Formation of halogenated C-, N-DBPs from chlor(am)ination and UV irradiation of tyrosine in drinking water
Formation of halogenated C-, N-DBPs from chlor(am)ination and UV irradiation of tyrosine in drinking water
复制标题
DOI：
10.1016/j.envpol.2011.09.037
复制
发表时间：
2012-02-01
影响因子：
8.9
通讯作者：
Yin, Daqiang
中科院分区：
文献类型：
--
作者：
Chu, Wenhai;Gao, Naiyun;Yin, Daqiang
研究了酪氨酸氯化（胺化）和紫外光照射过程中卤代含碳（C-）和含氮消毒副产物（N-DBPs）的形成规律。增加氯接触时间和/或Cl-2/Tyr比增加了大多数C-DBPs的形成，除了4-氯苯酚，二氯乙腈和二氯乙酰胺氯仿和二氯乙酸随着pH的增加而增加，二氯乙腈先增加后减少，其他DBPs在pH 7或8时产率最高。氨的加入显着减少了大多数C-DBPs的形成，但增加了4-氯苯酚，二氯乙腈，二氯乙酰胺，三氯乙腈的产量短预氯化接触时间之前，剂量氨。当紫外线照射和氯化同时进行时，相对稳定的C-DBPs的浓度增加，而二氯乙腈，二氯乙酰胺和4-氯苯酚的浓度随着紫外线剂量的增加而降低。此信息被用来开发一个机制模型，从消毒剂与酪氨酸的相互作用形成的中间消毒副产物和最终产品。(C)2011爱思唯尔有限公司保留所有权利。
The formation of regulated and emerging halogenated carbonaceous (C-) and nitrogenous disinfection by-products (N-DBPs) from the chlor(am)ination and UV irradiation of tyrosine (Tyr) was investigated. Increased chlorine contact time and/or Cl-2/Tyr ratio increased the formation of most C-DBPs, with the exception of 4-chlorophenol, dichloroacetonitrile, and dichloroacetamideChloroform and dichloroacetic acid increased with increasing pH, dichloroacetonitrile first increased and then decreased, and other DBPs had maximum yields at pH 7 or 8. The addition of ammonia significantly reduced the formation of most C-DBPs but increased 4-chlorophenol, dichloroacetonitrile, dichloroacetamide, and trichloroacetonitrile yields for short prechlorination contact times before dosing ammonia. When UV irradiation and chlorination were performed simultaneously, the concentrations of the relatively stable C-DBPs increased, and the concentrations of dichloroacetonitrile, dichloroacetamide, and 4-chlorophenol decreased with increasing UV dose. This information was used to develop a mechanistic model for the formation of intermediate DBPs and end products from the interaction of disinfectants with tyrosine. (C) 2011 Elsevier Ltd. All rights reserved.