| 磷的吸附对老成土和淋溶土中Cu、Zn离子吸附-解吸及其有效性的影响 |
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| 作者姓名： | LI Xue-Yuan DONG Yuan-Yan LUO Hou-Ting |
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| 作者单位： | [1]KeyLaboratoryofSubtropicalSoilResourcesandEnvironment,ChineseMinistryofAgriculture,HuazhongAgriculturalUniversity,Wuhan430070,China [2]KeyLaboratoryofSubtropicalSoilResourcesandEnvironment,ChineseMinistr |
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| 摘 要： | Surface charge,secondary adsorption-desorption and form distribution of Cu^2 and Zn^2 in Ultisols and Alfisols having adsorbed phosphate were studied by potentiometric titration,adsorption equilibrium and sequential extraction method,respectively,The soil surface negative charges increased whereas the amount sequential extraction method,respectively.The soil surface ngative charges increased whereas the amount of positive charges decreased with increase of P adsorbed,The soil secondary adsorption capacity for Cu^2 and Zn^2 was positively significantly correlated with the amount of P adsorbed by the soils,which could be described by the Langmuir equation.The amounts of Cu^2 and Zn^2 desorption from soils were decreased after P adsorption by the soils and the relationship between them was linear,After the soils adsorbed P,form distribution of Cu^2 and Zn^2 in soils changed remarkably.
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| 关 键 词： | 铜离子 锌离子 磷酸盐 解吸附作用 淋溶土 老成土 吸附作用 |
Effects of phosphate adsorption on adsorption-desorption and availability of Cu and Zn ions in Ultisols and Alfisols |
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| LI Xue-Yuan,DONG Yuan-Yan,LUO Hou-Ting.Effects of phosphate adsorption on adsorption-desorption and availability of Cu and Zn ions in Ultisols and Alfisols[J].Pedosphere,2000,10(4):355-362. |
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| Authors: | LI Xue-Yuan DONG Yuan-Yan and LUO Hou-Ting |
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| Institution: | [1]KeyLaboratoryofSubtropicalSoilResourcesandEnvironment,ChineseMinistryofAgriculture,HuazhongAgriculturalUniversity,Wuhan430070,China [2]KeyLaboratoryofSubtropicalSoilResourcesandEnvironment,ChineseMinistr |
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| Abstract: | Surface charge, secondary adsorption-desorption and form distribution of Cu2+ and Zn2+ in Ultisols and Alfisols having adsorbed phosphate were studied by potentiometric titration, adsorption equilibrium and sequential extraction method, respectively. The soil surface negative charges increased whereas the amount of positive charges decreased with increase of P adsorbed. The soil secondary adsorption capacity for Cu2+and Zn2+ was positively significantly correlated with the amount of P adsorbed by the soils, which could be described by the Langmuir equation. The amounts of Cu2+ and Zn2+ desorption from soils were decreased after P adsorption by the soils and the relationship between them was linear. After the soils adsorbed P,form distribution of Cu2+ and Zn2+ in soils changed remarkably. |
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| Keywords: | adsorption-desorption Alfisol and Ultisol availability Cu2+ and Zn2+ phosphate adsorption |
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