Occurrence of Arsenic in Ground Water in the Choushui River Alluvial Fan, Taiwan
Resource
Journal of Environmental Quality 35 (1): 68-75
Journal
Journal of Environmental Quality
Journal Volume
35
Journal Issue
1
Pages
68-75
Date Issued
2006
Date
2006
Author(s)
Abstract
An investigation of shallow ground water quality revealed that high arsenic (As) concentrations were found in both aquifers and aqnitards in the southern Chonshui River alluvial fan of Taiwan. A total of 655 geological core samples from 13 drilling wells were collected and analyzed. High As contents were found primarily in aquitards, to a maximum of 590 mg/kg. The contents were correlated with the locations of the marine sequences. Additionally, strong correlations among the As concentrations of core samples, the clay, and the geological age of the Holocene transgression were identified. Most of the As in ground water originated from the aquitard of the marine sequence. The high As content in marine formations with high clay contents may be attributable to the bioaccumulation of As in the sea organisms, which accrued and were deposited in the formation. A preliminary geogenic model of the origin of the high As concentration in the shallow sedimentary basin of the Chonshui River alluvial fan of Taiwan is proposed. © ASA, CSSA, SSSA.
SDGs
Other Subjects
Aquifers; Groundwater; Rivers; Water pollution; Water quality; Bioaccumulation; Holocene transgression; Sedimentary basin; Arsenic; arsenic; bicarbonate; dissolved organic matter; drinking water; ground water; organic carbon; well water; aquifer; article; bioaccumulation; biotransformation; concentration (parameters); geological time; Holocene; mass spectrometry; river ecosystem; Taiwan; water contamination; water sampling; water standard; X ray photoelectron spectroscopy; Arsenic; Geologic Sediments; Mass Spectrometry; Taiwan; Water Pollutants, Chemical
Type
journal article
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