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Toxicity effects of disinfection byproduct chloroacetic acid to Microcystis aeruginosa: Cytotoxicity and mechanisms.
Ye, Jing; Ni, Jiawei; Tian, Fuxiang; Ji, Xiyan; Hou, Meifang; Li, Yuanting; Yang, Lei; Wang, Runxiang; Xu, Wenwu; Meng, Liang.
  • Ye J; School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, China. Electronic address: yejinganna@sit.edu.cn.
  • Ni J; School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, China.
  • Tian F; School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, China.
  • Ji X; School of Ecological Technology and Engineering, Shanghai Institute of Technology, Shanghai 201418, China.
  • Hou M; School of Ecological Technology and Engineering, Shanghai Institute of Technology, Shanghai 201418, China.
  • Li Y; School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, China.
  • Yang L; School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, China.
  • Wang R; School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, China.
  • Xu W; School of Railway Transportation, Shanghai Institute of Technology, Shanghai 201418, China.
  • Meng L; School of Environmental and Geographical Sciences, Shanghai Normal University, Shanghai 200234, China.
J Environ Sci (China) ; 129: 229-239, 2023 Jul.
Article in English | MEDLINE | ID: covidwho-2246566
ABSTRACT
Chlorine-based disinfectants are widely used for disinfection in wastewater treatment. The mechanism of the effects of chlorinated disinfection by-products on cyanobacteria was unclear. Herein, the physiological effects of chloroacetic acid (CAA) on Microcystis aeruginosa (M. aeruginosa), including acute toxicity, oxidative stress, apoptosis, production of microcystin-LR (MC-LR), and the microcystin transportation-related gene mcyH transcript abundance have been investigated. CAA exposure resulted in a significant change in the cell ultrastructure, including thylakoid damage, disappearance of nucleoid, production of gas vacuoles, increase in starch granule, accumulation of lipid droplets, and disruption of cytoplasm membranes. Meanwhile, the apoptosis rate of M. aeruginosa increased with CAA concentration. The production of MC-LR was affected by CAA, and the transcript abundance of mcyH decreased. Our results suggested that CAA poses acute toxicity to M. aeruginosa, and it could cause oxidative damage, stimulate MC-LR production, and damage cell ultrastructure. This study may provide information about the minimum concentration of CAA in the water environment, which is safe for aquatic organisms, especially during the global coronavirus disease 2019 pandemic period.
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Full text: Available Collection: International databases Database: MEDLINE Main subject: Cyanobacteria / Microcystis / COVID-19 Type of study: Experimental Studies Limits: Humans Language: English Journal: J Environ Sci (China) Journal subject: Environmental Health Year: 2023 Document Type: Article

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Full text: Available Collection: International databases Database: MEDLINE Main subject: Cyanobacteria / Microcystis / COVID-19 Type of study: Experimental Studies Limits: Humans Language: English Journal: J Environ Sci (China) Journal subject: Environmental Health Year: 2023 Document Type: Article