氯胺及其与二氧化氯联用对原水管道溶解性有机物降解的影响

发布时间：2018-03-03 18:15

本文选题：原水管道　切入点：溶解性有机物　出处：《化工学报》2015年06期 　论文类型：期刊论文

【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/Cl O2)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/Cl O2对DOC、UV254和DOM的降解均产生较大的影响。相比NH2Cl,NH2Cl/Cl O2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/Cl O2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/Cl O2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/Cl O2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/Cl O2更适合用于原水输水管道的氧化。
[Abstract]:The annular reactor was used to simulate the raw water pipeline. The effects of chloramine (NH _ 2Cl _ 2Cl _ 2Cl _ 2) and its combination with chlorine dioxide on the degradation of dissolved organic matter (Dom), dissolved organic carbon (DOC) and UV254, and the fluorescence characteristics of organic matter were investigated. The results showed that the degradation of DOCU UV254 and DOM by NH2Cl/Cl O 2 or% NH 2Cl had a significant effect on the degradation of DOCU UV254 and DOM. The influence of NH _ 2Cl _ 2 / Cl _ 2 was greater than that of NH _ 2Cl _ 2 / Cl _ 2. However, there was no significant difference in the recovery rate of organic matter degradation. The degradation of DOM and UV254 recovered on the 5th day and 1 day after the addition of oxidant, respectively. After the addition of oxidant, the conversion of aromatic organic compounds to polar organic compounds that were easily biodegradable was the main factor. When the biodegradability of dissolved organic compounds increased with the action of .NH2Cl and NH2Cl/Cl O2, the protein-like substances and the ultraviolet humus-like substances decreased obviously. NH2Cl-p-ClO2 was more likely to destroy the structure of aromatic compounds in organic compounds. However, the oxidation of NH2Cl increased the functional groups such as carbonyl, hydroxyl, carboxyl and amines in the molecular structure of organic compounds, so that the biodegradability of organic compounds could be improved to a higher level than that without oxidant after the action of NH2Cl and NH2Cl/Cl O2. Considering the formation of halogenated by-products, NH2Cl-NH2Cl- / ClO2 is more suitable for the oxidation of raw water pipeline than NH2Cl-NH2Cl- / ClO2.
【作者单位】：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;
【基金】：国家自然科学基金项目(51178003) 北京市自然科学基金项目(8122013)~~
【分类号】：TU991.2

【参考文献】