期刊
ENVIRONMENTAL SCIENCE & TECHNOLOGY
卷 56, 期 20, 页码 14487-14497出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.est.2c04408
关键词
Disinfection by-products; emerging pollutants; wet deposition; atmospheric particulate matter; atmosphere pollution
资金
- National Natural Science Foundation of China
- Program of Shanghai Academic Research Leader, China
- National Key R&D Program of China
- Shandong Provincial Science and Tech-nology Major Innovation Project
- International Cooperation Project of Shanghai Science and Technology Commission
- Fundamen-tal Research Funds for the Central Universities
- [52170009]
- [52091542]
- [21XD1424000]
- [2021YFC3200700]
- [2020CXGC011406]
- [20230714100]
Snow with large specific surface area and strong adsorption capacity can effectively adsorb atmospheric pollutants, leading to an increase in disinfection by-product (DBP) precursors in surface water. The dissolved organic matter (DOM) in meltwater is mainly composed of low molecular weight organics with low aromaticity and high unsaturation. DBP formation and cytotoxicity indexes in chlorinated meltwater are positively correlated with air quality index and are influenced by snowfall stages. The yield of halonitromethanes in meltwater is significantly higher than that in surface water.
Snow with large specific surface area and strong adsorption capacity can effectively adsorb atmospheric pollutants, which could/might lead to the increase of disinfection by-product (DBP) precursors in surface water. In this study, the contents and characteristics of dissolved organic matter (DOM) in meltwater were investigated, and DBP formation and the DBP-associated cytotoxicity index during chlorination of meltwater was first explored. Overall, meltwater exhibited high nitrogen contents. Meltwater-derived DOM was mainly composed of organics with low molecular weights, low aromaticity, and high unsaturated degrees. DBP formation potentials and cytotoxicity indexes in chlorinated meltwater were positively correlated with air quality index and were significantly impacted by snowfall stages. The trihalomethane and haloacetic acid yields from meltwater were relatively low, while yields of highly cytotoxic DBPs, especially halonitromethanes (6.3-10.8 mu g-HNMs/mg-DOC), were significantly higher than those of surface water (1.7 mu g-HNMs/mg-DOC). Notably, unsaturated nonaromatic organic nitrates in meltwater were important precursors of halonitromethanes. The actual monitoring results showed that snowfall significant increased the haloacetaldehydes and nitrogenous DBP formation levels of surface water. Considering increased DBP formation and DBP-associated toxicity, it was demonstrated that DOM derived from snowfall in atmosphere-polluted areas could deteriorate surface water quality and pose potential risks to drinking water.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据