γ-Al2O3固载水滑石的制备及其动态吸附Cr(Ⅵ)的性能研究

Preparation of γ-AlO Supported Hydrotalcite and Its Dynamic Adsorption for Cr(VI)

以γ-Al2O3、硝酸镁、尿素为主要原料,通过水热法制备γ-Al2O3固载水滑石吸附去除Cr。动态吸附实验的最佳条件为:C=100mg·L-1、V=15mL·min-1、pH=3、m=20g,在此条件下饱和吸附量达到最大值49.2mg·g-1。通过理论分析、实验结果和Thomas模型非线性拟合表明,γ-Al2O3固载水滑石对铬的动态吸附效果良好,是治理水环境中铬污染的一种有效方法。

Theγ-Al2O3 supported hydrotalcite was prepared fromγ-Al2O3,magnesium nitrate and urea by the hydrothermal method,and it was used to adsorb and remove Cr(VI).The optimum conditions of dynamic adsorption experiment were determined as follows:C=100 mg·L-1,V=15 mL·min-1,pH=3、m=20 g.Under above conditions,the saturated adsorption capacity reached the maximum value of 49.2 mg·g-1.Through theoretical analysis,the experimental results and Thomas model nonlinear fitting showed that the dynamic adsorption effect ofγ-Al2O3 supported hydrotalcite on chromium was good,and it was an effective method to control chromium pollution in water environment.