| Kinetic research on the sorption of aqueous cadmium on carbonate hydroxyapatite |
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| 作者姓名： | Yu LIU Huanyan XU |
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| 作者单位： | [1]School of Material Science and Technology, Wuhan Institute of Technology, Wuhan 430073, China [2]School of Municipal andEnvironmental Engineering, Harbin Institute of Technology, Harbin 150001, China |
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| 摘 要： | The sorption of aqueous cadmium on carbonate-hydroxyapatite （CHap） is a complicated non-homogeneous solid/water reaction, From kinetic point of view, it can be described by two stages： at the earlier stage, reaction rate is so fast that its kinetic course is intricate, and at the later stage, the rate of reaction becomes slow and the process of reaction accords with one order reaction kinetic equation. Experimental results show that the relationship between reaction rate constant kl and temperature T accords to Arrhenius Equation, and the activation energy of sorption （Ea） is 6.075 J/mol and frequency factor （A） is 220 s^-1. At the same time, reaction rate constant kl increases with decreasing Cd^2＋ initial concentration, on the contrary, with increasing pH and CHap dosage.
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| 关 键 词： | 羟磷灰石 镉 吸附作用 碳酸盐 水文化学 |
Kinetic research on the sorption of aqueous cadmium on carbonate hydroxyapatite |
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| Yu LIU Huanyan XU.Kinetic research on the sorption of aqueous cadmium on carbonate hydroxyapatite[J].Chinese Journal of Geochemistry,2006,25(B08):104-105. |
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| Abstract: | |
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| Keywords: | arbonate-hydroxyapatite cadmium ion sorption kinetics |
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