硝酸盐污染物在不同介质下的最大吸附量研究

摘要

In order to investigate the maximum adsorption of nitrate under different medium, through static test, adsorption of nitrate under different medium was studied. Drawing Langmuir isothermal absorption curve according to data, the results showed that the maximum adsorption varied from different medium. Silty clay had a maximum adsorption of qm=35. 72 mg/kg which was mainly due to the different effect made by size of solution mediated plasmid and specific surface area on adsorption process. Slity clay has the largest specific surface area and the smallest diameter which has more obvious adsorption effect.%为探讨不同介质对硝酸盐污染物的吸附情况，通过静态试验，探究了细砂、黄土、粉质粘土三种介质对硝酸盐的吸附效果，以期为硝酸盐污染的治理提供参考。根据试验测定的结果绘制Langmuir等温吸附曲线，结果表明不同介质对硝酸盐污染物的最大吸附量不同，且以粉质粘土的吸附量最大， qm=35.72 mg/kg。其原因主要来自于溶液介质粒径大小及比表面积对吸附过程产生不同的影响，粉质粘土粒径最小且比表面积最大故对硝酸盐污染物产生的吸附效果更明显。