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Risk assessment of heavy metals in pipe scales and loose deposits formed in drinking water distribution systems
Gao, Jiali; Liu, Quanli; Song, Laizhou; Shi, Baoyou
2019-02-20
Source PublicationSCIENCE OF THE TOTAL ENVIRONMENT
ISSN0048-9697
Volume652Pages:1387-1395
AbstractThe accumulation of inorganic contaminants in drinking water distribution systems (DWDS) can greatly threaten water quality and safety. This work mainly focused on the accumulation, speciation and risk assessment of inorganic contaminants found in pipe scales and loose deposits in DWDS. Global contamination factor (GCF), risk assessment code (RAC) and consensus-based sediment quality guidelines (CBSQGs) were adopted for the potential health risk assessment of inorganic contaminants. The Tessier sequential extraction method was used to study the speciation distribution of inorganic contaminants in fourteen samples (six pipe scale samples, eight loose deposit samples) collected from real DWDS. The significant correlation between Al and Mn showed there was a co-occurrence behavior of Al and Mn in pipe scales and loose deposits. In addition to the possible interactions between Al and Mn, Ba, Cu and As were possibly accumulated during the formation of Al and Mn commixtures. Mn, Cu, Pb, Zn, Ni, Co and Ba in the samples were mainly associated with the Fe-Mn oxides fraction, which indicated Fe-Mn oxides might play an important role in the accumulation and release of these inorganic contaminants. Fe, Al, As, Cr, V and Cd mainly existed in the residual fraction, which indicated their low mobility. The GCF results demonstrated that most of the sample sites had a certain environmental risk. The RAC results showed that high risk mainly resulted from Cd both in pipe scales and loose deposits. According to the CBSQGs evaluation, heavy metals in loose deposits were more harmful, and Ba exhibited the highest risk among all heavy metals. (C) 2018 Elsevier B.V. All rights reserved.
Department中国科学院饮用水科学与技术重点实验室
KeywordPipe scale Loose deposit Drinking water distribution system Tessier sequential extraction Risk assessment
Document Type期刊论文
Identifierhttp://ir.rcees.ac.cn/handle/311016/43519
Collection中国科学院饮用水科学与技术重点实验室
Affiliation1.Yanshan Univ, Coll Environm & Chem Engn, Qinhuangdao 066004, Peoples R China
2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Drinking Water Sci & Technol, Beijing 100085, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Gao, Jiali,Liu, Quanli,Song, Laizhou,et al. Risk assessment of heavy metals in pipe scales and loose deposits formed in drinking water distribution systems[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2019,652:1387-1395.
APA Gao, Jiali,Liu, Quanli,Song, Laizhou,&Shi, Baoyou.(2019).Risk assessment of heavy metals in pipe scales and loose deposits formed in drinking water distribution systems.SCIENCE OF THE TOTAL ENVIRONMENT,652,1387-1395.
MLA Gao, Jiali,et al."Risk assessment of heavy metals in pipe scales and loose deposits formed in drinking water distribution systems".SCIENCE OF THE TOTAL ENVIRONMENT 652(2019):1387-1395.
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