Article
Engineering, Environmental
Jingquan Wang, Min Zheng, Erdeng Du, Wenhai Chu, Hongguang Guo
Summary: Ultraviolet (UV)/chlor(am)ine processes are emerging AOPs for water decontamination. This study demonstrates the potential of UV/NaDCC as a new AOP, which can produce more hydroxyl radicals and reactive chlorine species and achieve higher oxidation efficiency than conventional AOPs.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Environmental Sciences
Xiaoci Li, Yan Cai, Junhe Lu, Jean-Marc Chovelon, Jing Chen, Canlan Jiang, Yuefei Ji
Summary: This study compared the removal of 4-nitrophenol and the generation of chlorinated byproducts in HOCl and UV/HOCl treatment processes. The results showed that UV/HOCl was more effective in removing 4-nitrophenol and produced fewer chlorinated byproducts. The study provides insights into the transformation of nitrophenolic compounds and the formation potential of chlorinated byproducts in HOCl and UV/HOCl disinfection processes.
Article
Environmental Sciences
Da Sheng, Shumin Zhu, Wei Zhang, Lingjun Bu, Yangtao Wu, Jue Wang, Shiqing Zhou
Summary: The study revealed that Cu2+ can catalyze the decomposition of NH2Cl, thereby promoting the degradation of trace pollutants (such as CBZ) in WDS. The degradation of CBZ in the Cu2+/NH2Cl system is pH-dependent, with higher Cu2+ concentrations increasing the removal of CBZ. Additionally, the presence of Cu2+ was found to increase the cytotoxicity and genotoxicity of disinfection byproducts formed during chloramination.
Article
Engineering, Environmental
Chenyan Hu, Cun Xiong, Yi-Li Lin, Yeye Zhu, Qiangbing Wang, Lin Xu, Dandan Huang
Summary: The degradation kinetic model and pathways of a UV filter, PBSA, during UV/chlorination were investigated. The efficient degradation of PBSA was observed under UV/chlorination conditions and followed pseudo-first order kinetics. The contribution of radicals and the effect of different factors on PBSA degradation were determined. The study also proposed transformation pathways and evaluated the formation of chlorinated disinfection by-products. Overall, the study provides insights into the efficiency, mechanism, and safety of removing PBSA using UV/chlorination.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Environmental Sciences
Anhong Cai, Jing Deng, Cheng Ye, Tianxin Zhu, Xiao Ling, Shuwen Shen, Hongguang Guo, Xueyan Li
Summary: In this study, the combined use of UV-LED275 and FeCl3 was found to be effective in eliminating DEET in water, with the UVLED275/FeCl3 system showing the best removal efficiency at initial pH 3.5. DEET degradation followed pseudo-first-order kinetics, with hydroxyl radicals and superoxide radicals playing a major role in the process. Increasing FeCl3 dosage was beneficial to degradation, and the process was pH-dependent, with degradation increasing at lower pH levels and being suppressed at higher pH levels. Various factors such as NO3-, humic acid, HCO3-, and SO42- had different effects on DEET degradation.
Article
Engineering, Environmental
Jue Wang, Yangtao Wu, Lingjun Bu, Shumin Zhu, Weiqiu Zhang, Shiqing Zhou, Naiyun Gao
Summary: Using chlorine dioxide as a disinfectant generates chlorite as a byproduct. UV photolysis after ClO2 disinfection is effective in eliminating chlorite and Contaminants of Emerging Concern (CECs). The impact of water matrix conditions and ClO2 dosage on the process were investigated, revealing the role of hydroxyl radicals and reactive chlorine species in CEC degradation.
Article
Engineering, Environmental
He Zhao, Ching-Hua Huang, Chen Zhong, Penghui Du, Peizhe Sun
Summary: This study investigated the formation of THMs from HBQs during chlorine-only and UV/chlorine processes. The results showed that UV and hydroxylation played important roles in promoting THMs formation. Additionally, the hydroxylation reaction and the formation of CHCl3 increased at higher pH.
FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING
(2022)
Article
Engineering, Environmental
Kun Wang, Chue Shang, Ran Yin, Yingying Xiang
Summary: This study quantitatively evaluated the generation of reactive nitrogen species (RNS) in the UV/NHCl2 process and investigated their role in micropollutant transformation. The RNS contributed greatly to the degradation of N,N-diethyl-3-methylbenzamide (DEET) and led to the formation of seven nitrogenous byproducts with the incorporation of nitrogen originating from the RNS. These findings are essential for understanding the contribution of the UV/NHCl2 process in potable reuse scenarios.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Xinran Zhang, Jiaxin Zhai, Yu Lei, Huang Huang, Pengfei Ren, Dimitra Lambropoulou, Xin Yang
Summary: This study found that NH2Cl, instead of nitrogenous matters in waters, was the predominant nitrogen source of TCNM during UV/NH2Cl treatment. Phenol derivatives with specific substituents and electron-withdrawing groups facilitated the formation of TCNM precursors. The formation mechanisms of TCNM and its main precursors were revealed through the study of a representative phenolic compound.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Engineering, Environmental
Lei Wang, Yi Chen, Baiyang Chen, Jie Yang
Summary: This study showed that reduced oxygen mainly generates center dot OH, and photolysis products can trigger the formation of H2O2 under 254 nm UV. Additionally, evidence of direct photolysis-induced indirect photolysis phenomenon was presented, along with a comprehensive methodology to identify the presence and sources of radicals.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Environmental Sciences
Huan Wu, Kunling Long, Yujie Sha, Du Lu, Ying Xia, Yan Mo, Qiyuan Yang, Weiwei Zheng, Mengting Yang, Xiao Wei
Summary: This study investigated the distribution and formation of halobenzoquinones in drinking water in China, comparing their cytotoxicity and genotoxicity, and analyzing the correlation of their toxicity with physicochemical parameters. It was found that the concentration of HBQs was influenced by water treatment methods and water quality parameters, with certain factors being negatively correlated with the cytotoxicity of the compounds.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Jiayan Zhao, Liangliang Han, Suo Tan, Wenhai Chu, Huiyu Dong, Qing Zhou, Yang Pan
Summary: This study investigated the effects of boiling on different types of disinfection byproducts (DBPs) in tap water. The results showed that boiling significantly reduced the concentration of aliphatic DBPs, while the effect on aromatic DBPs was inconsistent. Boiling also substantially reduced the cytotoxicity of tap water samples, and the reduction in toxicity was correlated with the decrease of halogenated DBPs.
Article
Engineering, Environmental
Jingxuan Yang, Dongxu Qu, Jue Wang, Yangtao Wu, Lingjun Bu, Yuanxi Huang, Shiqing Zhou
Summary: UV/NH2Br process has shown effective degradation of CECs through the generation of reactive bromine and nitrogen species, as well as hydroxyl radicals. The degradation efficiency of different CECs is influenced by various factors, such as NH2Br dosage, pH value, and concentrations of other anions in the solution.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Environmental Sciences
Yaqian Wang, Huihui Liu, Xianhai Yang, Lianjun Wang
Summary: This study investigated the acute toxicity and potential ecological risk of wastewater-derived disinfection byproducts (DBPs) on Gobiocypris rarus. The results showed that the toxicity of phenolic DBPs varied depending on the compound and the environmental concentration. Some phenolic DBPs exhibited high ecological risk. Further research is needed to explore the potential harmful effects of these high-risk compounds and implement appropriate measures to mitigate their ecological risk.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Chao Fang, Xinmiao Luan, Feiyang Ao, Xingyu Wang, Shunke Ding, Zhenqi Du, Shushen Liu, Ruibao Jia, Wenhai Chu
Summary: In this study, it was discovered that the level of TOX in chlorinated waters had been significantly underestimated under common analytical conditions. The addition of quenching agent sodium thiosulfate resulted in a two-phase decomposition pattern of total organic chlorine and total organic bromine, indicating the important toxicological significance of the DBPs responsible for TOX decomposition. Nontarget analysis using high-resolution mass spectrometry revealed the molecular formulas for the decomposed TOX, and it was found that the level of unknown TOX in chlorinated waters was considerably higher than previously thought.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Lu Peng, Hai Liu, Wen-Long Wang, Zi-Bin Xu, Xin-Ye Ni, Yin-Hu Wu, Qian-Yuan Wu, Hong-Ying Hu
