不溶性腐殖酸对水中六价铬的吸附行为及影响因素研究

Factors Affecting Chromium Adsorption by Insolubilized Humic Acid in Aqueous Solution

研究了不溶性腐殖酸(IHA)对六价铬的吸附作用及影响因素。进行了反应接触时间、pH、IHA投加量、光照条件等对反应的影响研究,确定了最佳反应条件。同时应用未处理的腐殖酸进行对比研究,实验表明在反应接触时间为60min,pH为7的水溶液条件下不溶性腐殖酸对铬离子去除率可达98%,比未处理的腐殖酸对铬离子的去除率提高近一倍,并拟合了不溶性腐殖酸对铬离子的反应动力学曲线和吸附等温线。

Influence of insolubilized humic acid （IHA）on adsorption of hexavalent chromium in aqueous phase was investigated. Effects of reaction time, pH, concentrations of IHA and adding amount etc. on the reduction of Cr（Ⅵ） were examined while the optimum reaction conditions were determined. Results indicated that the maximum removal efficiency of chromium by insolubilized humic acid was 98% in aqueous solutions with the reaction time of 6h at pH7. The kinetic curves and the adsorption isotherm curves of chromium affected by insolubilized humic acid were stimulated.