| Analysis and evaluation of the characteristics of heavy metals contaminating farmland soil around Lantian Smelter |
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| DOI：10.7606/j.issn.1000-7601.2009.05.48 |
| Key Words: smelter farmland heavy metal distribution law pollution evaluation |
| Author Name | Affiliation | | ZHANG Sujuan | College of Tourism and Environmental Sciences Shaanxi Normal University, Xi’an, Shaanxi 710062, China | | XIAO Ling | College of Tourism and Environmental Sciences Shaanxi Normal University, Xi’an, Shaanxi 710062, China | | GUAN Shuaipeng | College of Tourism and Environmental Sciences Shaanxi Normal University, Xi’an, Shaanxi 710062, China | | ZHANG Yaohua | College of Tourism and Environmental Sciences Shaanxi Normal University, Xi’an, Shaanxi 710062, China | | ZHANG Jun | College of Tourism and Environmental Sciences Shaanxi Normal University, Xi’an, Shaanxi 710062, China | | CHENG Dongge | College of Tourism and Environmental Sciences Shaanxi Normal University, Xi’an, Shaanxi 710062, China |
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| Abstract: |
| To understanding the soil pollution of smelting, the spatial distribution characteristics of the heavy metals content in farmland soils around the Lantian Smelter were studied, and the heavy metal pollution level was evaluated with pollution index method, providing a basis for preventing future contamination of heavy metals and remediating soil pollution.The results showed that at horizontal directions the highest content of Pb, Zn, Cu and Cd were up to 1 341.693 mg/kg, 188.877 mg/kg, 251.015 mg/kg and 21.810 mg/kg, and were 3.833, 0.630, 2.510 and 36.349 times that of the national soil environment quality standard (level 2) in the topsoil 100 meters from a smelter, respectively.The content of these four heavy metals in topsoil first rose, then declined, and finally tend to steady with the increasing distance between sampling spot and the smelter.Heavy metal content decreased with soil depth in profile soil, and it decreased significantly in the layers of 0～35 cm, while changed smoothly under 35cm soil layers.In regard to combined pollution index, all the sampling spots in topsoil and profile soil were far over 3, which indicated that this area has been severely polluted. |
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