饮用水中悬浮颗粒物对微生物聚集和消毒效果的影响

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摘要针对目前有关消毒剂胁迫下颗粒物对微生物保护作用机制尚不清晰,以饮用水中微生物为研究对象,通过构建静态模拟实验装置,解析消毒剂胁迫下针铁矿对微生物聚集和消毒效果的影响机制.结果表明,当未投加消毒剂氯时,针铁矿浓度对水中微生物失活率基本没有影响;而当有氯存在时,针铁矿促进氯的衰减、微生物胞外聚合物的分泌以及其聚集行为,进而增强其抵抗消毒剂灭活的能力,尤其在0.5mg/L氯时,其保护效果较为显著.

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	章鑫鑫
	谷正
	余超
	陈国炜
	刘丽

关键词 ：饮用水, 悬浮颗粒物, 氯消毒, 微生物, 胞外聚合物, 聚集

Abstract：Considering that the mechanism of disinfection-stressed protection effects of suspended particles on microbes remained unclear, this study investigated the chlorination-stressed protection effects of these particles on microbes in drinking water by analyzing microbial physiological characteristics and aggregation behaviors via a static experimental setup. The results showed that goethite dosage had a minor impact on the logarithmic inactivation rate on microbes in drinking water when the absence of chlorine. However, the presence of goethite stimulated microbial aggregation behaviors and the chlorine decay process, thus goethite playing a protective role when associating with chlorination stress, particularly at 0.5mg/L chlorine.

Key words： drinking water suspended particles chlorination microbes extracellular polymer substances aggregation

收稿日期: 2021-04-30

PACS:

X703.5

基金资助:国家自然科学基金资助项目(51479046)

通讯作者: 刘丽, 教授, lliu@hfut.edu.cn E-mail: lliu@hfut.edu.cn

作者简介: 章鑫鑫(1994-),女,安徽合肥人,合肥工业大学硕士研究生,主要研究方向为颗粒物与细菌交互作用.发表论文1篇

引用本文:

章鑫鑫, 谷正, 余超, 陈国炜, 刘丽. 饮用水中悬浮颗粒物对微生物聚集和消毒效果的影响[J]. 中国环境科学, 2022, 42(1): 76-82. ZHANG Xin-xin, GU Zheng, YU Chao, CHEN Guo-wei, LIU Li. Effect of suspended particles in drinking water on microbial aggregation and disinfection. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(1): 76-82.

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http://www.zghjkx.com.cn/CN/ 或 http://www.zghjkx.com.cn/CN/Y2022/V42/I1/76

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