海绵状镍印迹壳聚糖吸附剂对软锰矿脱硫尾液中镍离子的选择性去除性能研究  

Selective Removal of Nickel Ions from Desulphurization Tailing of Pyrolusite by Spongy Nickel-imprinted Chitosan Adsorbent

作　　者：郭娜[1,2] 赵莹[1] 刘洁岭[1] 廖兵 GUO Na;ZHAO Ying;LIU Jieling;LIAO Bing(Sichuan Engineering Research Center for Resource Utilization of Municipal Sludge for Building Materials,Sichuan College of Architectural Technology,Deyang 61800,China;Deyang Research Center of Building Materials and Environmental Resource Engineering Technology,Sichuan College of Architectural Technology,Deyang 618000,China;College of Ecology and Environment,Chengdu University of Technology,Chengdu 610059,China)

机构地区：[1]四川建筑职业技术学院四川省城市污泥建材资源化利用工程研究中心,四川德阳618000 [2]四川建筑职业技术学院德阳市建材环保资源化工程研究中心,四川德阳618000 [3]成都理工大学生态环境学院,四川成都610059

出　　处：《湿法冶金》2024年第5期566-572,共7页Hydrometallurgy of China

基　　金：四川省教育厅计划项目(16ZB0517);四川建筑职业技术学院科技项目(2023KJ07)。

摘　　要：为了选择性去除软锰矿脱硫尾液中镍离子以提高硫酸锰纯度,以壳聚糖为基体,研究了采用离子印迹法和化学发泡法制备海绵状镍印迹壳聚糖吸附剂Ni^(2+)-IIP,探讨了其在模拟二元溶液中的竞争和选择性吸附行为,并考察了温度、吸附时间和脱硫尾液pH对实际软锰矿脱硫尾液中镍离子吸附量和去除率、锰离子损失率的影响。结果表明:在模拟二元溶液中,虽然锰镍离子之间存在竞争吸附,但是Ni^(2+)-IIP仍对镍离子保持了较高的选择性;在实际软锰矿脱硫尾液中,当pH=5.0、吸附温度40℃、吸附时间1440 min时,镍离子吸附量和去除率分别为15.3 mg/g和90%,而锰离子损失率约11%;经过5次吸附—解吸循环,Ni^(2+)-IIP对脱硫尾液中镍的吸附量仅降低13.1%,再生性能良好。Ni^(2+)-IIP能选择性地去除脱硫尾液中的镍离子,实现硫酸锰溶液提纯。In order to selectively remove nickel ions from the desulphurization tailing of pyrolusite and improve the purity of manganese sulfate,the spongy nickel-imprinted chitosan adsorbent Ni^(2+)-IIP was prepared by ion imprinting method and chemical foaming method on chitosan matrix,and its competition and selective adsorption behavior in simulated binary solution were discussed.The effects of temperature,adsorption time and desulphurization tailing pH on the adsorption amount and removal rate of nickel ions and the loss rate of manganese ions in the desulphurization tailing of pyrolusite were also investigated.The results show that in the simulated binary solution,Ni^(2+)-IIP still maintains high selectivity for nickel ions,although there is competitive adsorption between manganese and nickel ions.In the actual desulphurization tailing of pyrolusite,under the conditions of pH=5.0,adsorption temperature of 40℃and adsorption time of 1440 min,the adsorption capacity and rate of removal of Ni^(2+)is 15.3 mg/g and 90%,respectively,and the loss rate of manganese ions is about 11%.After 5 adsorption—desorption cycles,the adsorption capacity of Ni^(2+)-IIP for nickel ions in the desulphurization tailing reduces 13.1%,and the regeneration performance is good.Ni^(2+)-IIP can selectively remove nickel ions from the desulphurization tailing,and purify the manganese sulfate solution.

关 键 词：海绵状镍印迹壳聚糖吸附剂 软锰矿 离子印迹 镍 选择性 去除 吸附 

分 类 号：TF815[冶金工程—有色金属冶金] TQ424[化学工程] O647.3[理学—物理化学]