Novel insights into impacts of the "7.20" extreme rainstorm event on water supply security of Henan Province, China: Levels and health risks of tap water disinfection by-products

被引：9

作者：

Chen, Xing ^{[1
,2
]}

Huang, Shuai ^{[1
]}

Chen, Xing ^{[1
,2
]}

Du, Lingnan ^{[1
]}

Wang, Zongwu ^{[1
]}

Liang, Yingying ^{[1
]}

Zhang, Wan ^{[1
]}

Feng, Jinglan ^{[3
]}

机构：

[1] Yellow River Conservancy Tech Inst, Kaifeng Key Lab Food Compositionand Qual Assessme, Sch Environm Engn, Henan Engn Technol Res Ctr Green Coating Mat, Kaifeng 475000, Henan, Peoples R China

[2] Univ Sci & Technol Beijing, Sch Energy & Environm Engn, Beijing 100083, Peoples R China

[3] Henan Normal Univ, Key Lab Yellow River & Huai River Water Environm, Sch Environm, Henan Key Lab Environm Pollut Control,Minist Educ, Xinxiang 453007, Henan, Peoples R China

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2023年 / 452卷

基金：

中国国家自然科学基金;

关键词：

7.20" Extreme rainstorm event; Disinfection by-products (DBPs); Tap water; Comprehensive assessment; DRINKING-WATER; CANCER-RISK; HALOGENATED ACETONITRILES; DEVELOPMENTAL TOXICITY; GENOTOXIC ACTIVITY; HALOACETIC ACIDS; ORGANIC-MATTER; TRIHALOMETHANES; EXPOSURE; HALOACETONITRILES;

D O I：

10.1016/j.jhazmat.2023.131323

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Spatial distributions, levels, and comprehensive assessments of post-flood tap water disinfection by-products (DBPs) were first studied in Henan Province after the "7.20" Extreme Rainstorm Event in 2021. DBPs levels and health risks in tap water were higher in areas flooded (waterlogged) by storm or upstream flood discharge (WA) and rainstorm-affected areas (RA) compared with other areas (OA), suggesting that extreme rainstorm and flooding events may somehow exacerbate DBPs contamination of tap water through disinfection. WA sites were characterized as contamination hotspots. The results revealed high haloacetic acids (HAAs) levels in WA (Avg: 57.79 mu g center dot L-1) and RA (Avg: 32.63 mu g center dot L-1) sites. Compared with normal period, DBPs-caused cancer risk increased by 3 times, exceeding the negligible risk level. Cancer risk came primarily from the ingestion of tri-halomethanes (THMs) (>80%), children were the sensitive group. Those between 30 and 69 showed approximately 1.7 times higher disability-adjusted life yearsper person-yearthan other age groups. Apart from regulated DBPs, bromochloracetic acid (BCAA) and dibromoacetonitrile (DBAN) appear to be the main toxicity contributors in these samples. Our results provide a scientific basis for preventing and controlling health risks from tap water DBPs and for assessing the social benefits and burdens of emergency disinfection.

引用

页数：13

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