Formation of organic chloramines during chlor(am)ination and UV/chlor(am)ination of algae organic matter in drinking water.
Formation of organic chloramines during chlor(am)ination and UV/chlor(am)ination of algae organic matter in drinking water.
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DOI：
10.1016/j.watres.2016.07.036
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发表时间：
2016-10
期刊：
影响因子：
12.8
通讯作者：
Tian-Yang Zhang;Yi-Li Lin;Bin Xu;Tuo Cheng;Shengji Xia;W. Chu;N. Gao
中科院分区：
文献类型：
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作者：
Tian-Yang Zhang;Yi-Li Lin;Bin Xu;Tuo Cheng;Shengji Xia;W. Chu;N. Gao
地表水经常遭受藻华和藻类细胞释放藻类有机物（AOM）的问题，从而导致许多水质问题。本研究调查了饮用水中 AOM 的氯（氨）化和紫外线/氯（氨）化过程中有机氯胺和含氮消毒副产物 (N-DBP) 的形成。在氯（氨）化过程中，AOM 比腐殖酸和黄腐酸产生更多的有机氯胺。有机氯胺的生成量随着游离氯投加量的增加先增加后减少，但随着NH2Cl投加量的增加而不断增加。 AOM氯化过程中，随着反应时间的延长，有机氯胺的生成量不断减少，有机氯胺占总氯的比例最大（79.1%）出现在8 h时。然而，在AOM氯胺化过程中，随着反应时间的延长，有机氯胺的形成先增加，随后减少，然后再次增加，并且有机氯胺占总氯的比例最大（22.1%）出现在24 h。紫外辐照预处理并没有有效影响AOM氯化（胺）化过程中有机氯胺的形成，但加速了氯胺化过程中有机氯胺的降解。此外，UV预处理增强了AOM随后氯化（氨）化过程中N-DBPs的形成，尤其是二氯乙腈。
Surface water are frequently subjected to problems of algal blooms and release of algae organic matter (AOM) from the algae cells, which cause many water quality issues. This study investigated the formation of organic chloramines and nitrogenous disinfection by-products (N-DBPs) during chlor(am)ination and UV/chlor(am)ination of AOM in drinking water. AOM caused higher organic chloramine formation than humic acid and fulvic acid during chlor(am)ination. The formation of organic chloramines increased first and then decreased with the increase of free chlorine dosage, but kept increasing with the increase of NH2Cl dosage. During AOM chlorination, the formation of organic chloramines kept decreasing as the reaction time went by, and the maximum organic chloramine proportion (79.1%) in total chlorine occurred at 8 h. However, during AOM chloramination, the formation of organic chloramines increased first, decreased in the following and then increased again as the reaction time went by, and the maximum organic chloramine proportion (22.1%) in total chlorine occurred at 24 h. UV irradiation pretreatment did not effectively influence organic chloramine formation during AOM chlor(am)ination, but accelerated the degradation of organic chloramines during chloramination. Besides, UV pretreatment enhanced the formation of N-DBPs during the subsequent chlor(am)ination of AOM, especially dichloroacetonitrile.