CHEMICAL ENGINEERING JOURNAL
(2020)
Article
Environmental Sciences
Yuting Zhan, Bo Yang, Nian Hong, Yingjie Guan, An Liu, Ye Du, Qianyuan Wu, Yuntao Guan
ENVIRONMENTAL POLLUTION
(2020)
Article
Engineering, Environmental
Yao Lu, Chao Wang, Xin-Yang Zhang, Zhi-Wei Wang, Zhi-Min Song, Ye Du, Qing Hu, Qian-Yuan Wu, Hong-Ying Hu
Summary: The study found that during ozonation in the presence of bromide and ammonia, the formation of nitrogenous byproducts may lead to increased toxicity. Using UPLC-HRMS and an isotope labeling strategy, four newly formed nitrogenous byproducts were detected. This highlights the importance of paying attention to nitrogenous byproducts during ozonation in the presence of bromide and ammonia.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Engineering, Environmental
Ye Du, Wen-Long Wang, Da-Yin Zhang, Tian-Hui Zhou, Min-Yong Lee, Qian-Yuan Wu, Hong-Ying Hu, Zhi-Ming He, Tian-Yin Huang
JOURNAL OF HAZARDOUS MATERIALS
(2020)
Article
Engineering, Environmental
Xinzheng Li, Zhiming Li, Zhihui Xing, Zhimin Song, Bei Ye, Zhengming Wang, Qianyuan Wu
Summary: In this study, LED photocatalysis using mixed rutile and anatase phase TiO2 was shown to effectively remove CMIT and MIT, with .OH free radicals playing a primary role in the oxidation, hydrolysis, and chain growth reactions. Different light conditions and catalyst dosages significantly influenced the degradation efficiency.
FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING
(2021)
Article
Engineering, Environmental
Xin-Yang Zhang, Yao Lu, Ye Du, Wen-Long Wang, Lu-Lin Yang, Qian-Yuan Wu
Summary: This study developed a new analytical method for identifying new brominated disinfection byproducts (Br-DBPs) during ozonation, detecting over 1304 DBPs in an ozonated phenylalanine solution. The study confirmed and tentatively proposed structures for 12 Br-DBPs, including 8 newly reported compounds, showing higher toxicities than bromate. The method provides a powerful technique for analyzing complex compounds and identifying byproducts in future studies.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Environmental Sciences
Min-Yong Lee, Wen-Long Wang, Ye Du, Tae-Wan Jeon, Sun-Kyung Shin, Qian-Yuan Wu, Guo-Hua Dao, Hong-Ying Hu
Summary: The study evaluated the toxicity of ROC in municipal wastewater reclamation treatment, which contains harmful intermediates and transformation products after different UV synergistic oxidation processes. The correlation between TOX and cytotoxicity proved to be a more acceptable method for predicting toxicity in ROC.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Nan Huang, Wen-Long Wang, Zi-Bin Xu, Bei Ye, Zi-Fan Liang, Min-Yong Lee, Qian-Yuan Wu, Hong-Ying Hu
Summary: The study found that monochloramine induced the formation of reactive species during the ozonation process of CMIT, significantly promoting its degradation. Hydroxyl radicals played a major role in CMIT degradation during the ozone/chloramine synergistic oxidation process, with a much higher exposure compared to ozonation alone. The mechanisms of reactions between ozone and chloramine were proposed to involve oxygen transfer reactions and the generation of hydroxyl radicals through different pathways. Chloramine dosage and pH were identified as crucial factors affecting the efficiency of the degradation process. The degradation pathway of CMIT during ozone/chloramine synergistic oxidation included oxidation of sulfur atoms and substitution of chlorine groups by hydroxyl groups, leading to lower toxicity in the transformation products.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Review
Engineering, Environmental
Zhi-Min Song, Ya-Lan Xu, Jun-Kun Liang, Lu Peng, Xin-Yang Zhang, Ye Du, Yao Lu, Xin-Zheng Li, Qian-Yuan Wu, Yun-Tao Guan
Summary: The presence of trace organic contaminants in wastewater poses concerns for human health. Ozonation and UV/H2O2 are commonly used for their removal, but real-time monitoring of their abatement efficiency is challenging due to the low concentrations of the contaminants. Researchers have turned to using various surrogates to monitor the attenuation of TrOCs during AOPs.
