Hg Vertical Transference in Soil Water System *1English Full Text
GUO YIJUN 1, MOU SUSEN 2, QING CHANGLE 2 and CHEN YUCHENG 2 1 Chongqing Bureau of Environmental Protection, Chongqing 400015 (China) 2 Southwest Agricultural University, Chongqing 400716 (China)
Abstract: Hg vertical transference in soil water system was 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.
Keywords：
- Series：
(D) Agriculture; (A) Mathematics/ Physics/ Mechanics/ Astronomy
- Subject：
Physical Geography and Topography; Fundamental Science of Agriculture; Agronomy
- Classification Code：
S153.61
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