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电活性生物膜对慢性氯暴露的响应：来自胞外聚合物组成和空间结构的见解。

Responses of electroactive biofilms to chronic chlorine exposure: Insights from the composition and spatial structure of extracellular polymeric substances.

机构信息

Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China.

College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China.

出版信息

Bioelectrochemistry. 2021 Dec;142:107894. doi: 10.1016/j.bioelechem.2021.107894. Epub 2021 Jul 27.

DOI:10.1016/j.bioelechem.2021.107894
PMID:34371350
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8492042/
Abstract

Extensive amounts of chlorine disinfectants have been applied to wastewater system since the outbreak of coronavirus disease 2019 (COVID-19), which inevitably affects the pollutant degradation via interfering with electron transfer mediated by electroactive bacteria. Herein, the response of electroactive biofilm (EAB) to chronic chlorine exposure was investigated. Results showed the EAB formed without exposure (EAB-0) exhibited a 53% and 123% higher current output than that formed with 0.1 mg L (EAB-0.1) and 0.5 mg L (EAB-0.5) chlorine, respectively. The chronic chlorine exposure of EAB boosted the contents of extracellular polymeric substances (EPS) in EAB-0.1 and EAB-0.5 by over secretion of extracellular polysaccharides. The EAB-0.1 and EAB-0.5 also presented lower electron exchange capacities (EECs) of EPS, coincided with reduced relative abundance of Geobacter from 61% in EAB-0 to 52% in EAB-0.5. This study provided new insights into the application of engineered EAB for wastewater treatment in a disinfection environment.

摘要

自 2019 年冠状病毒病（COVID-19）爆发以来，大量的氯消毒剂已被应用于废水系统，这不可避免地通过干扰电活性细菌介导的电子转移来影响污染物的降解。在此，研究了电活性生物膜（EAB）对慢性氯暴露的反应。结果表明，未经暴露形成的 EAB（EAB-0）的电流输出比暴露于 0.1mg/L（EAB-0.1）和 0.5mg/L（EAB-0.5）氯形成的 EAB 分别高出 53%和 123%。慢性氯暴露于 EAB-0.1 和 EAB-0.5 通过细胞外多糖的过度分泌，使 EAB 中的细胞外聚合物（EPS）含量增加。EAB-0.1 和 EAB-0.5 的 EPS 电子交换能力（EEC）也较低，与 Geobacter 的相对丰度从 EAB-0 中的 61%降至 EAB-0.5 中的 52%相符。本研究为在消毒环境中使用工程化 EAB 进行废水处理提供了新的见解。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cd56/8492042/0fc97a0ce566/gr8_lrg.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cd56/8492042/393a48d838a4/ga1_lrg.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cd56/8492042/70c732318464/gr1_lrg.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cd56/8492042/d7d2d34d7c8f/gr2_lrg.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cd56/8492042/524aff7f4534/gr3_lrg.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cd56/8492042/ee1c1ca86ed6/gr4_lrg.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cd56/8492042/ff6d3857ca2b/gr5_lrg.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cd56/8492042/8fadb2b43ba7/gr6_lrg.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cd56/8492042/a0acd71e211c/gr7_lrg.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cd56/8492042/0fc97a0ce566/gr8_lrg.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cd56/8492042/393a48d838a4/ga1_lrg.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cd56/8492042/70c732318464/gr1_lrg.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cd56/8492042/d7d2d34d7c8f/gr2_lrg.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cd56/8492042/524aff7f4534/gr3_lrg.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cd56/8492042/ee1c1ca86ed6/gr4_lrg.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cd56/8492042/ff6d3857ca2b/gr5_lrg.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cd56/8492042/8fadb2b43ba7/gr6_lrg.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cd56/8492042/a0acd71e211c/gr7_lrg.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cd56/8492042/0fc97a0ce566/gr8_lrg.jpg

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Responses of electroactive biofilms to chronic chlorine exposure: Insights from the composition and spatial structure of extracellular polymeric substances.

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引用本文的文献

[1]
Studying the Degradation of Three Polymers under Different Chlorine Concentrations and Exposure Times.

Polymers (Basel). 2023-9-29

本文引用的文献

[1]
Disinfection technology of hospital wastes and wastewater: Suggestions for disinfection strategy during coronavirus Disease 2019 (COVID-19) pandemic in China.

Environ Pollut. 2020-4-24

[2]
Anode potential-dependent protection of electroactive biofilms against metal ion shock via regulating extracellular polymeric substances.

Water Res. 2020-4-21

[3]
Bacteria and virus reduction in secondary treatment: Potential for minimizing post disinfectant demand.

Water Res. 2020-4-11

[4]
Disinfection threatens aquatic ecosystems.

Science. 2020-4-10

[5]
Balancing carbon, nitrogen and phosphorus concentration in seawater as a strategy to prevent accelerated membrane biofouling.

Water Res. 2019-8-13

[6]
Anode potentials regulate Geobacter biofilms: New insights from the composition and spatial structure of extracellular polymeric substances.

Water Res. 2019-5-9

[7]
Real-Time Imaging Revealed That Exoelectrogens from Wastewater Are Selected at the Center of a Gradient Electric Field.

Environ Sci Technol. 2018-7-24

[8]
Structures, Compositions, and Activities of Live Shewanella Biofilms Formed on Graphite Electrodes in Electrochemical Flow Cells.

Appl Environ Microbiol. 2017-8-17

[9]
Insights into the short-term effects of CeO nanoparticles on sludge dewatering and related mechanism.

Water Res. 2017-4-8

[10]
The effect of different aeration conditions in activated sludge--Side-stream system on sludge production, sludge degradation rates, active biomass and extracellular polymeric substances.

Water Res. 2015-8-4

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