生物还原—化学沉淀法自烟气中的SO_2制备ZnS  

Preparation of ZnS from SO_2 in Flue Gas by Biological Reduction-Chemical Precipitation Process

作　　者：唐雪梅[1] 辛宝平[1] 赵博[1] 陈桂淋[1] 李智慧[1] 

机构地区：[1]北京理工大学化工与环境学院,北京100081

出　　处：《化工环保》2006年第3期165-168,共4页Environmental Protection of Chemical Industry

基　　金：国家自然科学基金资助项目(20307002)。

摘　　要：采用生物还原—化学沉淀法自烟气中的SO2制备ZnS,将含有Zn(OH)2杂质的粗品ZnS通过化学提纯制得高纯度ZnS。实验结果表明,采用NH4C l-NH3.H2O混合液对含有Zn(OH)2杂质的粗品ZnS进行提纯的优化条件为:每500m g粗品ZnS加入NH4C l与NH3.H2O摩尔比为1∶1、两组分浓度均为3.0m o l/L的10mLNH4C l-NH3.H2O混合液。X射线衍射分析表明,提纯后的产物粉末全部为ZnS,其纯度与ZnS标准试样相当。ZnS was prepared from SO2 in flue gas by biological reduction-chemical precipitation process, and high-purity ZnS was obtained by chemical purification method from the crude ZnS containing Zn （OH）2. The results show that the optimum conditions of purification using the mixed solution of NH4Cl and NH3 ·H2O are as follow ： the mol ratio of NH4Cl to NH3· H2O is 1 ： 1, the mass concentrations of both components are all 3.0 mol/L and the volume of mixed solution is 10 mL for each 500 mg of crude ZnS. The XRD analysis result indicates that the purified product is pure ZnS with equal purity of standard sample.

关 键 词：硫化锌 化学提纯 烟气 二氧化硫 生物脱硫 

分 类 号：X703[环境科学与工程—环境工程]