高温蒸发制备载铁活性炭吸附砷性能研究  

Research on preparation of iron-coated activated carbon by high temperature evaporation and its arsenic adsorping capacity

作　　者：赖卫东[1] 王琳[2] 何勇[2] 唐敏康[2] 王霆[2] 陈苹[2] 

机构地区：[1]江西铜业集团公司德兴铜矿,江西德兴334200 [2]江西理工大学资源与环境工程学院,江西赣州341000

出　　处：《应用化工》2016年第9期1650-1654,共5页Applied Chemical Industry

基　　金：国家自然科学基金资助项目(51178321)

摘　　要：针对水体中砷污染日益严重问题,选用五种不同的铁盐对活性炭进行改性,采用高温蒸发法制备复合材料(GAC-Fe);利用X射线衍射(XRD)和红外光谱(FTIR)对复合材料进行表征;研究了修饰物投加量、铁盐质量、反应液pH值和温度对砷吸附效果影响。结果表明,活性炭负载FeSO_4·7H_2O,投加5 mL H_2O_2制备的复合材料效果最佳;铁盐投加量越多,复合材料的铁含量和吸附容量均增加,但铁析出量也迅速增加;吸附砷在中性条件下效果较好;温度与吸附容量呈负相关,其最大吸附容量为2.551 mg/g;解析实验表明复合材料解吸率达80%,有利于吸附后砷的收集。As arsenic pollution in aqueous solution increasingly prominent,choose five different iron salts to modified activated carbon,which the preparation of composite（ GAC-Fe） by high temperature evaporation method. The composite（ GAC-Fe） were characterized through X-ray diffraction（ XRD） and Fourier transform infrared spectroscopy（ FTIR）. The effect of modifying add dosage,iron salt quality,p H of reaction solution as well as temperature on the adsorption efficiency of arsenic was discussed. The results show that the best preparation condition for GAC-Fe were GAC support FeSO4·7H2O and add dosage 5 m L H2O2; iron content and adsorption capacity increased of composite materials with the increase in initial amount of iron salt,but the iron precipitation amount is rapidly increasing. The adsorption arsenic under the condition of neutral was better; the adsorption capacity decreasing with temperature increasing,the maximum adsorption capacity is 2. 551 mg / g; analytical experiment result show that composite desorption rate was 80%,which conducive to collect arsenic after adsorption.

关 键 词：活性炭 铁盐 吸附 砷 

分 类 号：TQ03[化学工程] X703[环境科学与工程—环境工程]