| 土-水体系中Hg的垂直迁移 |
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| 作者姓名： | GUO Yi-Jun MOU Su-Sen QING Chang-Le CHEN Yu-Cheng |
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| 作者单位： | Chongqing Bureau of Environmental Protection, Chongqing 400015 (China);;Southwest Agricultural University, Chongqing 400716 (China);Southwest Agricultural University, Chongqing 400716 (China);Southwest Agricultural University, Chongqing 400716 (China) |
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| 基金项目： | *1Project (No. 910604) supported by the State Education Commission of China. |
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| 摘 要： | Hg vertical transference in soil-water system w as studied by analyzing Hg vertical distribution in soil column after adding Hg and one of the two leacheates, deionized water or acid rain, into soil column. The results indicated that Hg was hardly transferable in purple soil. About 86% ~ 88% of the total soil Hg was distributed in the top layer (0~2 cm) and no Hg was detected in the leakage when the purple soil column was leached by deionized water and simulated acid rain. But Hg was more movable in yellow soil with only about 20%~22% of the total soil Hg distributed in the top layer (0~2 cm), and about 17%~25% washed out from the soil column by deionized water and simulated acid rain. Increment in soil bulk density could reduce Hg leaching, thus the more the Hg kept in soil, the less the Hg leached into underground water. Deionized water and acid rain almost played the same role in leaching Hg. Bentonite was most efficient in preventing Hg from vertical transferring in the soil column.
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| 关 键 词： | 重金属污染 土壤－植物系统 书评 环境科学 砷 镉 铜 铬 汞 铅 锌 |
Hg vertical transference in soil-water system |
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| GUO Yi-Jun,MOU Su-Sen,QING Chang-Le,CHEN Yu-Cheng.Hg vertical transference in soil-water system[J].Pedosphere,1998,8(2):187-191. |
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| Authors: | GUO Yi-Jun MOU Su-Sen QING Chang-Le and CHEN Yu-Cheng |
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| Institution: | Chongqing Bureau of Environmental Protection, Chongqing 400015, China. |
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| Abstract: | Vertical movement of Hg in the soil-water system was studied by analysing Hg vertical distribution in soil column after adding Hg and one of the two leachates, deionized water or acid rain, into the soil column. The results indicated that Hg was hardly transferable in acidic purple soil (Regosols). Approximately 86-88% of the total soil Hg was distributed in the top layer (0-2 cm) and no Hg was detected in the leakage when the purple soil column was leached by deionized water and simulated acid rain. Mercury was more movable in yellow soil (Cambisol) with only about 20-22% of the total soil Hg distributed in the top layer, and about 17-25% washed out from the soil column by deionized water and simulated acid rain. Increments in soil bulk density could reduce Hg leaching, thus the more the Hg kept in soil, the less the Hg leached into the groundwater. Deionized water and acid rain played a similar role in leaching Hg. Bentonite was most efficient in preventing Hg from vertical movement in the soil column. |
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| Keywords: | Hg soil vertical transference |
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