Geochemical Investigation on Arsenic Contamination in the Alluvial Ground-water of Mankyeong River Watershed

被引：0

作者：

Moon, Jeong-Tae ^{[1
]}

Kim, Kangjoo ^{[1
]}

Kim, Seok-Hwi ^{[1
]}

Jeong, Cheon-Sung ^{[1
]}

Hwang, Gab-Soo ^{[1
]}

机构：

[1] Kunsan Natl Univ, Sch Civil & Environm Engn, Jeonbuk 573701, South Korea

来源：

ECONOMIC AND ENVIRONMENTAL GEOLOGY | 2008年 / 41卷 / 06期

关键词：

arsenic; groundwater; alluvial aquifer; reductive dissolution of Fe (hydro) oxide; agrochemicals;

D O I：

暂无

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

As-rich alluvial groundwaters occurring in the agricultural area of Mankyeong River watershed were geochemically studied. 15 out of 29 investigated wells (52%) showed As levels exceeding the WHO drinking water standard (10 mu g/L). Their chemistry is characterized by low Eh levels, low NO3 and SO4 concentrations, and high pH, alkalinity, Fe, NH4, and PO4 levels. This suggests that arsenic is enriched by the reductive dissolution of As-bearing Fe-/Mn-(hydro) oxides, the commonest process in Bangladesh and West Bengal of India, of which groundwaters are severely contaminated by As. It was also revealed that As concentrations in the area are strongly regulated by the presence of agrochemicals such as NO3 and SO4.

引用

页码：673 / 683

页数：11

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