[1]KANG Chenyu,HE Zehao,YU Yajun.Evaluation on Heavy Metal Contents of Soil in Coal Waste Pile After Reclamation[J].Research of Soil and Water Conservation,2017,24(05):343-346.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
24
Number of periods:
2017 05
Page number:
343-346
Column:
Public date:
2017-10-28
- Title:
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Evaluation on Heavy Metal Contents of Soil in Coal Waste Pile After Reclamation
- Author(s):
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KANG Chenyu, HE Zehao, YU Yajun
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College of Geography Sciences, Shanxi Normal University, Linfen, Shanxi 041000, China
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- Keywords:
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reclaimed soil; reclamation year; coal waste pile; heavy metals in soil; ecological risk
- CLC:
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X53;X752
- DOI:
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- Abstract:
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To evaluate the effects of reclamation years on heavy metals in coal waste pile soil, coal mine reclamation soils with reclamation years of 3 years, 5 years, 7 years and 9 years were examined in Cao village in Huozhou, Shanxi Province, the contents and pollution status of heavy metals Hg, Cd, Pb, As and Ni in reclamation soil were analyzed. The results showed that: (1) the contents of soil heavy metals in soil layers of 0—20 cm and 20—40 cm had the increasing trend over years, the contents of Pb and Cd increased most obviously, while the increasing trend of Hg content occurred in 20—40 cm soil layer; meanwhile, the heavy metal contents in coal waste pile reclamation soil were higher than those in farmland soil in different degrees, especially in 20—40 cm soil layer; (2) single factor pollution index showed that the contents of Hg and As in 0—20 cm and 20—40 cm soil layers did not change with years, which were severe pollution and slight pollution, respectively; the contents of Pb and Cd in 0—20 cm soil layers did not change, which were slight pollution and light pollution, respectively, but increased with years to light pollution and moderate pollution in the 20—40 cm soil layer; the comprehensive pollution index showed that heavy metal pollution in reclaimed land in 0—20 cm and 20—40 cm soil layers presented the increasing trend with the reclamation years, and 4 types of reclaimed lands all suffered the severe pollution. The research results are helpful to guide the rational use of coal waste pile reclamation land and vegetation restoration.