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Affiliation of Author(s):区域与全球治理高等研究院
Journal:Environmental Geochemistry and Health
Funded by:国家自然科学基金项目
Abstract:Due to the lack of monitoring systems and water purification facilities, residents in western China may face the risk of drinking water pollution. Therefore, 673 samples were collected from Lhasa's agricultural and pastoral areas to reveal the status quo of drinking water. We used inductively coupled plasma-mass spectrometry to determine trace elements concentrations for water quality appraisal, source apportionment, and health risk assessment. The results indicate that concentrations of V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Cd, Ba, and Pb are below the guidelines, while As concentrations in a few samples exceed the standard. All samples were classified into "excellent water" for drinking purpose based on Entropy-weighted water quality index. Thereafter by principal component analysis, three potential sources of trace elements were extracted, including natural, anthropogenic, and mining activities. It is worth noting that geotherm and mining exploitation does not threaten drinking water safety. Finally, health risks were assessed using Monte Carlo technique. We found that the 95th percentiles of hazard index are 1.80, 0.80, and 0.79 for children, teenagers, and adults, indicating a non-carcinogenic risk for children, but no risks for the latter two age groups. In contrast, the probabilities of unacceptable cautionary risk are 7.15, 2.95 and 0.69% through exposure to Cr, Ni, As, and Cd for adults, children, and teenagers. Sensitivity analyses reveal As concentration and ingestion rate are most influential factors to health risk. Hence, local governments should pay more attention to monitoring and removal of As in the drinking water.
Indexed by:Journal paper
Volume:1
Number of Words:10000
ISSN No.:0269-4042
Translation or Not:no
Date of Publication:2023-06-01
First Author:yangzheng
Co-author:Gao Li,Shuan Peng,Pingjian Yang,Yushun Zhao,Gang Liu,Zou Hongyang,Guozhu Mao,Hulin Chen,Umme Marium Ahmad,Xiao Xiao,Xingxing Duan
