Article
Chemistry, Multidisciplinary
Bo Guo, Sen Zhang, Xing Xu, Baoyu Gao, Qian Li, Qinyan Yue
Summary: The deterioration of water caused by industrial production is a significant problem. This study demonstrates the use of ferric chloride and poly-ferric chloride coupled with polyamidine to enhance coagulation and remove toxic organics. The addition of polyamidine significantly improves the coagulation performance of the iron-based coagulants. The results show that charge neutralization and adsorption-bridging are the main processes for the removal of organics, and the purification performance is enhanced by the higher charge density of polyamidine.
CHINESE CHEMICAL LETTERS
(2023)
Article
Engineering, Environmental
Jun Hu, Yiran Xu, Ying Chen, Jiang Chen, Huiyu Dong, Jianming Yu, Zhimin Qiang, Jiajia Qu, Jianmeng Chen
Summary: The study showed that lead dioxide (PbO2) can oxidize iodide (I-) to form toxic iodinated DBPs in drinking water pipes, while biofilm extracellular polymeric substances (EPS) are important precursors of DBPs formation. The research also found that EPS proteins have a higher potential for organic iodine formation, resulting in higher toxicity of iodinated DBPs.
Article
Environmental Sciences
Heng Song, Zhi-Qiang Sun, Da-Long Li, Jing Zhang, Xiao-Qun Zhou, Xiang-Rui Pan, Lu Wang, Yan-Jun Xin, Yu-Lei Liu, Jun Ma
Summary: This study investigated the formation of iodinated aromatic disinfection byproducts in the presence of iodide and organic compounds under different HOCl:NH3-N molar ratios. Various iodinated DBPs were identified and the possible pathways for their formation were proposed. The concentration of iodinated aromatic DBPs remained stable at a 1:1 molar ratio, but decreased over time when the ratio was 6:1, with active chlorine as the main disinfectant in the system. These findings can be used to control the formation of hazardous iodinated aromatic DBPs in iodine-containing water disinfection processes.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Kamila Jessie Sammarro Silva, Larissa Lopes Lima, Gustavo Santos Nunes, Lyda Patricia Sabogal-Paz
Summary: This study investigates the properties of aggregates in water and wastewater treatment and proposes Visibility Graph (VG) technique as an alternative method for analysis. While VG approach sheds some light onto the characteristics of aggregates over time, its effectiveness in terms of treatability needs further validation in the environmental and sanitation context.
WATER AIR AND SOIL POLLUTION
(2021)
Article
Biotechnology & Applied Microbiology
Sarah Hailan, Patrik Sobolciak, Peter Kasak, Anton Popelka, Yongfeng Tong, Samer Adham, Igor Krupa
Summary: FESEM measurements of the samples were performed at the Central Laboratories Unit at Qatar University. The fluorescence image of the PW was obtained at the Biomedical Research Center, Qatar University. XPS measurements were conducted at the Core Labs at Hamad Bin Khalifa University. All authors approved the version of the manuscript to be published. Open access funding was provided by the Qatar National Library.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2023)
Article
Environmental Sciences
Tayebeh Goli, Yasha Jathan, Yu Yang, Krishna R. Pagilla, Eric A. Marchand
Summary: Most wastewater treatment facilities remove dissolved inorganic nitrogen (DIN) efficiently, but leave dissolved organic nitrogen (DON) at a higher proportion in the effluent. Discharged DON promotes algae growth and formation of hazardous nitrogenous disinfection byproducts (N-DBPs). This study evaluated the DON removal efficiency of enhanced coagulation at a pilot scale using different coagulants and polymer. Enhanced coagulation effectively reduced DON in the effluent with auxiliary benefits of dissolved organic carbon and orthophosphate removal.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Polymer Science
Bader S. Al-Anzi, Mehraj-ud-din Naik, Mudasir Ahmad
Summary: The coagulation process was found to be effective in removing turbidity and TSS from tile industry wastewater. The dosage of coagulant and pH values were found to greatly influence the efficiency of the coagulation process. Increasing the coagulant dosage from 10 to 50 mg/L improved the turbidity removal efficiency from 95.6% to 99.5%. Additionally, higher pH values improved the turbidity removal efficiency. The study concluded that coagulation could be a useful primary treatment process for tile industry wastewater.
