State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China.
State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China.
Sci Total Environ. 2021 Jan 15;752:141470. doi: 10.1016/j.scitotenv.2020.141470. Epub 2020 Aug 5.
Many traditional drinking water treatment processes have limited removal efficiencies on natural organic matter (NOM) and organic micropollutants (OMPs), and thus may lead to the production of harmful disinfection byproducts (DBPs). We examined four kinds of anion exchange resins (D205, D213, NDMP-3, and M80) in conjunction with chlorination in the treatment of drinking water. Five categories including 40 OMPs at environmentally relevant concentrations were analyzed. M80 showed the best performance to remove OMPs in water. However, it was vulnerable to the presence of humic acid (HA), indicating its limitation on removing OMPs and NOM at the same time. In contrast, D205, D213, NDMP-3 resins were less affected by HA. Besides, D205, D213 and NDMP-3 provided higher efficiencies on the reduction of DBPs than M80. The amount of trihalomethanes (THMs) lowered by 42.7%, 37.6%, 32.1%, and 0%, whereas haloacetic acids (HAAs) were decreased by 34.0%, 31.2%, 23.0%, and 17.9% by D205, D312, NDMP-3, and M80. Notably, D205 showed the highest removal effects on the bromide ion, brominated THMs, and HAAs, supporting that D205 can be a selective resin for the treatment of drinking water in high bromide-containing areas.
许多传统的饮用水处理工艺对天然有机物（NOM）和有机微量污染物（OMPs）的去除效率有限，因此可能导致有害消毒副产物（DBPs）的产生。我们研究了四种阴离子交换树脂（D205、D213、NDMP-3 和 M80）与氯化联用在饮用水处理中的应用。分析了 5 类共 40 种环境相关浓度的 OMPs。M80 对水中 OMPs 的去除效果最好。然而，它易受腐殖酸（HA）的影响，表明其同时去除 OMPs 和 NOM 的能力有限。相比之下，D205、D213 和 NDMP-3 受 HA 的影响较小。此外，D205、D213 和 NDMP-3 比 M80 更能有效地降低 DBPs 的生成量。三卤甲烷（THMs）的生成量降低了 42.7%、37.6%、32.1%和 0%，而卤乙酸（HAAs）的生成量则降低了 34.0%、31.2%、23.0%和 17.9%，分别为 D205、D312、NDMP-3 和 M80。值得注意的是，D205 对溴离子、溴代 THMs 和 HAAs 的去除效果最高，表明 D205 可以成为高溴含量地区饮用水处理的选择性树脂。
