| 高强UV/SO32-体系高效降解一氯乙酸 |
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| 引用本文： | 顾玉蓉,董文艺,董紫君,唐建军. 高强UV/SO32-体系高效降解一氯乙酸[J]. 中国环境科学, 2019, 39(11): 4722-4729 |
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| 作者姓名： | 顾玉蓉 董文艺 董紫君 唐建军 |
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| 作者单位： | 1. 深圳职业技术学院建筑与环境工程学院, 广东 深圳 518055;2. 哈尔滨工业大学(深圳)土木与环境工程学院, 广东 深圳 518055 |
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| 基金项目： | 国家水体污染控制与治理科技重大专项（2015ZX07206-006）；深圳市基础研究项目（JCYJ20170306144117642）；深圳职业技术学院校级项目（6019310013K） |
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| 摘 要： | 为有效解决饮用水中卤代乙酸（HAAs）污染问题，选取水中典型HAAs一氯乙酸（MCAA）作为目标污染物，系统研究了高强UV/SO32-体系对其降解效能及影响因素.结果表明，高强UV/SO32-体系可高效降解MCAA，50s内初始浓度为50 μmol/L的MCAA可被完全降解.与已报导的还原法降解MCAA的文献相比，本研究中MCAA降解速率提高了1000倍以上.提高SO32-浓度、溶液初始pH以及紫外光强均有利于体系中MCAA降解率的提高.水中共存物质研究表明，NH4+可促进MCAA降解，而NO3-、HCO3-、NOM均会抑制MCAA降解，其中，HCO3-影响较小.
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| 关 键 词： | 卤代乙酸 一氯乙酸 SO32- |
| 收稿时间： | 2019-04-29 |
Efficient decomposition of monochloroaceticaid in the high intensity UV/sulfite system |
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| GU Yu-rong,DONG Wen-yi,DONG Zi-jun,TANG Jian-jun. Efficient decomposition of monochloroaceticaid in the high intensity UV/sulfite system[J]. China Environmental Science, 2019, 39(11): 4722-4729 |
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| Authors: | GU Yu-rong DONG Wen-yi DONG Zi-jun TANG Jian-jun |
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| Affiliation: | 1. School of Construction and Environmental Engineering, Shenzhen Polytechnic, Shenzhen 518055, China;2. School of Civil and Environmental Engineering, Harbin Institute of Technology(Shenzhen), Shenzhen 518055, China |
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| Abstract: | Monochloroacetic acid (MCAA), a typical aqueous HAAs, was selected as the target pollutant to solve the problem of HAAs pollution in drinking water. MCAA decomposition efficiency and its influencing factors in the high intensity UV/sulfite system were systematically investigated. The results showed efficient MCAA decomposition in the high intensity UV/sulfite system was obtained. MCAA was completely decomposed at its initial concentration of 50μmol/L in 50s. Compared with reportedly literatures related to reductive MCAA decomposition, MCAA decomposition rate in this study was increased above 1000 folds. Increase of sulfite dosage, initial solution pH and UV intensity was found beneficial for increasing MCAA decomposition efficiency in the studied system. Results on co-exsisting constitutents revealed that NH4+ can promote MCAA decomposition, whereas NO3-, HCO3- and NOM all inhibited MCAA decomposition. Amongst them, HCO3- showed less inhibition effect. |
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| Keywords: | HAAs MCAA sulfite |
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