二氧化氯对颤蚓的灭活效果及机理初步探讨 Chlorine dioxide inactivation effect of <i>Tubifex tubifex</i> and preliminary investigation of inactivation mechanism期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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二氧化氯对颤蚓的灭活效果及机理初步探讨

引用本文：	谭万春,李志宏,聂小保,何盼盼,徐超,吴雨晴,孔俐.二氧化氯对颤蚓的灭活效果及机理初步探讨[J].环境科学学报,2017,37(9):3434-3440.

作者姓名：	谭万春李志宏聂小保何盼盼徐超吴雨晴孔俐

作者单位：	1. 长沙理工大学水利工程学院, 长沙 410114;2. 水沙科学与水灾害防治湖南省重点实验室, 长沙 410114;3. 长沙理工大学水科学与环境工程国际研究中心, 长沙 410114,1. 长沙理工大学水利工程学院, 长沙 410114;2. 水沙科学与水灾害防治湖南省重点实验室, 长沙 410114;3. 长沙理工大学水科学与环境工程国际研究中心, 长沙 410114,1. 长沙理工大学水利工程学院, 长沙 410114;2. 水沙科学与水灾害防治湖南省重点实验室, 长沙 410114;3. 长沙理工大学水科学与环境工程国际研究中心, 长沙 410114,1. 长沙理工大学水利工程学院, 长沙 410114;2. 水沙科学与水灾害防治湖南省重点实验室, 长沙 410114;3. 长沙理工大学水科学与环境工程国际研究中心, 长沙 410114,1. 长沙理工大学水利工程学院, 长沙 410114;2. 水沙科学与水灾害防治湖南省重点实验室, 长沙 410114;3. 长沙理工大学水科学与环境工程国际研究中心, 长沙 410114,1. 长沙理工大学水利工程学院, 长沙 410114;2. 水沙科学与水灾害防治湖南省重点实验室, 长沙 410114;3. 长沙理工大学水科学与环境工程国际研究中心, 长沙 410114,1. 长沙理工大学水利工程学院, 长沙 410114;2. 水沙科学与水灾害防治湖南省重点实验室, 长沙 410114;3. 长沙理工大学水科学与环境工程国际研究中心, 长沙 410114

基金项目：	国家自然科学基金（No.51458068）；湖南省重点研发计划项目（No.2015SK20033）；湖南省教育厅科学研究重点项目（No.16A009）

摘要：	供水系统中蠕虫类水生生物的出现严重危及供水水质安全.为实现供水系统中蠕虫风险的高效控制,以颤蚓为研究对象,探讨了二氧化氯对颤蚓的灭活动力学及水质对灭活效果的影响,并对灭活机理进行了初步探讨.结果表明:CT值(氧化剂浓度和接触时间的乘积)可以较好地用于评价ClO_2对颤蚓的灭活效果;灭活过程符合伪一级延迟Chick-Watson模型.温度的升高缩短了颤蚓灭活时的"延滞期",并提高了灭活效率;实验条件下,体系pH的增加有助于提高ClO_2灭活效率;浊度和有机物浓度的增加会导致灭活效率显著降低.当CT值超过80 mg·min·L~(-1)后,ClO_2将导致体系蛋白质浓度显著降低.颤蚓灭活过程中"延滞期"的出现和蛋白试验结果综合表明:颤蚓表皮层的存在有助于提高其对ClO_2的耐受性.SOD(超氧化物歧化酶)活性变化表明,ClO_2灭活颤蚓的主要作用机理之一是含氧自由基的诱导效应.
关键词：	颤蚓二氧化氯灭活动力学灭活机理
收稿时间：	2017/2/15 0:00:00
修稿时间：	2017/3/21 0:00:00
*Chlorine dioxide inactivation effect of Tubifex tubifex* and preliminary investigation of inactivation mechanism**

TAN Wanchun,LI Zhihong,NIE Xiaobao,HE Panpan,XU Chao,WU Yuqing and KONG Li.Chlorine dioxide inactivation effect of Tubifex tubifex and preliminary investigation of inactivation mechanism[J].Acta Scientiae Circumstantiae,2017,37(9):3434-3440.