Article
Food Science & Technology
Airton C. Bortoluzzi, Carolina E. Demaman Oro, Maicon S. N. dos Santos, Marcelo L. Mignoni, Rogerio M. Dallago, Juliana Steffens, Marcus Tres
Summary: This study evaluated the efficiency of combining chemical coagulation with membrane separation and reverse osmosis processes in treating effluents from a powdered milk dairy industry. The results showed that chemical coagulation was effective in removing some cations and color, while membrane separation and reverse osmosis processes were able to remove pollutants more comprehensively, meeting the water quality standards defined by legislation.
JOURNAL OF FOOD SCIENCE AND TECHNOLOGY-MYSORE
(2023)
Article
Biotechnology & Applied Microbiology
N. R. H. Rao, A. Gonzalez-Torres, B. Tamburic, Y. W. Wong, I. Foubert, K. Muylaer, R. K. Henderson, D. Vandamme
Summary: Flocculation in marine microalgae can be induced sustainably through alkaline flocculation, resulting in flocs that can be harvested via dissolved air flotation (DAF) or sedimentation. Though DAF provides faster separation and higher solids content compared to sedimentation, its effectiveness in saline environments when used with alkaline flocculation has not been tested. This study evaluates the impact of alkaline floc properties on DAF performance and compares it with sedimentation and ferric chloride flocculation.
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2023)
Article
Engineering, Chemical
Mohsen Behnezhad, Farzad Hashemzadeh, Amir Hesam Hassani
Summary: This study investigated the effectiveness of ozonation in reducing leachate pollution of a disposal center, reporting that ozonation after coagulation-flocculation had better performance. Ferric chloride showed better efficiency under acidic conditions, with optimal efficiency at pH 11.
DESALINATION AND WATER TREATMENT
(2021)
Article
Biochemistry & Molecular Biology
Rizwan Khan, Muhammad Ali Inam, Kang Hoon Lee
Summary: The study investigated the removal of tannic acid (TA)-stabilized CuO nanoparticles using polyaluminum ferric chloride (PAFC) as a coagulant in the coagulation-sedimentation (C/S) process. It was found that stirring speed in the reaction phase significantly affected removal efficiency, while pH and ionic strength (IS) impacted the colloidal stability and removal efficiency of CuO NPs. The addition of organic ligands reversed the surface charge potential and enhanced colloidal stability, leading to destabilization of TA-CuO NPs and reducing the optimal PAFC dosage for removal.
Article
Green & Sustainable Science & Technology
Stefanos Koutzaris, Maria Xanthopoulou, Asterios Laskaridis, Ioannis A. A. Katsoyiannis
Summary: Arsenic is a natural contaminant in water that poses a risk to human health. The most commonly used method for removing arsenic is coagulation using Fe(III) salts, but this is typically more effective for As(V) removal. This study demonstrates that the addition of H2O2 to Fe(III) coagulation can significantly enhance the removal of As(III), eliminating the need for a pre-oxidation step.
Article
Materials Science, Paper & Wood
Nursia Hassan, Tan Li Wen, Amirah Khairina Khairil Anwar, Ani Idris
Summary: The research showed that using ferric chloride ionic solution to pretreat oil palm empty fruit bunch with microwave irradiation can significantly increase the total reducing sugar yield. The optimal pretreatment conditions were found to be 10 minutes, 100 degrees Celsius, and 10% ferric chloride concentration. This pretreatment method is a promising alternative to replace other pretreatment methods.
Article
Green & Sustainable Science & Technology
Alfredo Gonzalez-Perez, Kristofer Hagg, Fabrice Duteil
Summary: Understanding NOM and its impact on water quality is crucial for catchment and water utility managers. NOM affects disinfectant demand, by-product formation, and water treatment processes. This study found that using calcium chloride as a co-coagulant in Al3+ and Fe3+ assisted coagulation processes can reduce the need for primary coagulants, potentially reducing environmental impact and costs.
