核桃壳动态吸附氨氮的影响因素及动力学研究  

Study on influencing factors and kinetics of dynamic adsorption of ammonia nitrogen on walnut shell

作　　者：谢林花[1] 丁绍兰[1] 董凌霄[1] 马蕊婷 

机构地区：[1]陕西科技大学环境科学与工程学院,陕西西安710021

出　　处：《陕西科技大学学报（自然科学版）》2016年第5期34-38,共5页Journal of Shaanxi University of Science & Technology

基　　金：陕西省教育厅专项科研计划项目(15JK1100);陕西科技大学科研项目(ZX11-08)

摘　　要：采用天然核桃壳作为反应柱载体对模拟废水中氨氮进行动态吸附实验.考察了吸附时间、吸附柱沿程高度、进水流速和水样初始pH等因素对核桃壳载体反应柱吸附氨氮效果的影响.结果表明,核桃壳载体反应柱对氨氮的去除率大于陶粒载体反应柱,氨氮去除率随载体装填高度增加显著.进水样初始pH为7.0,流速为20.83mL/min时的氨氮去除率较高.Thomas模型能较好地反映吸附过程特征.从吸附穿透曲线中可见,吸附时间为165 min达到吸附穿透点,600min达到吸附衰竭点.Dynamic adsorption experiment of ammonia nitrogen in wastewater was carried out by using natural walnut shell as the carrier of the reaction column.The effects of adsorption time,the height of the adsorption column,the influent flow rate and the initial pH on the adsorption of ammonia nitrogen in the reaction column of walnut shell were investigated.The results show that the removal rate of ammonia nitrogen is much larger than that of the column,and the removal rate of ammonia nitrogen increases significantly with the increase of the loading height.The initial pH was 7,and the removal rate of ammonia nitrogen was higher when the flow rate was 20.83mL/min.Thomas model can better reflect the characteristics of the adsorption process.From the adsorption breakthrough curve,the adsorption time was 165 min to reach the breakthrough point,and 600 min reached the point of exhaustion.

关 键 词：动态吸附 核桃壳 氨氮 

分 类 号：X832[环境科学与工程—环境工程]