| pH变化条件下针铁矿表面吸附的磷酸盐联合态的转化 |
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| 引用本文： | JIE Xiao-Lei,LIU Fan,ZHOU Dai-Hu,XU Feng-Lin,LI Xue-Yuan,WANG Dian-Fen. pH变化条件下针铁矿表面吸附的磷酸盐联合态的转化[J]. 土壤圈, 1995, 5(3): 229-235 |
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| 作者姓名： | JIE Xiao-Lei LIU Fan ZHOU Dai-Hu XU Feng-Lin LI Xue-Yuan WANG Dian-Fen |
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| 作者单位： | [1]HuazhongAgriculturalUniversity,Wuhan430070,China [2]WuhanUniversityofTechnology,Wuhan430070,China |
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| 基金项目： | *1Project supported by the National Natural Science Foundation of China. |
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| 摘 要： | X-ray photoelectron spectroscopy(XPS) and automatic titrimeter were used to study the relation bewteen pH and the transformation of the coordinate forms of P on goethite surfaces.The results showed that for a given P concentration,increasing the pH of suspension could cause a fast transformation of monodentate complexes of phosphate ions on goethite surfaces to binuclear ones,When lowering the pH,additional adsorption of P occurred and the binuclear complexes reverted slowly to the monodentate ones,The dissociation and association of protons of the sorbed P caused by pH changes was considered to be a major reason leading to the transformation of the coordinate forms of P on the surfaces.The stability of binuclear surface complex of P was greater than that of monodentate omplex.The possible reactions on the interface of goethite and solutions with pH changes,and the reasons causing the different stabilities of the two coordinate P complexes are discussed in the paper.
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| 关 键 词： | pH值 磷酸盐 配位形式 转化 磷吸收 针铁矿表面 土壤 |
Transformation of coordinate forms of phosphate adsorbed on goethite surfaces under conditions of varying pH |
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| JIE Xiao-Lei,LIU Fan,ZHOU Dai-Hu,XU Feng-Lin,LI Xue-Yuan and WANG Dian-Fen. Transformation of coordinate forms of phosphate adsorbed on goethite surfaces under conditions of varying pH[J]. Pedosphere, 1995, 5(3): 229-235 |
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| Authors: | JIE Xiao-Lei LIU Fan ZHOU Dai-Hu XU Feng-Lin LI Xue-Yuan WANG Dian-Fen |
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| Affiliation: | [1]HuazhongAgriculturalUniversity,Wuhan430070,China [2]WuhanUniversityofTechnology,Wuhan430070,China |
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| Abstract: | X-ray photoelectron spectroscopy(XPS) and automatic titrimeter were used to study the relation bewteen pH and the transformation of the coordinate forms of P on goethite surfaces.The results showed that for a given P concentration,increasing the pH of suspension could cause a fast transformation of monodentate complexes of phosphate ions on goethite surfaces to binuclear ones,When lowering the pH,additional adsorption of P occurred and the binuclear complexes reverted slowly to the monodentate ones,The dissociation and association of protons of the sorbed P caused by pH changes was considered to be a major reason leading to the transformation of the coordinate forms of P on the surfaces.The stability of binuclear surface complex of P was greater than that of monodentate omplex.The possible reactions on the interface of goethite and solutions with pH changes,and the reasons causing the different stabilities of the two coordinate P complexes are discussed in the paper. |
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| Keywords: | coordinate form goethite pH phosphate X-ray photoelectron spectroscopy |
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