Article
Engineering, Environmental
Yao Lu, Zhi-Min Song, Chao Wang, Jun-Kun Liang, Nan Xu, Qing Hu, Qian-Yuan Wu
Summary: Chlorination can lead to the formation of hazardous chlorinated disinfection byproducts. A study identified precursors of toxic Cl-DBPs and developed a halogen extraction code to accurately detect and identify them. The computational prediction showed that the newly identified Cl-DBPs have high toxicity levels.
Article
Engineering, Environmental
Yao Lu, Zhi-Min Song, Chao Wang, Jun-Kun Liang, Qing Hu, Qian-Yuan Wu
Summary: The study found that natural organic matter may lead to the formation of chlorinated disinfection byproducts (ClDBPs) during water treatment, with many of these compounds still unidentified. A total of 189 ClDBPs were detected during chlorination, with 20 compounds being reported for the first time, and chlorinated carboxylic acids are likely common ClDBPs. Additionally, toxicity prediction indicated that many chlorinated carboxylic acids may have high toxicity.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Environmental Sciences
Boqiang Li, Baiyang Chen, Shuwei Chen, Mengting Yang, Qianyuan Wu
Summary: The study evaluated the removal of chlorinated haloacetaldehydes in drinking water by household heating devices. The results showed that boiling water to 100 degrees C was not very efficient in removing HALs without chlorine, but HALs were readily transformed when chlorine was present.
Article
Environmental Sciences
Yao Lu, Zhi-Min Song, Chao Wang, Jun-Kun Liang, Qing Hu, Qian-Yuan Wu
Summary: This study extended and modified a halogen extraction code to successfully detect 127 brominated disinfection byproducts from a natural organic matter solution. Kendrick mass defect analysis and structural characterization identified new brominated carboxylic acid structures, which may have high toxic potencies.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Chemistry, Physical
Qianyuan Wu, Jin Wang, Zhiwei Wang, Yalan Xu, Zhihui Xing, Xinyang Zhang, Yuntao Guan, Guangfu Liao, Xinzheng Li
JOURNAL OF MATERIALS CHEMISTRY A
(2020)
Article
Engineering, Environmental
Rong-Gui Zhu, Chang-Gui Pan, Feng-Jiao Peng, Chao-Yang Zhou, Jun-Jie Hu, Kefu Yu
Summary: This comprehensive survey investigated the occurrence, bioaccumulation, and trophic magnification of parabens and their metabolite 4-HB in a marine food web. Results showed that parabens were the predominant pollutants in marine organisms, with significant bioaccumulation from sediments. The estimated trophic magnification factor indicated biomagnification for MeP and trophic dilution for 4-HB. Overall, the risks for humans consuming marine organisms were found to be low.
