甘油改性玉米芯对水中铜(II)和铬(VI)的吸附研究  

Adsorption Characteristics of Cu(II) and Cr(VI) in Aqueous Solution by Glycerol Modified Corn Cob

作　　者：于敏[1] 王传岭[1] 陈观风 Yu Min;Wang Chuanling;Chen Guanfeng(Medical College Of Jiaying University,Meizhou 514031,China)

机构地区：[1]嘉应学院医学院

出　　处：《山东化工》2019年第24期244-247,共4页Shandong Chemical Industry

基　　金：梅州市科技计划项目(2016B060);嘉应学院医学院青年教师科研成长基金项目(2017A01)

摘　　要：以甘油改性的玉米芯为吸附剂,吸附水中的铜(II)和铬(VI),并对吸附的一些影响因素进行了研究,得出最佳吸附条件。结果表明:在20℃下,投加吸附剂1.5g/100mL于含铜(II)初浓度为15μg/mL的溶液中,吸附时间为40min,吸附率可高达96.8%,在50℃下投加吸附剂2.5g/100mL于含铬(VI)初浓度为10μg/mL、pH值为1的溶液中,吸附时间为55min,吸附率可达65.5%。甘油改性玉米芯对铜(II)的吸附符合Langmuir等温方程、吸附动力学符合准二级动力学方程;对铬(VI)的吸附Freundlich等温方程、吸附动力学符合准二级动力学方程。The adsorption parameters of glycerol modified corncobs that were used as adsorbent to remove Cu(II) and Cr(VI) in aqueous solution were investigated,and optimal adsorption conditions were obtained. Results showed that suitable condition for adsorption of Cu(II) were the temperature of 20 ℃,the adsorbent dosage of 1.5 g/100 mL,the highest adsorption efficiency can be 96.8%,suitable condition for adsorption of Cr(VI) were the temperature of 50 ℃,the adsorbent dosage of 2.5 g/100 mL,the highest adsorption efficiency can be 65.5%.The adsorption of Cu(II) by glycerol modified corncobs can be described well by the Langmuir isothermal equation and the adsorption kinetics law cnformed to pseudo-second-order kinetic equation. The adsorption of Cr(VI) by glycerol modified corncobs can be described well by the Freundlich isothermal equation and the adsorption kinetics law cnformed to pseudo-second-order kinetic equation.

关 键 词：玉米芯 吸附 铜 铬 改性 

分 类 号：X703[环境科学与工程—环境工程]