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| Speciation, distribution and sources of heavy metals in agricultural soils from the mining area of Longjiao Mountain in Daye City |
| Received:August 29, 2016 |
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| KeyWord:heavy metal pollution;sulfide minerals;mine soil;fractionation;correlation |
| Author Name | Affiliation | E-mail | | JIA Zhao-heng | Key Laboratory of Arable Land Conservation(Middle and Lower Reaches of Yangtze River), Ministry of Agriculture, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China | | | LUO Yao | Key Laboratory of Arable Land Conservation(Middle and Lower Reaches of Yangtze River), Ministry of Agriculture, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China | | | SHEN You-gang | Key Laboratory of Arable Land Conservation(Middle and Lower Reaches of Yangtze River), Ministry of Agriculture, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China | | | LIU Fan | Key Laboratory of Arable Land Conservation(Middle and Lower Reaches of Yangtze River), Ministry of Agriculture, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China | | | CAI Chong-fa | Key Laboratory of Arable Land Conservation(Middle and Lower Reaches of Yangtze River), Ministry of Agriculture, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China | | | TAN Wen-feng | Key Laboratory of Arable Land Conservation(Middle and Lower Reaches of Yangtze River), Ministry of Agriculture, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China | | | QIU Guo-hong | Key Laboratory of Arable Land Conservation(Middle and Lower Reaches of Yangtze River), Ministry of Agriculture, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China | qiugh@mail.hzau.edu.cn |
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| Abstract: |
| In this work, the physical and chemical properties of soil and distribution of heavy metals were determined along the river in the mining area of Longjiao Mountain in Daye City. Tessier five-step sequential extraction procedure was used to determine different speciation of heavy metals including Mn, Cu, Zn, Pb, Cr, Ni and Cd. The correlation between the contents of heavy metals and Fe, S in soils was analyzed. The results indicated that the contents of all heavy metals in almost selected soils exceeded the soil background values of Hubei Province. The total contents of Cu and Cd were higher than the soil environmental quality standard(Grade Ⅲ)(GB 15618-1995) limits, and the total contents of Zn, Pb, Cr, and Ni were lower than the level of the soil environmental quality standard(Grade Ⅱ). Mn, Cu, Zn, Pb, Ni and Cd mainly existed as residual fraction and the Fe-Mn oxide fraction, and some Pb, Cr, and Cd existed as ion-exchangeable fraction. Pyrite and chalcopyrite were found to be the main components in mine ores. The contents of Mn, Cu, Pb, Zn, and Cd existing as residual fraction, Fe-Mn oxide fraction, and their total contents exhibited significantly positive correlation with total contents of Fe and S in soils. These results further suggested that the accumulation of Mn, Cu, Pb, Zn and Cd was resulted from the exploitation of sulfide minerals. |
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