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Assessment of heavy metals in loose deposits in drinking water distribution system
Liu, Quanli; Han, Weiqiang; Han, Bingjun; Shu, Min; Shi, Baoyou
2018-07-01
Source PublicationENVIRONMENTAL MONITORING AND ASSESSMENT
ISSN0167-6369
Volume190Issue:7Pages:-
AbstractHeavy metal accumulation and potential releases from loose deposits in drinking water distribution system (DWDS) can have critical impacts on drinking water safety, but the associated risks have not been sufficiently evaluated. In this work, the potential biological toxicity of heavy metals in loose deposits was calculated based on consensus-based sediment quality guidelines, and the effects of some of the main water quality parameters, such as the pH and bicarbonate and phosphate content, on the release behaviors of pre-accumulated heavy metals were investigated. The results showed that heavy metals (Cu, As, Cr, Pb, and Cd) significantly accumulated in all the samples, but the contents of the heavy metals were multiple magnitudes lower than the Fe and Mn contents. The potential biotoxicity of As and Cu was relatively high, but the biotoxicity of Cd was negligible. The water quality can significantly influence the release of heavy metals from loose deposits. As the pH increased from 7.0 to 9.0, the release of As and Cr obviously increased. The release of As, Cu, Pb, and Cr also accelerated with the addition of phosphate (from 1 to 5 mg/L). In contrast to the trends for the pH and phosphate, variations in the bicarbonate content did not have a significant influence on the release of As and Cr. The release ratios of heavy metals in the samples were very low, and there was not a correlation between the release rate of the heavy metals in the loose deposits and their potential biotoxicity.
Department中国科学院饮用水科学与技术重点实验室
KeywordDrinking water distribution system (DWDS) Loose deposits Heavy metals Biological toxicity Release Water quality
Document Type期刊论文
Identifierhttp://ir.rcees.ac.cn/handle/311016/41319
Collection中国科学院饮用水科学与技术重点实验室
Recommended Citation
GB/T 7714
Liu, Quanli,Han, Weiqiang,Han, Bingjun,et al. Assessment of heavy metals in loose deposits in drinking water distribution system[J]. ENVIRONMENTAL MONITORING AND ASSESSMENT,2018,190(7):-.
APA Liu, Quanli,Han, Weiqiang,Han, Bingjun,Shu, Min,&Shi, Baoyou.(2018).Assessment of heavy metals in loose deposits in drinking water distribution system.ENVIRONMENTAL MONITORING AND ASSESSMENT,190(7),-.
MLA Liu, Quanli,et al."Assessment of heavy metals in loose deposits in drinking water distribution system".ENVIRONMENTAL MONITORING AND ASSESSMENT 190.7(2018):-.
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