Article
Engineering, Environmental
Andres F. Torres-Franco, Deborah Leroy-Freitas, Cristina Martinez-Fraile, Elisa Rodriguez, Pedro A. Garcia-Encina, Raul Munoz
Summary: Anaerobic and microalgae-based technologies have emerged as sustainable alternatives for municipal wastewater treatment. However, the presence of viruses in the treated wastewater is a major concern for reuse applications. This study assessed the ability of these technologies to reduce viruses during secondary wastewater treatment. The results showed that all technologies were effective in reducing the concentration of viruses, with microalgae-based treatment exhibiting the highest potential for reducing the disinfection requirements of treated wastewater.
Article
Engineering, Environmental
Young Gwang Kim, Sae Yun Kwon, Spencer J. Washburn, Scott C. Brooks, Ji Won Yoon, Lucien Besnard
Summary: The study uses Hg isotope ratios to identify the sources and exposure pathways of mercury in bivalves, finding that dissolved Hg phases in the water column are the primary source and exposure pathway to bivalves. This provides new insights into using bivalves as bioindicators for sediment quality monitoring.
Article
Engineering, Environmental
Hui Geng, Ying Xu, Rui Liu, Dianhai Yang, Xiaohu Dai
Summary: This study investigates the effect of cation exchange resin (CER) on the sequential recovery of hydrogen and methane from anaerobic digestion (AD) and the corresponding mechanisms. The results show that CER can simultaneously enhance the production of hydrogen and methane by promoting the solubilisation, hydrolysis, and acidification of organic matter. Additionally, CER facilitates effective contact between bacteria and organic particulates and reduces the energy barrier for mass transfer during methane production. The study also reveals changes in the microbial community structure and metagenomics during the AD process.
Article
Engineering, Environmental
Xiaojing Lin, Zhan Jin, Shunfeng Jiang, Zhiquan Wang, Suqing Wu, Ke Bei, Min Zhao, Xiangyong Zheng
Summary: Dehumidification combined with addition of absorbent resin supplement (ARS) was used to achieve rapid evaporation of non-pretreated urine, resulting in high water evaporation efficiency and nutrient recovery.
Article
Engineering, Environmental
Yangli Che, Chaoran Lin, Shen Li, Jiao Liu, Longhai Zhu, Shilei Yu, Nan Wang, Haoshuai Li, Mutai Bao, Yang Zhou, Tonghao Si, Rui Bao
Summary: Hydrodynamic processes play a crucial role in the transmission of sediments, microbial assembly, and organic carbon redistribution in the ocean. Through experiments and analysis, we found that hydrodynamics shape the assembly of microbial communities and control the redistribution of different sourced organic carbon, thereby influencing microbial-mediated biogeochemical transformation.
Article
Engineering, Environmental
Chao Chen, Yu Yang, Nigel J. D. Graham, Zhenyu Li, Xingtao Yang, Zhining Wang, Nadia Farhat, Johannes S. Vrouwenvelder, Li -an Hou
Summary: The fouling of seawater reverse osmosis membranes is a persistent challenge in desalination. This study monitored the operational performance of a desalination plant for 7 years and the fouling development in different areas of membrane modules. The findings showed that operational performance declined over time and fouling mainly occurred at the feed side of the modules, with the highest microbial diversity. Keystone species like Chloroflexi and Planctomycetes played an important role in maintaining community structure and biofilm maturation. Polysaccharides, soluble microbial products, marine humic acid-like substances, and inorganic substances contributed to fouling. Overall, biofouling had a significant impact on membrane fouling after 7 years of operation.
Article
Engineering, Environmental
Dan Li, Jieyi Sun, Yibo Fu, Wentao Hong, Heli Wang, Qian Yang, Junhong Wu, Sen Yang, Jianhui Xu, Yunfei Zhang, Yirong Deng, Yin Zhong, Ping'an Peng
Summary: Sulfidation-oxidation treatment of magnetite (Fe3O4) enhances the production of dark center dot OH, which can efficiently degrade dissolved organic matter (DOM) and accelerate carbon cycling.
