Pedosphere 1(3): 265--275, 1991
ISSN 1002-0160/CN 32-1315/P
©1991 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Toxicity of Cu and Cd in Soils and Detoxication by Additives |
| GU ZONG-LIAN, WU LIU-SONG, XIE SI-QIN, ZHOU DE-ZHI |
| Institute of Soil Science, Academia Sinica. P.O. Box 821, Nanjing 210008 |
| ABSTRACT |
| Results from laboratory experiments indicated that the concentrations and toxicities of both water-soluble and 0.1 M HCl-extractable Cu and Cd from soils were in the order of red soil> yellow brown earth> black earth. The toxicity of soil varied with the concentrations of metals. The form, concentration and toxicity of Cu and Cd in soils were determined by cation exchange capacity, content of organic matter and composition of clay minerals in the soil. Addition of CaCO3 could significantly decrease the concentration and toxicity of water-soluble and 0.1 M HCl-extractable Cu or Cd from the red soil, and could notably transform the Cu and Cd from the water-soluble or exchangeable form into the organic, free oxides-occluded or sulfic form. |
| Key Words: |
| Citation: Gu, Z. L., Wu, L. S., Xie, S. Q. and Zhou, D. Z. 1991. Toxicity of Cu and Cd in Soils and Detoxication by Additives. Pedosphere. 1(3): 265-275. |
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