meng, Hang Yao, Rui Tang, Shoujun Yuan, Yulan Wang, Wei Wang, Haiping Luo, Zhen-Hu Hu
Summary: In this study, a floating TiO2/EVA photocatalyst was successfully synthesized using a simple thermal crosslinking procedure with ethylene-vinyl acetate copolymer (EVA) as the support material. The photocatalyst exhibited uniform TiO2 dispersion and high stability, leading to a significant enhancement in the degradation efficiency of Rhodamine B.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Environmental Sciences
Wentao Hu, Rui Tang, Shoujun Yuan, Miao Gong, Penghui Shi, Wei Wang, Zhen-Hu Hu
Summary: This study explores the key factors affecting the accuracy of fluorescent staining and effective measures to avoid interference using the Nile Red/DAPI co-staining method as an example. The study identifies high background microplastic contamination in lab waters, glass fiber filter membrane, and glassware as dominant factors affecting microplastic quantification. Simple filtration and burning at a high temperature are effective in removing background microplastics. The study also suggests setting H2O2 pretreatment and exposure time to avoid erroneous microplastic assessment.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Environmental
Chunhua He, Bing Zhang, Hua Ou, Zhenghu Hu, Wei Wang
Summary: The study found that the combination of salinity and humic acid had a negative impact on the Anammox process, possibly due to the reduction of ETS activity. Additionally, the coexistence of salinity and humic acid resulted in a decrease in functional groups, which in turn affected the ETS activity of the Anammox sludge.
ENVIRONMENTAL ENGINEERING SCIENCE
(2021)