Co-Contamination of Arsenic and Other Trace Elements (Hg, Pb, Al, Fe, Cr, Ni, and Cd) in the Rafsanjan Plain Alluvial Aquifer SE of Iran and Arsenic Risk Assessment
Assessing the concentration of trace elements in aquifers is increasingly subjected to study in Iran due to the lack of groundwater resources. This study was undertaken with the objective of determining trace elements in the alluvial aquifer located in the southern part of the Rafsanjan plain, Kerman province, Iran. The total of 73 groundwater samples from individual water wells were analyzed by atomic absorption spectroscopy (AAS). Results showed that the levels of As, Hg, Pb, Al, Fe, Cr, Ni, and Cd elements were above the World Health Organization standards for drinking-water in some parts of the plain. Thus, statistical data analyses and spatial distribution interpretation were performed to identify the main sources of the pollution. A health risk assessment model derived from US environmental protection agency was applied to calculate the cumulative exposure to As as well as toxic and carcinogenic risks caused by drinking contaminated raw groundwater. Results show that residents of some part of region may suffer from significant adverse toxic health impacts and are exposed to drinking water with As concentrations.
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