Article
Engineering, Environmental
Cheng Yu, Kaijun Wang, Kaiyuan Zhang, Ruiyang Liu, Pingping Zheng
Summary: This study implemented a microaerobic-aerobic configuration in a full-scale municipal wastewater treatment facility and investigated the effects on sludge characteristics, pollutant removal, microbial community, and granulation mechanisms. The results showed successful transition from flocculent-activated sludge to well-defined AGS after two months of operation. The primary pathways for pollutant removal were simultaneous nitrification, denitrification, and phosphorus removal. Moreover, the incorporation of internal separators induced shifts in the flow pattern, which promoted granulation.
Article
Engineering, Environmental
Zhe Zhang, Shaoyang Hu, Guangrong Sun, Wei Wang
Summary: Halogenated aromatic disinfection byproducts (DBPs), such as halogenated phenols, have garnered widespread attention due to their high toxicity and prevalence. This study reports on the analysis, occurrence, and cytotoxicity of a group of emerging halogenated aromatic DBPs, known as halogenated polyhydroxyphenols (HPPs), in drinking water.
Article
Engineering, Environmental
Shengyue Chen, Jinliang Huang, Peng Wang, Xi Tang, Zhenyu Zhang
Summary: Accurate prediction of river water quality is crucial for sustainable water management. This study introduces wavelet analysis and transfer learning techniques to assist LSTM modeling, proposing a newly coupled modeling approach that improves short-term prediction of river water quality.
Article
Engineering, Environmental
Bang Du, Xinmin Zhan, Piet N. L. Lens, Yifeng Zhang, Guangxue Wu
Summary: Efficient anaerobic digestion relies on the cooperation of different microorganisms with different metabolic pathways. This study investigated the effects of different operational modes and the addition of powdered activated carbon (PAC) on ethanol metabolic pathways. The results showed that the SBR mode and the presence of CO2 facilitated ethanol metabolism towards propionate production, while the CFR mode with extended solids retention time enriched Geobacter. Adjusting operational modes and PAC addition can modulate anaerobic ethanol metabolism and enrich Geobacter.
Article
Engineering, Environmental
Wanfa Wang, Si-Liang Li, Jun Zhong, Yuanbi Yi, Fujun Yue, Zenglei Han, Qixin Wu, Ding He, Cong-Qiang Liu
Summary: This study compares the carbon biogeochemical processes in karst and non-karst regions within large thermal stratified river-reservoir systems. The results demonstrate that karst reservoirs have a reduced potential for carbon emissions and highlight the importance of considering geologic settings to improve accuracy in regional and global CO2 emission estimates.
Article
Engineering, Environmental
Chunxia Jiang, Zelong Zhao, Dong Zhu, Xiong Pan, Yuyi Yang
Summary: This study analyzed the occurrence and distribution of antibiotic resistance genes (ARGs) in different environmental media of the Yangtze River using metagenomics. Core resistome dominated by multidrug resistance genes was found in all samples, while rare resistome dominated by various resistance genes was more prevalent in plasmids. Specific bacteria were identified as hosts for both core and rare resistomes, with high clinical concern ARGs found in the rare resistome. Particle-associated environment provided the most ideal conditions for resistome hosts. This study provided insights into the genetic locations of ARGs and the community assembly mechanisms of ARG hosts in freshwater environments.
Article
Engineering, Environmental
Yu Zhang, Yongtao He, Linchun Jia, Lei Xu, Zheng Wang, Yueling He, Ling Xiong, Xumeng Lin, Hong Chen, Gang Xue
Summary: By synergizing organic carbon source, thiosulfate, and zero-valent iron, efficient mixotrophic denitrification of oligotrophic secondary effluent can be achieved. Thiosulfate plays a vital role in promoting TN removal efficiency, while corrosion of Fe0 releases OH- to neutralize H+ from thiosulfate-driven denitrification, creating a suitable environment for denitrification. The coordination of thiosulfate and Fe0 maintains the dominance of Thiobacillus for denitrification.
