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Influence of coastal groundwater salinization on the distribution and risks of heavy metals
Xiaohu Wen; Lu J(吕剑); Jun Wu
Source PublicationScience of the Total Environment
KeywordCoastal Groundwater Salinization Ecological And Health Risks Heavy Metals
MOST Discipline CatalogueEnvironmental Sciences & Ecology
Contribution Rank[Wen, Xiaohu] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Ecohydrol Inland River Basin, Donggang West Rd 320, Lanzhou 730000, Gansu, Peoples R China; [Lu, Jian; Lin, Yichen; Luo, Yongming] Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Environm Proc & Ecol Remediat, Yantai 264003, Shandong, Peoples R China; [Wu, Jun] Chinese Acad Sci, Qinghai Inst Salt Lakes, Xining 810008, Qinghai, Peoples R China
AbstractCoastal groundwater quality significantly affects the regional sustainable development, due to the water resource shortage in coastal zone. Current studies on coastal groundwater have mainly focused on saline water intrusion and over-extraction. Information on the heavy metal pollution of coastal groundwater with salinization trend is limited. This study investigated heavy metals in groundwater from a typical coastal region with intensive anthropogenic activities and saline water intrusion. The southwestern coastal plains of the study area showed significant groundwater salinization trend. Heavy metals in the coastal groundwater mainly originated from anthropogenic activities and groundwater salinization according to principal component analysis. Relative high concentrations of As, Co, Cr, Cu, Fe, Mn, and Ni occurred in the southwestern coast of the study area with high TDS level, indicating that the concentrations of these heavy metals in shallow aquifer of the study area might be influenced by the groundwater salinization. Average concentrations of heavy metals in groundwater of the study area ranged from 0.03 (Cd) to 686.92 (Fe) mu g/L. Fe was the dominant heavy metal in groundwater with the maximal concentration of 2333.76 mu g/L and exceeding-standard rate reaching 98.23%. Approximately 13.27% of sampling sites showed moderate or higher heavy metal pollution of groundwater based on heavy metal pollution index. Heavy metals in groundwater exerted low ecological risks. Elements Fe, Ni, and As were the main contributors for ecological risks. Cancer risks of heavy metals for both adults and children were high at all sampling sites. Non-cancer risks for adults and children were unacceptable at 4.42% and 17.70% of sampling sites, respectively. The salinization of the coastal groundwater could also lead to the increase in the ecological and health risks of heavy metals in coastal groundwater. These findings provide initial and important information on heavy metals pollution in coastal aquifer with saline water intrusion. (C) 2018 Elsevier B.V. All rights reserved.
Indexed BySCI
WOS Research AreaEnvironmental Sciences
WOS IDWOS:000454418500024
Funding OrganizationNational Natural Science Foundation of China [41671319, 41877131] ; One Hundred Talents Program of Chinese Academy of Sciences [Y629041021, Y610061033] ; CAS "Light of West China Program" ; Key Research Program of Frontier Sciences of CAS [QYZDJ-SSW-DQC015] ; Two-Hundred Talents Plan of Yantai [Y739011021] ; Thousand Talents Plan of Qinghai Province [Y740171071]
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Cited Times:28[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorLu J(吕剑)
Recommended Citation
GB/T 7714
Xiaohu Wen,Lu J,Jun Wu. Influence of coastal groundwater salinization on the distribution and risks of heavy metals[J]. Science of the Total Environment,2019,652(0):267-277.
APA Xiaohu Wen,Lu J,&Jun Wu.(2019).Influence of coastal groundwater salinization on the distribution and risks of heavy metals.Science of the Total Environment,652(0),267-277.
MLA Xiaohu Wen,et al."Influence of coastal groundwater salinization on the distribution and risks of heavy metals".Science of the Total Environment 652.0(2019):267-277.
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