Authors:	TAN Wanchun LI Zhihong NIE Xiaobao HE Panpan XU Chao WU Yuqing and KONG Li

Institution:	1. School of Hydraulic Engineering, Changsha University of Science & Technology, Changsha 410114;2. Key Laboratory of Water-sediment Sciences and Water Disaster Prevention of Hunan Province, Changsha 410114;3. International Research Center of Water Science & Environmental Engineering, Changsha University of Science & Technology, Changsha 410114,1. School of Hydraulic Engineering, Changsha University of Science & Technology, Changsha 410114;2. Key Laboratory of Water-sediment Sciences and Water Disaster Prevention of Hunan Province, Changsha 410114;3. International Research Center of Water Science & Environmental Engineering, Changsha University of Science & Technology, Changsha 410114,1. School of Hydraulic Engineering, Changsha University of Science & Technology, Changsha 410114;2. Key Laboratory of Water-sediment Sciences and Water Disaster Prevention of Hunan Province, Changsha 410114;3. International Research Center of Water Science & Environmental Engineering, Changsha University of Science & Technology, Changsha 410114,1. School of Hydraulic Engineering, Changsha University of Science & Technology, Changsha 410114;2. Key Laboratory of Water-sediment Sciences and Water Disaster Prevention of Hunan Province, Changsha 410114;3. International Research Center of Water Science & Environmental Engineering, Changsha University of Science & Technology, Changsha 410114,1. School of Hydraulic Engineering, Changsha University of Science & Technology, Changsha 410114;2. Key Laboratory of Water-sediment Sciences and Water Disaster Prevention of Hunan Province, Changsha 410114;3. International Research Center of Water Science & Environmental Engineering, Changsha University of Science & Technology, Changsha 410114,1. School of Hydraulic Engineering, Changsha University of Science & Technology, Changsha 410114;2. Key Laboratory of Water-sediment Sciences and Water Disaster Prevention of Hunan Province, Changsha 410114;3. International Research Center of Water Science & Environmental Engineering, Changsha University of Science & Technology, Changsha 410114 and 1. School of Hydraulic Engineering, Changsha University of Science & Technology, Changsha 410114;2. Key Laboratory of Water-sediment Sciences and Water Disaster Prevention of Hunan Province, Changsha 410114;3. International Research Center of Water Science & Environmental Engineering, Changsha University of Science & Technology, Changsha 410114

Abstract:	Aquatic organisms such as invertebrate worms in water supply system result in serious pollution of drinking water quality. In order to achieve the efficient control of worms risk in water supply system, the inactivation kinetics of chlorine dioxide on worms as well as the effect of water quality on the inactivation were studied by taking T. tubifex as the object worm. In addition, the inactivation mechanism was preliminarily investigated. The results showed that the CT value (the product of ClO₂ concentration and contact time) could be used to evaluate the inactivation effect of ClO₂ on T. tubifex, and the inactivation process was found to comply with a delayed pseudo first-order Chick-Watson expression. The increasing temperature reduced the lag period of T. tubifex inactivation thus raised the inactivation efficiency. Under the tested conditions, the increase of pH value in the system could improve the inactivation efficiency, whereas the increase of turbidity and COD_Mn could significantly reduce the efficiency. When the CT value exceeded 80 mg·min·L^-1, it resulted in notable decline of protein concentration. Both the occurrence of lag period during T. tubifex inactivation and the protein tests showed that the presence of T. tubifex epidermis could contribute to its tolerance to ClO₂. The variation of SOD (Superoxide Disnutase) activity also indicated that the induction effect of the oxygenic free radical is one of the main mechanisms in the inactivation of T. tubifex by chlorine dioxide.

Keywords:	T tubifex chlorine dioxide inactivation kinetic inactivation mechanism
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