Article
Engineering, Chemical
Min Xu, Yixin Luo, Xiaomeng Wang, Lixiang Zhou
Summary: The study found that PAC exhibited the best filtration flux under neutral and alkaline conditions, while pre-coagulation with TXC was slightly superior to PAC and PFS under acidic conditions. Overdosed coagulants also facilitated subsequent membrane filtration under acidic conditions, although pollutants may re-stabilize in solution.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Environmental
Yang Deng
Summary: When designing sustainable household water treatment systems, it is important to consider treatment capability, environmental friendliness, user experience, economic viability, and social acceptance. To achieve this, advanced materials, innovative technologies, and user-centered design approaches should be employed. Additionally, efforts should be made to reduce environmental and energy footprints, manage residuals, increase user willingness to use and pay, and foster social acceptance and market adoption.
Article
Engineering, Environmental
Yun Wu, Wenzhe Wei, Jiayi Luo, Yang Pan, Mengting Yang, Ming Hua, Wenhai Chu, Chendong Shuang, Aimin Li
Summary: The study compared the in vitro and in vivo toxicity of cyclic DBPs and aliphatic DBPs, revealing different toxicity rank orders with application of different endpoints. A Pearson correlation analysis of DBP toxicity data showed high correlation between observed cytotoxicity in Hep G2 cells and zebrafish embryo toxicity with previously reported in vitro and in vivo toxicity. The study also established two QSAR models to interpret the toxicity mechanisms of DBPs from different endpoints.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Environmental Sciences
Shunke Ding, Menglin Wu, Rong Xiao, Chao Fang, Qi Wang, Bin Xu, Wenhai Chu
Summary: Disinfection by-products (DBPs) formed from the reactions of disinfectants with natural organic matter and halides in drinking water can have cytotoxic and genotoxic effects and potentially lead to various cancers. This study evaluated N-acetylcysteine (NAC) and glutathione (GSH) as quenching agents for the analysis of halogenated DBPs. The results showed that NAC and GSH are ideal quenching agents for most DBPs and total organic halogen (TOX) analysis.
JOURNAL OF ENVIRONMENTAL SCIENCES
(2022)
Article
Engineering, Environmental
Feilong Dong, Zhen Pang, Jianquan Yu, Jing Deng, Xueyan Li, Xiaoyan Ma, Andrea M. Dietrich, Yang Deng
Summary: The study examined the distribution of halogenated disinfection byproducts in a two-source water distribution system with enhanced chlorination, finding that factors such as different water sources, treatment processes, and chlorination levels significantly influenced the spatial and seasonal variations of DBPs. Through innovative methodologies, the research identified high-risk areas for certain DBPs and revealed the effects of various factors on DBP distribution within the system.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Review
Environmental Sciences
Rong Xiao, Tian Ou, Shunke Ding, Chao Fang, Zuxin Xu, Wenhai Chu
Summary: This article provides an overview of disinfection by-products (DBPs) in the urban water cycle, discussing their characteristics, occurrence, and fate in different aqueous environments. The review highlights the influence of internal and external factors on DBP fate and removal. The identification and monitoring of DBPs, as well as predictive modeling, are necessary for assessing and mitigating their potential impacts on ecological safety and human health. Future research should also focus on the occurrence and fate of DBPs in the air and terrestrial ecosystems.
