Effect of chloramine and its combination with chlorine dioxide on degradation of dissolved organic matter in raw water distribution system

XIANG Kun; YANG Yanling; LI Xing; ZHANG Da; HUANG Liu; CHEN Nan; WANG Shuai

doi:10.11949/j.issn.0438-1157.20141708

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Effect of chloramine and its combination with chlorine dioxide on degradation of dissolved organic matter in raw water distribution system

更新时间：2025-12-10

- Effect of chloramine and its combination with chlorine dioxide on degradation of dissolved organic matter in raw water distribution system
- CIESC Journal Issue 6, Pages: 2262-2267(2015)
- 作者机构：
  
  北京工业大学北京市水质科学与水环境恢复工程重点实验室,北京,100124
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20141708
  CLC： U991.36
- Online First：25 March 2015，
  
  Published：25 March 2015
- 稿件说明：
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XIANG Kun, YANG Yanling, LI Xing, et al. Effect of chloramine and its combination with chlorine dioxide on degradation of dissolved organic matter in raw water distribution system[J]. CIESC Journal, 2015, (6): 2262-2267.
DOI：

XIANG Kun, YANG Yanling, LI Xing, et al. Effect of chloramine and its combination with chlorine dioxide on degradation of dissolved organic matter in raw water distribution system[J]. CIESC Journal, 2015, (6): 2262-2267. DOI： 10.11949/j.issn.0438-1157.20141708.

摘要

采用环状反应器模拟原水输水管道

考察氯胺(NH2Cl)及其与二氧化氯联用(NH2Cl/ClO2)对溶解性有机物(DOM)、溶解性有机碳(DOC)和UV254降解以及有机物荧光特性的影响。结果表明:NH2Cl或NH2Cl/ClO2对DOC、UV254和DOM的降解均产生较大的影响。相比NH2Cl

NH2Cl/ClO2的影响更大

但是有机物降解的恢复速度没有明显差异

DOC、UV254和DOM的降解分别在停止投加氧化剂的第5 d、4 d和1 d恢复。投加氧化剂后

芳香族有机物以向易生物降解的极性有机物的转化为主

溶解性有机物的可生物降解能力增加。NH2Cl和NH2Cl/ClO2作用后

类蛋白质物质以及紫外区类腐殖质类物质明显减少。NH2Cl/ClO2更易破坏有机物中的芳香族化合物的结构

而NH2Cl氧化使得有机物分子结构中羰基、羟基、羧基和胺基等官能团增加

从而有机物可生物降解能力较强。NH2Cl和NH2Cl/ClO2作用后

有机物降解作用可恢复至比未加氧化剂更高的水平

基于卤代副产物生成的考虑

相比NH2Cl

NH2Cl/ClO2更适合用于原水输水管道的氧化。

Abstract

Effects of chloramine (NH2Cl) and its combination with chlorine dioxide(NH2Cl/ClO2)on dissolved organic matter (DOM) were studied by annular reactor. The characteristic of DOM was evaluated by monitoring removal efficiencies of dissolved organic carbon (DOC) and UV254

overall DOM concentration

specific DOM absorbance ratio and excitation-emission matrices spectra (EEMs). The results showed that the oxidants significantly affected the removal of overall DOM

DOC and UV254. The DOM removal efficiency was lower after NH2Cl/ClO2 compared with that of NH2Cl

however

the recovery efficiencies speed of them were similar in the two cases. The degradation of DOM

DOC and UV254 recovered on 5th day

4th day and 1st day after oxidation

respectively. Aromatic rings were substituted predominantly with polar groups after oxidation

and thus the oxidant increased the biodegradable DOM. Overall

DOM fluorescence intensity had a decrease potential after oxidant

particularly for tryptophan-like fluorescence and humic-like fluorescence. The aromatic rings were easier targeted by NH2Cl/ClO2

however

much more functional groups such as hydroxyl

carboxyl and carbonyl

and higher biodegradable DOM were observed after NH2Cl

resulting in higher biodegradation of DOM. The DOC and UV254 degradation after NH2Cl or NH2Cl/ClO2 could both recover to a higher level than that in control. Therefore

compared to single NH2Cl

NH2Cl/ClO2 was proposed to use in the raw water distribution system for decreasing oxidant by-products.

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