铜负载螯合树脂对氨氮的解吸及循环吸附性能  

Ammonia-nitrogen desorption and circulating adsorption ability of copper loaded chelating resin

作　　者：周康根[1] 陈泉洲 姜科[1] 胡元娟[1] 彭佳乐[1] 

机构地区：[1]中南大学冶金与环境学院,湖南长沙410083

出　　处：《中南大学学报（自然科学版）》2015年第11期3999-4004,共6页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(51174238);水体污染控制与治理科技重大专项(20102X07212-008)~~

摘　　要：以铜负载螯合型阳离子交换树脂(R-Cu)为新型氨氮吸附剂,研究解吸剂种类、解吸剂加入量、循环流量对R-Cu树脂的氨氮解吸率的影响,得到树脂的氨氮酸解吸动力学方程,通过循环实验,考察解析后R-Cu树脂的氨氮吸附性能。研究结果表明:HCl对氨氮的解吸效率高于CH_3COOH和CO_2对氨氮的解吸效率;当湿树脂中HCl用量为0.75 mol/L、解析时间为80 min、循环流量为12 L/h时,氨氮解吸率可达93%;氨氮解吸动力学基本符合准二级动力学方程;经吸附–解吸循环5次后,R-Cu树脂对氨氮的吸附性能保持稳定。Copper loaded chelating resin （R-Cu） was prepared as a novel ammonia-nitrogen absorbent. The effects of the species of desorbent, the dosage of desorbent, and the circulation flow on desorption efficiency of ammonia-nitrogen were studied. The equations of ammonia-nitrogen desorption kinetics were obtained. The circulating ammonia-nitrogen adsorption abilities of the R-Cu resin were investigated by circulation experiment. The results show that the desorption ability of HC1 is better than that of CH3COOH and CO2. The desorption efficiency of ammonia-nitrogen is 93% at HC1 dosage in resin of 0.75 mol/L, desoprtion time of 80 min, and circulating flow of 12 L/h. The experimental data of ammonia-nitrogen desorption kinetics fit well in the pseudo-second order kinetic equation. The adsorption ability of the R-Cu resin maintains stable in the adsorption-desorption process for 5 cycles.

关 键 词：载铜树脂 解吸 吸附 氨氮 循环 

分 类 号：X703.1[环境科学与工程—环境工程]