复合可渗透性反应材料修复氨氮污染地下水的吸附反应及其动力学

Adsorption Reaction and Kinetics of Composite Permeable Reactive Materials for Rehabilitation of Groundwater Contaminated by Ammonia Nitrogen

针对受氨氮污染的地下水,制备了柏木屑和高岭土复合材料,研究其作为地下水修复可渗透性反应墙(PRB)吸附材料的吸附特性和反应动力学。结果表明,吸附时间在10 min后达到平衡,吸附量随着氨氮初始浓度的增加而增加,温度对吸附量的影响不大;二级吸附动力学能较好地反映柏木屑和高岭土复合材料对氨氮的吸附情况。

Cedar sawdust and kaolin composites were prepared for groundwater contaminated by ammonia nitrogen. The adsorption characteristics and reaction kinetics of cedar sawdust and kaolin composites as adsorbents of permeable reactive wall(PRB) for groundwater remediation were studied. The results showed that the adsorption time reached equilibrium after 10 minutes, and the adsorption capacity increased with the increase of initial concentration of ammonia nitrogen, while the temperature had little effect on the adsorption capacity. The second-order adsorption kinetics could better reflect the adsorption of ammonia nitrogen by Cedar sawdust and kaolin composites.