Journal
WATER AIR AND SOIL POLLUTION
Volume 197, Issue 1-4, Pages 75-89Publisher
SPRINGER INT PUBL AG
DOI: 10.1007/s11270-008-9792-y
Keywords
Arsenic; Heavy metal; Soil contamination; Tin mine; Tungsten mine; Vietnam
Funding
- Japan Society for the Promotion of Science to KI [15380223, 18380195]
- Grants-in-Aid for Scientific Research [15380223, 18380195] Funding Source: KAKEN
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This study assessed the arsenic and heavy metal contaminations of agricultural soils around the tin and tungsten mining areas in Dai Tu district in northern Vietnam. Among the examined elements, high total contents of As and Cu were found in the agricultural fields at both tin and tungsten mining sites. Although the major part of the accumulated As and Cu were bound by various soil constituents such as Fe and Mn oxides, organic matter, and clay minerals, increases in water soluble As and Cu were observed, especially for the paddy fields. The results suggest that, in the studied area, As and Cu dispersion from their pollution sources into farmlands is mainly via fluvial transportation of mine waste through streams that cross the paddy fields around the tin mining area, and soil erosion at the tea fields located at lower positions of the slope in the tungsten mining area.
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