不同形态氧化锰的水热制备及吸附重金属离子性能  

Hydrothermal synthesis of different manganese oxide and their adsorption performance for heavy metal ion

作　　者：朱秋锋[1] 王丽婷[1] 安泽欢 付蓉[1] 

机构地区：[1]北京工商大学食品学院,北京100048

出　　处：《化工新型材料》2016年第6期184-186,共3页New Chemical Materials

基　　金：北京市教委科研计划项目(KM201410011008);北京工商大学两科基金培育项目(LKJJ2015-13);大学生科学研究与创业行动计划建设项目

摘　　要：以高锰酸钾和硫酸锰为原料,通过水热法合成了α-MnO_2、δ-MnO_2两种多孔材料,并将其用于吸附水中的重金属离子。利用XRD、N_2-吸附脱附和TEM进行了表征,研究了吸附剂种类、重金属离子种类、pH以及吸附时间对吸附效果的影响。结果表明:水热法合成的α-MnO_2和δ-MnO_2两种吸附剂具有晶型完整、颗粒微小,无杂质等特点。相同条件下,δ-MnO_2对Ni ^(2+)、Cu^(2+)和Zn^(2+)的吸附量远大于α-MnO_2;δ-MnO_2对3种重金属离子的吸附容能力随着溶液pH的升高而增大,吸附过程符合准二级吸附速率方程。The two adsorbentsα-,δ-MnO2 were synthesized by hydrothermal method,with manganese sulfate as manganese source and potassium permanganate as oxidant.The as-prepared materials were characterized by XRD,TEM and N2 adsorption-desorption.The influence of type of adsorbents,various heavy metal ions,pH of working solution and adsorption time on adsorption performance of the adsorbents were investigated.The results showed that hydrothermal synthesis ofα-MnO2 and δ-MnO2 would generate pure perfect crystalline with tiny particles,the adsorption capacity of for Ni ^2＋,Cu^2＋and Zn^2＋on δ-MnO2 were much greater than those ofα-MnO2 under the same conditions.The adsorption capacity of three heavy metal ions onδ-MnO2 increased with pH increasing.δ-MnO2 had a greater adsorption capacity and higher adsorption rate for Ni ^2＋,Cu^2＋ and Zn^2＋,which was a fast pseudo-second-order adsorption process.

关 键 词：氧化锰 重金属离子 吸附 PH 机理 

分 类 号：TQ137.12[化学工程—无机化工] X703[环境科学与工程—环境工程]