Article
Engineering, Environmental
Irina Shulga, Parmila Devi, Ajay. K. Dalai
Summary: The study found that the concentration and speciation of chloramines depend strongly on solution pH and chlorine to ammonia molar ratios. Among the chloramines, NCl3 showed the fastest depletion with a quantum yield of 2.16 mol E-1. Kinetics study showed that the rate of photodecay and quantum yield of NCl3 was 8-times and 13-times higher than NHCl2 and NH2Cl, respectively.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Engineering, Environmental
Bryan Liu, Lauren Mullen, Emma M. Payne, Karl G. Linden
Summary: Krypton chloride (KrCl*) excimer ultraviolet (UV) light may offer advantages over conventional low-pressure (LP) UV for contaminant degradation. The authors investigated the direct and indirect photolysis as well as UV/hydrogen peroxide-driven advanced oxidation (AOP) of two chemical contaminants in different water samples using KrCl* and 254nm, 222nm UV sources. The results showed that the 222nm excimer lamps significantly improved the degradation of contaminants compared to the conventional 254nm LPUV. Rating: 8/10.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Analytical
Yinghao Xu, Sirui Wu, Zhenpeng Cui, Wei Dai, Yang Fan, Wangsuo Wu, Peng Chen, Duoqiang Pan
Summary: The effects of solvents, pH, and concentration on the photolysis of CH3I were investigated. It was found that CH3I undergoes faster photolysis in aqueous solution and produces I-2 and I-3(-).
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2023)
Article
Green & Sustainable Science & Technology
Shuying Dong, Xuanxuan Yan, Yiying Yue, Wen Li, Wuyue Luo, Yuqing Wang, Jianhui Sun, Yifan Li, Menglin Liu, Maohong Fan
Summary: This study investigates the effects of H2O2 concentration and light source on the physicochemical properties of polystyrene microplastics before and after photoaging treatment. The results show that the UV/H2O2 system significantly alters the polystyrene and the fragmentation follows an initial-fast and then-slow trend. Direct photolysis dominates at low H2O2 concentrations or in the early aging stage, while indirect photolysis gradually takes over with increased H2O2 concentration or aging degree.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Chemistry, Physical
Xi-Zhi Niu, Richard D. Pepel, Rodrigo Paniego, Jim A. Field, Jon Chorover, Leif Abrell, A. Eduardo Saez, Reyes Sierra-Alvarez
Summary: Onium salts, commonly used as photoacid generators in the semiconductor industry, are facing increasing regulatory scrutiny due to their potential hazards. This study investigated the fate of four representative sulfonium PAGs under irradiation, revealing rapid reactions and the formation of multiple photoproducts. The results provide insight on the environmental impact of PAGs and can help predict residual levels and identify photoproducts in effluents from semiconductor fabrication facilities.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2021)
Review
Engineering, Environmental
Renjie Pan, Tian-Yang Zhang, Huan He, Zheng-Xiong Zheng, Zheng-Yu Dong, Heng-Xuan Zhao, Meng-Yuan Xu, Zhen-Ning Luo, Chen-Yan Hu, Yu-Lin Tang, Mohamed Gamal El-Din, Bin Xu
Summary: This review provides a comprehensive overview of the occurrences, characteristics, analysis methods, and control strategies of mixed chlorine/chloramines in drinking water distribution systems. It highlights the challenges posed by mixed chlorine/chloramine species, such as accelerated pipeline corrosions, increased risks of disinfection by-products, off-flavors in drinking water, and bio-instability issues. The review recommends three promising strategies for alleviating the problems caused by mixed chlorine/chloramines and discusses future research directions.
Article
Engineering, Environmental
Jordin Metz, Pengxiao Zuo, Bo Wang, Michael S. Wong, Pedro J. J. Alvarez
Summary: Combining ultraviolet light and chlorine can enhance the degradation of perfluorooctanoic acid (PFOA), a type of per- and polyfluoroalkyl substance (PFAS). This method not only increases the removal rate of PFOA, but also generates a significant amount of fluoride. Radical scavenger tests confirmed the important role of Cl· and Cl-2(·) in the degradation process.
ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS
(2022)
Article
Engineering, Environmental
Lu Chen, Hongchao Li, Jieshu Qian
Summary: The degradation of roxarsone (ROX) via UV-based advanced oxidation processes (AOPs) was investigated, with UV/PDS being the most effective in removing ROX and UV/H2O2 being the most effective in reducing total organic carbon (TOC). The degradation of ROX follows a pseudo-first-order kinetics model, with a significant enhancement observed at pH 11.0 in UV/PMS process.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Construction & Building Technology
H. Proulx, M. Debia, S. Halle
Summary: Trichloramine (NCl3), a disinfection by-product (DBP), is formed in chlorinated swimming pool water and can cause respiratory illnesses when inhaled. This study investigates the effects of adding extraction vents at deck level in a swimming pool in Montreal on NCl3 concentrations. Numerical simulations reveal that the position of these vents can either lead to the accumulation or reduction of NCl3, with the most significant reduction achieved when the vents are placed on the side where low level air supplied grills are located. The findings emphasize the importance of numerically assessing airflow patterns above the water and deck before determining the position of these deck level extraction vents.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Engineering, Environmental
Shanshan Zheng, He Ji, Wenlei Qin, Chunyan Chen, Zihao Wu, Kaiheng Guo, Wenrui Wei, Wanqian Guo, Jingyun Fang
Summary: This study investigated the mechanism of UV photolysis of ClO2- and the production of reactive species. It was found that UV photolysis primarily transforms ClO2- to ClO2 and then to HOCl/OCl-, ClO3-, and Cl-. Both ClO2 and HOCl/OCl- are major reactive chlorine species. Additionally, hydroxyl radical (HO·) and chlorine atom (Cl·) are also formed.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Engineering, Environmental
E. Mackey, R. Hofmann, A. Festger, C. Vanyo, N. Moore, T. Chen, C. Wang, L. Taylor-Edmonds, S. A. Andrews
Summary: This paper presents the findings of a recent study conducted for the Water Research Foundation and the State of California, offering guidance on UV-chlorine advanced oxidation for potable water reuse. The study discusses the fundamentals of UV-chlorine advanced oxidation and shares lessons learned from early adopters of this technology. Key highlights include the significant impact of ammonia and chloramines on UV-chlorine treatment, challenges in predicting UV-chlorine performance due to complex photochemistry, and the importance of monitoring potential byproducts and transformation products for potable water reuse.
Article
Engineering, Environmental
Yinqiao Zhang, Juhong Zhan, Bin Wang, Jun Huang, Shubo Deng, Gang Yu, Sridhar Komarneni, Yujue Wang
Summary: This research evaluated the combination of UV irradiation and electrochemical processes for micropollutant abatement in water treatment, finding that the divided E-UV/Cl-2/H2O2 process was more effective and energy-efficient for removing micropollutants. The study highlights the potential synergistic effects of combining UV and electrochemical methods in different configurations for decentralized water treatment.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Mojtaba Qanbarzadeh, Laura DiGiacomo, Ehsan Bouteh, Eman Z. Z. Alhamdan, Marc M. M. Mason, Bo Wang, Michael S. S. Wong, Ezra L. L. Cates
Summary: Hexagonal boron nitride (hBN) has been found to be more efficient than other catalysts in photocatalytic degradation of per-/polyfluoroalkyl substances (PFAS), especially at environmentally relevant concentrations. The strong performance of hBN under realistic water conditions suggests its potential as a treatment tool for PFAS contamination.
ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS
(2023)
Article
Astronomy & Astrophysics
Jia-Jian Zhao, Yi-Fan Zhang, Tian-Lei Zhao, Han Li, Qi-Zhi Yao, Sheng-Quan Fu, Gen-Tao Zhou
Summary: One of the objectives in the exploration of Mars is to determine if the planet has ever hosted life. Biogenic compounds, particularly biominerals, are believed to be biomarkers in Raman-assisted remote sensing missions. This study successfully achieved tetragonal bipyramidal weddellite, a type of calcium oxalate, through UV-photolysis of pyruvic acid. The formation of calcium oxalate by the photolysis of abiological organic compounds may provide a new abiotic pathway and needs to be considered in astrobiological investigations.
Article
Chemistry, Physical
Ping Li, Pu Ge, Senwen Ping, Wenting Lin, Xiaohan Zhang, Chaohai Wei, Yuan Ren
Summary: This study investigated the ultraviolet photodegradation of asthma drug salmeterol (SX) and its influencing factors. The results showed that the photolysis of SX followed a pseudo-first order kinetic reaction, with O-1(2) dominating the process. Factors such as temperature, pH, and HCO3- concentration were found to accelerate SX photolysis, while the presence of NO3-, Cl-, and Fulvic acid also affected the process. Additionally, the toxicity of the final reaction system was reduced through ultraviolet irradiation.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2021)
Article
Engineering, Environmental
Carsten Prasse, Urs von Gunten, David L. Sedlak
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2020)
Review
Engineering, Environmental
Jaesang Lee, Urs von Gunten, Jae-Hong Kim
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2020)
Article
Engineering, Environmental
Eva M. Rodriguez, Urs von Gunten
Article
Engineering, Environmental
Christina K. Remucal, Elisabeth Salhi, Nicolas Walpen, Urs von Gunten
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2020)
Article
Engineering, Environmental
Jaedon Shin, Yunho Lee, Urs von Gunten
Article
Engineering, Environmental
Karin Kiefer, Tobias Bader, Nora Minas, Elisabeth Salhi, Elisabeth M-L Janssen, Urs von Gunten, Juliane Hollender
Article
Engineering, Environmental
Frank Leresche, Lucie Ludvikova, Dominik Heger, Urs von Gunten, Silvio Canonica
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2020)
Article
Engineering, Environmental
Stephanie C. Remke, Urs von Gunten, Silvio Canonica
Summary: The presence of long-lived photooxidants (LLPO) in dissolved organic matter (DOM) may lead to an acceleration of the DOM-photosensitized transformation of electron-rich target compounds, resulting in a significant enhancement of the reaction rate constant.
Article
Engineering, Environmental
Jannis Wenk, Cornelia Graf, Michael Aeschbacher, Michael Sander, Silvio Canonica
Summary: This study found that dissolved organic matter (DOM) has an impact on the phototransformation kinetics of contaminants in water, with its inhibitory effect increasing as the pH value rises.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Editorial Material
Engineering, Environmental
Tom Bond, Wenhai Chu, Urs von Gunten, Maria Jose Farre
ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY
(2020)
Article
Engineering, Environmental
Tony Merle, Detlef R. U. Knappe, Wouter Pronk, Bernadette Vogler, Juliane Hollender, Urs von Gunten
ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY
(2020)
Article
Engineering, Environmental
Daniel Stalter, Elissa O'Malley, Urs von Gunten, Beate Escher
ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY
(2020)
Article
Engineering, Environmental
Margaux Voumard, Leonardo Venturelli, Myriam Borgatta, Antony Croxatto, Sandor Kasas, Giovanni Dietler, Florian Breider, Urs von Gunten
ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY
(2020)
Article
Engineering, Environmental
Agnes Tekle-Roettering, Sungeun Lim, Erika Reisz, Holger Lutze, Mohammad Sajjad Abdighahroudi, Sarah Willach, Winfried Schmidt, Peter R. Tentscher, Daniel Rentsch, Christa S. McArdell, Torsten C. Schmidt, Urs von Gunten
ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY
(2020)
Article
Engineering, Environmental
Valentin Rouge, Urs von Gunten, Mariette Lafont de Sentenac, Massimiliano Massi, Phillip J. Wright, Jean-Philippe Croue, Sebastien Allard
ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY
(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.
