Article
Engineering, Environmental
Mohammadreza Moeini, Lina Sela, Ahmad F. Taha, Ahmed A. Abokifa
Summary: Chlorine is widely used as a disinfectant in drinking water treatment and distribution systems globally. The optimization of chlorine dosage and scheduling in the distribution network is crucial to ensure water quality. This study introduces Bayesian optimization as a novel approach to optimize water quality in water distribution networks. The performance of different Bayesian optimization methods, including different acquisition functions and covariance kernels, was comprehensively analyzed. The results highlight the importance of choosing the appropriate acquisition function for optimization performance.
Article
Engineering, Environmental
Nicholas J. P. Wawryk, Guang Huang, Caley Craven, Junlang Qiu, Lindsay K. Jmaiff Blackstock, Xing-Fang Li
Summary: The study found that APM and sweeteners containing APM can react with residual chlorine in tap water, resulting in the formation of eight new disinfection byproducts (DBPs) and 2,6-dichloro-1,4-benzoquinone (DCBQ). These DBPs were also detected in tea containing APM. These results suggest that APM sweetened beverages could be a potential source of unintended exposure to emerging DBPs.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Review
Environmental Sciences
Xue Li, Zhijing Zhao, Zheng Qu, Xinyu Li, Zengli Zhang, Xiaojun Liang, Jingsi Chen, Jiafu Li
Summary: Disinfection by-products (DBPs) are common organic contaminants in tap water and have raised wide concern due to their toxic, cytotoxic, and carcinogenic properties. Traditional quenching agents like ascorbic acid and sodium thiosulfate can cause varying degrees of DBPs degradation, while emerging quenchers like NAC and GSH show promise as ideal chlorine quenchers for organic DBPs. Sodium sulfite has been proven to be the ideal quencher for inorganic DBPs. This comprehensive review provides insights into the effects of traditional and emerging chlorine quenchers on different types of DBPs.
Article
Environmental Sciences
Pubin Liao, Tuqiao Zhang, Lei Fang, Rongrong Jiang, Guojian Wu
Summary: This study investigated the decay of free chlorine and transformation of disinfection by-products (DBPs) under booster chlorination conditions in a pilot-scale water distribution system. The results showed that chlorine decay and the generation of DBPs were significantly increased in the water distribution system. THMs, HAAs, and DCAN all showed an initial increase followed by a continuous decline after booster chlorination, with different peak times.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Shijun Zhu, Huiming Zheng, Huihong Sun, Junping Liu, Xiaoyan Ma, Xueyan Li, Qingsong Li, Andrea M. Dietrich
Summary: Based on a one-year field investigation and simulated experiments, this study examined the characteristics of disinfection by-products (DBPs) in a large scale water distribution system (LSWDS) and their correlation with booster chlorination. The findings showed a strong relationship between residual chlorine and DBPs, with a significant increase in DBP formation after booster chlorination. The study also demonstrated that reducing the ratio of primary to secondary chlorination dosage and delaying the secondary chlorine addition can reduce DBP generation during water conveyance. Interestingly, while there was a weaker correlation between HAAs and chlorine dosage in the field research compared to the simulation experiment, THMs showed a positive correlation with chlorine addition in both scenarios.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Review
Green & Sustainable Science & Technology
Peng Li
Summary: Chlorination is the oldest and most common method for controlling water quality and biofouling. The accuracy of residual chlorine concentration measurements is vital, with various methods used for different purposes. This review discusses conventional and unconventional methods, highlighting interferences and proposing solutions, particularly in the widely used colorimetric-photometric method.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Environmental Sciences
Qi Shi, Zhuo Chen, Han Yan, Meiying Xu, Ke-Fan Cao, Yu Mao, Xiaowen Chen, Hong-Ying Hu
Summary: Ozone and chlorine are widely used disinfectants for water and wastewater disinfection. This study investigated the changes in bacterial community during ozone and chlorine disinfection in reclaimed water, and identified the typical disinfection residual bacteria (DRB) for each disinfectant. The findings highlight the importance of considering microbial safety after disinfection for sustainable water reclamation and reuse.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Peng Li, Takeshi Furuta, Takuya Kobayashi
Summary: Conventional colorimetric reagents for residual chlorine measurement have been widely used, but this study found that micro-particles could cause erroneous measurements, particularly in relation to inorganic and organic particles. The results suggest that filtration could be a potential solution to address the issue of erroneous measurements caused by micro particles.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2021)
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
Nikolay V. Ul'yanovskii, Ilya S. Varsegov, Sergey A. Sypalov, Dmitrii M. Mazur, Dmitry S. Kosyakov, Albert T. Lebedev
Summary: This study investigates the transformation pathways and mechanisms of cocamidopropyl betaine (CAPB) under chlorination conditions in pool water. The results reveal the formation of a wide range of disinfection by-products (DBPs) containing chlorine atoms, some of which have high toxicity and carcinogenic properties. The analysis of real swimming pool water samples confirms the presence of CAPB and other DBPs in the water.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Environmental
Jiaming Lily Shi, William A. Mitch
Summary: Chlorine reactions with peptide-bound amino acids contribute to pathogen inactivation by degrading protein structure and function, and forming disinfection byproducts. This study characterized the reactions of lysine and arginine with chlorine, demonstrating the formation of chloramines as the major products. The chloramines formed nitriles and aldehydes, which are more relevant than the corresponding aldehydes and nitriles to byproduct formation and pathogen inactivation over timescales relevant to drinking water distribution. Previous research has shown that lysine chloramines are cytotoxic and genotoxic, and their conversion to neutral chloramines alters protein structure and function, enhancing protein aggregation and contributing to pathogen inactivation.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Review
Public, Environmental & Occupational Health
A. M. Nielsen, L. A. T. Garcia, K. J. S. Silva, L. P. Sabogal-Paz, M. M. Hincapie, L. J. Montoya, L. Galeano, A. Galdos-Balzategui, F. Reygadas, C. Herrera, S. Golden, J. A. Byrne, P. Fernandez-Ibanez
Summary: Chlorination has been commonly used for providing safe drinking water, but there are challenges in effective implementation. A literature review focusing on three Latin American countries found that guidance on household-based chlorination may not incentivize users enough. Moreover, variations in water quality are often overlooked in recommending chlorine doses. User preferences, chlorine product quality, and availability also pose barriers to the sustainable use of chlorination.
