摘要
利用Al2(SO4)3对活性炭进行表面改性处理,对比研究未改性活性炭和铝盐改性的活性炭对Cr(Ⅵ)的吸附特性。实验结果表明,铝盐改性的活性炭对Cr(Ⅵ)的吸附效果好;其吸附等温线更加符合Langmuir等温吸附方程,且吸附属于自发的吸热反应,吸附方式以化学吸附为主;其吸附动力学更符合准二级动力学方程,吸附速率受颗粒内扩散和液膜扩散共同限制。
Al2(SO4)3 was used to modify the surface of activated carbon,and the adsorption characteristics of Cr(Ⅵ)on the activated carbon and the aluminum salt-modified activated carbon were compared.The experimental results show that the adsorption effect of the aluminum salt modified activated carbon on Cr(Ⅵ)was improved.The adsorption isotherm was more in line with the Langmuir isotherm adsorption equation,and the adsorption reaction was spontaneous and endothermic.The adsorption kinetics was well described by the quasi-second-order kinetic equation,and the adsorption rate was limited by both intra-particle diffusion and liquid film diffusion.
作者
刘瑞森
杨怡心
井海融
骆欣
LIU Ruisen;YANG Yixin;JING Hairong;LUO Xin(School of Safety Engineering,North China Institute of Science&Technology,Yanjiao,065201,China;School of Environment Engineering,North China Institute of Science&Technology,Yanjiao,065201,China)
出处
《华北科技学院学报》
2020年第1期84-88,共5页
Journal of North China Institute of Science and Technology
基金
中央高校基本科研业务费资助项目(3142014017,3142019048)。
关键词
改性活性炭
Cr(Ⅵ)
吸附
modified activated carbon
chromium
adsorption
