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研究论文

摘要：采用恒流淋洗法研究了外加锌在石灰性土壤中的吸附动力学特性.通过对石灰性土壤样品,人工模拟样品和纯CaCO₃物质吸附锌的动力学实验,结果衰明,石灰性土壤中的CaCO₃组分是外加锌的主要载体,且被CaCO₃组分所保持的锌不易被0.01mol/LCaCl₂溶液解吸下来。还拟用了几种动力学方程(一级动力学方程,Elovich方程和抛物线扩散方程)对本实验得到的动力学曲线进行描述和数据处理,结果表明石灰性土壤吸附锌的动力学特征主要由土壤中CaCO₃组分决定的。

Abstract：The kinetics of Zn adsorption in calcareous soil was studied using a constant flow leaching method with raw soil, CaCO₃ removed soil, pure CaCO₃ and artificial soil samples, The results of the experiments indicated that CaCO₃ is a major adsorbent for Zn in calcareous soil and the CaCO₃ adsorbed Zn is difficult to be desorbed with 0.01 mol/L CaCl₂. The first-order, Elovich and parabolic diffusion equations were applied to fit the experimental data.