INTERNATIONAL JOURNAL OF HYGIENE AND ENVIRONMENTAL HEALTH
(2022)
Article
Environmental Sciences
Taise Ferreira Vargas, Celia Ceolin Baia, Tatiana Lemos da Silva Machado, Caetano Chang Dorea, Wanderley Rodrigues Bastos
Summary: This study evaluated the decay kinetics of free chlorine in alternative individual water supply solutions used in Porto Velho in the Brazilian Amazon region. The type of well and initial chlorine concentration significantly influenced the decay speed of free chlorine, with water samples from tubular wells having lower chlorine demand levels attributed to better water quality. Simulation of residual chlorine decay in different water sources is an important tool for supporting safe disinfection processes.
Article
Environmental Sciences
Zhikang Wang, Lei Li, Robert W. Ariss, Kimberly M. Coburn, Mohsen Behbahani, Zheng Xue, Youngwoo Seo
Summary: This study investigated the impact of biofilms on the formation and eradication of disinfection by-products (DBPs) in Cl-2 and NH2Cl disinfected reactors. Cl-2 showed efficacy in biofilm removal and DBP formation, while NH2Cl resulted in lower DBP levels.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
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
Environmental Sciences
Rama Pulicharla, Francois Proulx, Sonja Behmel, Jean-B Serodes, Manuel J. Rodriguez
Summary: This study aimed to investigate the occurrence of contaminants of emerging interest in surface water and drinking water in five drinking water treatment plants in Quebec, Canada. Seven targeted CEI were analyzed in the water samples, showing varying concentration levels and removal efficiencies among the treatment plants.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Water Resources
John McGrath, Mahnoush Maleki, Christian Bouchard, Genevieve Pelletier, Manuel J. Rodriguez
Summary: This study presents a methodology for estimating free residual chlorine concentrations in water distribution systems, incorporating different degradation kinetics based on pipe material, age, and diameter. Field sampling and laboratory tests were conducted to estimate bulk kinetic constants, with results showing that pipe wall kinetics tend to dominate the degradation process in older pipes. The developed methodology can enhance the prediction of FRCC through hydraulic and water quality modeling.
URBAN WATER JOURNAL
(2021)
Article
Environmental Sciences
Panfeng Dou, Shudi Zuo, Yin Ren, Manuel J. Rodriguez, Shaoqing Dai
Summary: This study proposes a systematic framework for obtaining a gridded regional water security assessment, finding that the comprehensive water security in the Yangtze River Delta region is relatively high, but there is evidence of water resource shortage.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Environmental Sciences
Haroon R. Mian, Guangji Hu, Kasun Hewage, Manuel J. Rodriguez, Rehan Sadiq
Summary: This paper proposes a grey water footprint-based framework for water quality assessment, integrating probabilistic human health risk assessment to address uncertainties. The results show that groundwater-based drinking water quality management strategies provide better water quality compared to surface water sources. The GWF approach categorizes water quality by estimating the volume of fresh water needed to dilute contaminant concentrations, allowing stakeholders to develop a trade-off between water quality and quantity management.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Environmental
Jean-B Serodes, Sonja Behmel, Sabrina Simard, Olivier Laflamme, Antoine Grondin, Christine Beaulieu, Francois Proulx, Manuel J. Rodriguez
Summary: The study evaluated the use of acesulfame and chloride as co-tracers to represent the impact of pollution originating from wastewater and road de-icing on water quality in a municipal drinking water source. Spatial and temporal analyses of these tracers allowed for pinpointing probable origins of contamination and delineating priority intervention zones for improving drinking water source protection by municipal authorities.
