| Interaction of Cd and citric acid, EDTA in red soil |
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| 作者姓名： | ZHOU Dong-mei WANG Shen-qiang CHEN Huai-man |
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| 作者单位： | Laboratory of Material Cycling in Pedosphere，Institute of Soil Science，Chinese Academy of Sciences，Nanjing 210008，China. E mail: hmchen@issas.ac.cn |
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| 基金项目： | theNationalNaturalScienceFoundationofChina (No .2 98770 2 7)andthePostdoctoralScienceFoundationof
China |
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| 摘 要： | ＩｎｔｒｏｄｕｃｔｉｏｎＣａｄｍｉｕｍ,ｅｘｉｓｔｅｄｉｎａｇｒｉｃｕｌｔｕｒａｌｓｏｉｌｏｒｅｃｏｌｏｇｉｃａｌｓｙｓｔｅｍｓ,ｃｏｍｅｓｆｒｏｍｔｗｏｍａｉｎｓｏｕｒｃｅｓｉｎｃｌｕｄｉｎｇｎａｔｕｒａｌｐｒｏｃｅｓｓａｎｄａｎｔｈｒｏｐｏｇｅｎｉｃａｃｔｉｖｉｔｙ.Ｃａｄｍｉｕｍｆｒｏｍｔｈｅｌａｔｔｅｒｏｎｅｍｏｓｔｌｙａｐｐｅａｒｅｄｏｎｓｏｉｌｓｕｒｆａｃｅｔｈｕｓｉｔｉｓａｇｒｅａｔｔｈｒｅａｔｔｏｈｕｍａｎｂｅｉｎｇｓ,ａｎｉｍａｌｓａｎｄｐｌａｎｔｓ(Ｎａｉｄｕ,1998;Ｐｕｌｓ,1991).…
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| 关 键 词： | cadmium interaction organic acid red soil |
| 收稿时间： | 2000/1/10 0:00:00 |
| 修稿时间： | 4/5/2000 12:00:00 AM |
Interaction of Cd and citric acid, EDTA in red soil |
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| ZHOU Dong-mei,WANG Shen-qiang,CHEN Huai-man.Interaction of Cd and citric acid, EDTA in red soil[J].Journal of Environmental Sciences,2001,13(2):153-156. |
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| Authors: | Zhou D M Wang S Q Chen H M |
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| Institution: | Laboratory of Material Cycling in Pedosphere, Institute of Soil Science, Chinese Academy of Sciences, |
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| Abstract: | Adsorption and desorption process of cadmium in red soil (Ferrisols) as well as the influence by media's pH were investigated in detail with and without citric acid and EDTA. Experimental results clearly showed that Cd adsorption in red soil was affected significantly by the coexisted organic chemicals. In the presence of citric acid and EDTA, Cd adsorption in red soil increased with pH in acid media but decreased in high pH one. Further studies placed stress on the adsorbed Cd in red soil which was found to be existed mainly as exchangeable one at pH<5 5, and desorption rate by 0 10 mol/L NaNO 3 gave a peak shaped curve due to the difference of specifically and nonspecifically adsorbed Cd with pH's change. |
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| Keywords: | cadmium interaction organic acid red soi |
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