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[1]李梦宇,刘志,张天阳,等.氯胺消毒工艺中一氯胺生成效率的影响规律[J].中国给水排水,2021,37(3):38-44.
　LI Meng-yu,LIU Zhi,ZHANG Tian-yang,et al.Impact Factors of Monochloramine Formation Efficiency during Chloramination Disinfection[J].China Water & Wastewater,2021,37(3):38-44.

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氯胺消毒工艺中一氯胺生成效率的影响规律

中国给水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第37卷期数: 2021年第3期页码: 38-44 栏目: 出版日期: 2021-02-01

Title:: Impact Factors of Monochloramine Formation Efficiency during Chloramination Disinfection

作者:: 李梦宇，刘志，张天阳，徐斌; (同济大学环境科学与工程学院污染控制与资源化研究国家重点实验室，上海200092)

Author(s):: LI Meng-yu,LIU Zhi,ZHANG Tian-yang,XU Bin; (State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China)

关键词:: 氯胺消毒; 一氯胺; 消毒副产物; 影响因素

Keywords:: chloramine disinfection; monochloramine; disinfection by-products; impact factor

摘要:: 以上海市某自来水厂滤后水为研究对象，系统考察了氯胺消毒过程中氮源种类、氯氮比、pH值、反应时间、温度、G值和氯投加速率等因素对一氯胺浓度及消毒副产物（DBPs）生成量的影响。结果表明，氮源种类、Cl₂/N质量比和pH值为主要影响因素，其他为次要影响因素。与氯化铵、碳酸铵、醋酸铵和氨水这4种氮源相比，以硫酸铵为氮源可生成较高浓度的一氯胺；当pH值由6.0增大到9.0时，一氯胺浓度（以Cl₂计）由2.611 mg/L升高至4.256 mg/L；随着Cl2/N质量比由2 ∶1逐渐增至8 ∶1，一氯胺浓度先升后降，并在5 ∶1时达到最大值3.831 mg/L。DBPs浓度随Cl₂/N质量比、反应时间、温度和氯投加速率的增加而升高，随G值的增大而降低；而随着pH值由6.0增加到9.0，DBPs浓度先降低后略有增加。自来水厂氯胺消毒工艺中一氯胺生成的最佳工艺条件如下：以硫酸铵为氮源，Cl₂/N质量比为（4 ∶1）~（5 ∶1），pH值为中性或碱性，反应时间为2 h，温度为25 ℃左右，G值为300 s-1，混匀慢速加氯。

Abstract:: Effects of nitrogen sources, mass ratio of chlorine to nitrogen, pH, reaction time, temperature, G value and chlorine dosing rate on monochloramine (NH₂Cl) concentration and disinfection by-products (DBPs) production in filtered water were systematically investigated in a drinking water treatment plant in Shanghai. It was found that nitrogen sources, mass ratio of chlorine to nitrogen and pH were the main impact factors, while others were the secondary impact factors. Compared to other four kinds of nitrogen sources ［NH₄Cl, (NH₄)₂CO₃, NH₄Ac, and NH₃·H₂O］, a higher concentration of monochloramine was produced when (NH₄)₂SO₄ was the nitrogen source. When pH increased from 6.0 to 9.0, the concentration of NH₂Cl (calculated by the amount of Cl₂) increased from 2.611 mg/L to 4.256 mg/L. As the mass ratio of chlorine to nitrogen increased from 2 ∶1 to 8 ∶1, the concentration of NH₂Cl increased first and then decreased, and it reached the maximum of 3.831 mg/L at 5 ∶1. The total concentration of DBPs increased with the increase of chlorine to nitrogen mass ratio, reaction time, temperature and chlorine dosing rate, and decreased with the increasing G value. However, DBPs concentration decreased first and then increased slightly as the pH value increased from 6.0 to 9.0. The optimum conditions for the formation of monochloramine in the chloramine disinfection process of the drinking water treatment plant were as follows: (NH₄)₂SO₄ as the nitrogen source, Cl₂/N mass ratio of 4 ∶1 to 5 ∶1, neutral or alkaline pH, reaction time of 2 h, temperature of 25 ℃, G value of 300 s^-1 and low chlorine dosing rate.

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[1]刘汝鹏,郝玉友,罗从伟,等.紫外/一氯胺降解水中氯霉素的性能与机理研[J].中国给水排水,2021,37(9):51.
　LIU Ru-peng,HAO Yu-you,LUO Cong-wei,et al.Performance and Mechanism of Chloramphenicol Degradation in Aqueous Solution by Ultraviolet/Monochloroamine[J].China Water & Wastewater,2021,37(3):51.

更新日期/Last Update: 2021-02-01