CRITICAL REVIEWS IN ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Environmental
Di Zhang, Tom Bond, Yang Pan, Mingli Li, Jiayi Luo, Rong Xiao, Wenhai Chu
Summary: This study reports the presence of six new aromatic nitrogenous disinfection byproducts (DBPs) in drinking water. Haloanilines completely degrade in the presence of chlorine within 1 hour, but about 20% remains in the presence of chloramine after 120 hours. Haloanilines show high stability in the absence of disinfectants at pH 5-9. Eight haloanilines were detected in chloraminated finished water and tap water, with the highest total concentration reaching 443 ng/L. The cytotoxicity of haloanilines was lower than that of regulated DBPs. The formation and control of haloanilines in drinking water call for further investigation.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Environmental
Zhenqi Du, Shunke Ding, Rong Xiao, Chao Fang, Wuchang Song, Ruibao Jia, Wenhai Chu
Summary: Snow with large specific surface area and strong adsorption capacity can effectively adsorb atmospheric pollutants, leading to an increase in disinfection by-product (DBP) precursors in surface water. The dissolved organic matter (DOM) in meltwater is mainly composed of low molecular weight organics with low aromaticity and high unsaturation. DBP formation and cytotoxicity indexes in chlorinated meltwater are positively correlated with air quality index and are influenced by snowfall stages. The yield of halonitromethanes in meltwater is significantly higher than that in surface water.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(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
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
Engineering, Civil
Ruihua Zhang, Yunhui Zhang, Xiali Fei, Yingna Hou, Jun Shi, Enchao Li, Wenhai Chu
Summary: This article provides a comprehensive overview of the distribution, biological traits, risks, and control methods of Limnoperna fortunei. The planktonic larval stage is identified as a critical period for the expansion of this species, and its biofouling process relies on the adhesion of byssus to substrates. Various physical and chemical methods have been proposed and used to control Limnoperna fortunei, with sodium hypochlorite showing effectiveness in preventing adhesion. However, effective and environmental-friendly antifouling strategies are still lacking, particularly in drinking water treatment systems. This review not only enhances the understanding of Limnoperna fortunei but also provides guidance for prevention and control.
AQUA-WATER INFRASTRUCTURE ECOSYSTEMS AND SOCIETY
(2022)
Article
Chemistry, Physical
Panpan Gao, Yunyi He, Shihuan Lu, Mengfan He, Zhiqun Liu, Yang Deng, Zhiquan Liu, Ting Xu, Hangjun Zhang
Summary: A novel perovskite-type catalyst was developed for emergency removal of harmful algae in water. The results showed that La2CuO4/PMS system achieved significant removal efficiency of Microcystis aeruginosa cells (97%) and chlorophyll-a (100%) within 20 minutes without significant release of dissolved organic carbon and metals in water. The generation of & BULL;OH, SO4 & BULL;-, 1O2, and & BULL;O2- was responsible for algae inactivation and subsequent algal organic matters removal. The proposed heterogeneous catalytic mechanism suggested that La portion in La2CuO4 destabilized the cells by increasing zeta potential of algae suspension, while Cu portion facilitated electron transfer to improve the yields of & BULL;OH and SO4 & BULL;-. This study demonstrates that the new catalytic PMS process promises viable and effective control of harmful algal bloom impacts in water treatment.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Engineering, Environmental
Yan Liu, Jianfa Gao, Qingyao Zhu, Xi Zhou, Wenhai Chu, Jingxiong Huang, Changkun Liu, Bo Yang, Mengting Yang
Summary: This study reports the effective degradation of halogenated aromatic disinfection byproducts (DBPs) by ZVI/Cu and establishes a novel mechanism-based quantitative structure-activity relationship model to predict degradation rate constants. The study found that ZVI/Cu can effectively degrade not only aliphatic DBPs but also new emerging aromatic DBPs formed in chlorinated and chloraminated drinking water. A quantitative structure-activity relationship model was developed to predict the degradation rate constants of other aromatic DBPs, and optimized descriptors were identified.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Ruixin Qu, Shunke Ding, Haixin Li, Pin Wang, Lixing Pan, Wenhai Chu
Summary: Our recent study validates that household cooking with seaweed salt and chloraminated water can significantly promote the formation of iodinated disinfection by-products (I-DBPs). The research investigates the effect of different disinfectant species on I-DBP formation from seaweed salt. The findings indicate that the addition of seaweed salt increases the concentration of I-THMs in tap water after simulated household cooking.
ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY
(2022)