One representative water supply system in China with nitrosamine concern: Challenges and treatment strategies
One representative water supply system in China with nitrosamine concern: Challenges and treatment strategies
复制标题
中国具有亚硝胺问题的代表性供水系统：挑战与治理策略
DOI：
10.1016/j.jes.2019.08.005
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发表时间：
2020-02-01
影响因子：
6.9
通讯作者：
Chen, Chao
中科院分区：
文献类型：
--
作者：
Qiu, Yu;Bei, Er;Chen, Chao
为了解华东地区某饮用水处理厂（DWTP）水中N-亚硝胺（NAs）及其前体物在不同季节的变化规律，在2年内进行了4次采样。该供水系统一直面临着与水源水有关的几个亚硝胺挑战，包括水源切换、水源水中高浓度的铵、形成的NAs和NA形成潜力（FP）。此外，臭氧化处理和氯胺化处理也会增加自来水中NDMA的浓度。为了解决这些问题，本污水处理厂采用生物预处理，以降低氨氮和NAs的浓度。以下生物活性炭（BAC）将中和臭氧化带来的亚硝胺增加。与氯胺化相比，在消毒过程中使用游离氯也会减少NDMA的形成。研究结果将使中国其他城市和其他水源受到类似影响的国家受益。(C)2019中国科学院生态环境科学研究中心由爱思唯尔公司出版
Four sampling campaigns were conducted in two years to understand the fluctuation of N-Nitrosamines (NAs) and their precursors in one drinking water treatment plant (DWTP) in East China in different seasons. This water supply system has been facing several nitrosamine challenges related with source water, including the switch of water source, high concentration of ammonium, formed NAs and NA formation potential (FP) in source water. Besides, the use of ozonation in the DWTP and chloramination in networks will increase the NDMA concentration in tap water. To address these challenges, the bio-pretreatment was applied in this DWTP to decrease the concentration of ammonium and NAs. The following biological activated carbon (BAC) will neutralize the nitrosamine increase brought by ozonation. The use of free chlorine in disinfection process will also decrease the NDMA formation compared with chloramination. The results will benefit other cities in China and other countries with similar impacted water sources. (C) 2019 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.