Pedosphere 5(2): 157--162, 1995
ISSN 1002-0160/CN 32-1315/P
©1995 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Influence of pH on chemical forms of phosphate adsorbed on goethite surfaces |
| LIU Fan1, JIE Xiao-Lei1, ZHOU Dai-Hua1, LI Xue-Yuan1, HE Ji-Zheng1, XU Feng-Lin1 and WANG Dian-Fen2 |
1 Wuhan Unzverszty of Technology, Wuhan 450070 (China)
2 Wuhan Unxuersaty of Technology, Wuhan 430070 (China) |
| ABSTRACT |
| Chemical forms of the phosphate adsorbed on goethite surfaces and characteristics of the coordinate groups which exchange with P on goethite surfaces in solutions with different pll values were investigated. Results showed that the chemical forms of P on goethite surfaces changed from the dominance of monodentate corrdination to that of bidentate one with increasing pH of the solution. By influencing types of phosphate ions in solutions, pH affected the chemical forms of P on goethite surfaces. The amount of OH- displaced by phosphate on goethite surfaces was the most at pH 7.0, the second at pH 9.0, and the least at pH 4.5. |
| Key Words: goethite, PH, phosphate adsorption, X-ray photoelectron spectroscopy |
| Citation: Liu, F., Jie, X. L., Zhou, D. H., Li, X. Y., He, J. Z., Xu, F. L. and Wang, D. F. 1995. Influence of pH on chemical forms of phosphate adsorbed on goethite surfaces. Pedosphere. 5(2): 157-162. |
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