Review
Green & Sustainable Science & Technology
Carlos Pena-Guzman, Maria Andrea Dominguez-Sanchez, Manuel Rodriguez, Rama Pulicharla, Karen Mora-Cabrera
Summary: COVID-19 has had a significant impact on global health and economy, leading researchers to focus on the distribution and transmission pathways of the SARS-CoV-2 virus in the urban water cycle. Studies have shown that wastewater treatment plants are a key focus for virus research, while studies on the virus in bodies of water are relatively scarce.
Article
Development Studies
Francoise Tardif, Flavie St-Pierre, Genevieve Pelletier, Manuel J. Rodriguez
Summary: This study focuses on the management of protection areas in water supply watersheds, including the calculation of overland travel times and river travel times. The estimation of overland travel times requires abundant data and expertise, and has important implications for land use planning.
JOURNAL OF ENVIRONMENTAL PLANNING AND MANAGEMENT
(2022)
Article
Environmental Sciences
Gyan Chhipi-Shrestha, Manuel Rodriguez, Sonja Behmel, Rama Pulicharla, Francois Proulx, Kasun Hewage, Rehan Sadiq
Summary: Contaminants of Emerging Concern in natural water pose ecological risks, with uncertainties in risk estimates. Classification of ecotoxicity values based on environmental parameters can reduce uncertainty in risk estimates.
Article
Environmental Sciences
Elham Ahmadpour, Stephan Halle, Isabelle Valois, Patrick Eddy Ryan, Sami Haddad, Manuel Rodriguez, Badr El Aroussi, Sabrina Simard, Ianis Delpla, Francois Proulx, Robert Tardif, Maximilien Debia
Summary: This study evaluates the spatial and temporal variations in trichloramine and trichloromethane concentrations within indoor swimming pools. The results show significant variations in concentration over time, suggesting that the common practice of collecting a single 2-hour air sample does not accurately represent the true exposure and health risks for workers. A new 8-hour sampling strategy or a full-shift strategy is recommended for accurate assessment.
JOURNAL OF OCCUPATIONAL AND ENVIRONMENTAL HYGIENE
(2022)
Article
Information Science & Library Science
Jerome Cerutti, Irene Abi-Zeid, Luc Lamontagne, Roxane Lavoie, Manuel J. Rodriguez
Summary: This paper describes a process of knowledge acquisition and modeling to support complex decision-making for protecting water sources. Through online surveys, interviews, and thematic analysis, structured descriptions of past problems and implemented solutions were gathered and organized. A knowledge-based recommender system prototype, based on case-based reasoning, was developed to guide decision-makers in developing solutions based on past experiences.
KNOWLEDGE MANAGEMENT RESEARCH & PRACTICE
(2022)
Article
Environmental Sciences
Elham Ahmadpour, Stephane Halle, Isabelle Valois, Patrick Eddy Ryan, Sami Haddad, Manuel Rodriguez, Robert Tardif, Maximilien Debia
Summary: Since 1995, Hery's trichloramine sampling procedure has been widely used to determine trichloramine exposure in indoor swimming pools. This study investigates the effects of different cassette assemblies and sampling flow rates on the levels of measured trichloramine. Laboratory tests and workplace measurements were conducted to evaluate the prefiltering strategies and the influence of flow rates on trichloramine concentrations. The results suggest that using a separable cassette assembly prevents overestimations of trichloramine levels and that there are no significant differences in trichloramine concentrations at different flow rates in swimming pools.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Rama Pulicharla, Francois Proulx, Sonja Behmel, Jean-B Serodes, Manuel J. Rodriguez
Summary: This study monitored seven contaminants in an urbanized watershed in Quebec, Canada and found that three of them were consistently detected at various sampling sites with concentrations ranging from a few hundred ng/L. Wastewater treatment plant and septic system discharges were identified as significant sources of CECs, and the concentrations of contaminants were higher in late winter compared to summer.
Article
Environmental Studies
Julia Cyr-Gagnon, Manuel J. Rodriguez
Summary: Municipalities in Quebec, Canada face challenges in implementing source water protection strategies, especially with the integration of spatially-referenced land use data with water quality data to estimate source water vulnerability. The main focus is on data management and validation for effective source water protection.
Article
Engineering, Environmental
Flavie St-Pierre, Francoise Tardif, Manuel J. Rodriguez, Genevieve Pelletier
Summary: The study compares the effectiveness of geographical-based approach and SWAT hydrological model-based approach in estimating water travel times within a watershed. The results suggest that while a geographical-based approach may work for non-point source contamination, it is less suitable for point source contamination, especially during drought conditions. The use of a hydrological-based model is more useful for implementing an emergency plan based on weather events.
ENVIRONMENTAL PROCESSES-AN INTERNATIONAL JOURNAL
(2021)
Article
Development Studies
S. Behmel, M. Damour, R. Ludwig, M. J. Rodriguez
Summary: This paper introduces a holistic, intelligent decision-support system framework for planning, managing, and optimizing surface water quality monitoring programs. The system architecture is designed based on a complex process that requires multiple variables, rules, and subject matter expert knowledge. Through case studies, the feasibility of the IDSS is demonstrated, and future testing plans are outlined for further validation.
JOURNAL OF ENVIRONMENTAL PLANNING AND MANAGEMENT
(2021)
