| 摘要: |
| 塿土对锌吸附的过程可以用Langmuir、Freundlich和Temkin方程进行描述;利用Langmuir方程的平衡常数(Ka)可以推求出锌吸附反应的热力学函数——自由能(ΔG°)、焓(ΔH°)和熵(ΔS°),并通过对这些热力学函数的研究得出,塿土对锌的吸附是一个自发的吸热反应,随加入磷浓度的增大,锌的最大吸附量虽有所减小,但吸附强度却在增大;温度的升高,不但会使最大吸附量增大,而且增加土壤对锌的吸附强度。 |
| 关键词: 锌吸附，热力学特性，吸附等温线，热力学函数，吸附强度 |
| DOI： |
| 分类号:S153.61 |
| 基金项目: |
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| Effect of Phosphate on the Thermodynamic Character of Lou Soil Zinc Absorption |
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| Abstract: |
| The reaction of Lou soil zinc absorption can be describedwith Langmuir,
Freundlich and Temkin equations. The thermodynam ic parametres, free energy (ΔG°),
enhalpy (ΔH°) and entropy (ΔS°) of zinc absorption are calculated by using the equilibrium constant (Ka) of Langmuir equation. The results indicate that it is inevitable for
the Lou soil to carry on the absorption process of zinc automatically and endothermically.Though the maximum absorption capacity of zinc is reduced with the increment of
phosphate concentration, the absorption strength is increased. Both the maximum absorption capacity and absorption strength are increased with temperature rising. |
| Key words: Loun soil,zinc absorption,thermodynamic character,isothermal line,thermodynamic parametre,absorption strength |
