Study of thermodynamics and kinetics of adsorption of rhodamine B wastewater on ZIF-8
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摘要:
采用液相扩散法制备沸石咪唑酯骨架材料ZIF-8吸附剂,并对其结构进行了表征.以罗丹明B溶液为模拟染料废水,考察了ZIF-8的用量、废水浓度、pH、吸附温度等因素对吸附效果的影响,并进一步研究了其吸附热力学和动力学特征.结果表明:在200 mL质量浓度为10 mg/L的罗丹明B溶液中,ZIF-8投加量为200 mg时,对其吸附率可达85%以上.该过程是一个自发吸热的物理吸附过程,符合准一级动力学模型.
Liquid phase diffusion method was adopted to prepare ZIF-8 adsorbent,and the structures of ZIF-8 were characterized.Rhodamine B solution was used as simulated dye wastewater,the influencing factor of the amount of ZIF-8,the concentration of rhodamine B,pH and temperature were studied.At the same time,we studied the adsorption thermodynamics and kinetic characteristics.The results showed that the adsorption capacity of rhodamine B could reach more than 85%in 200 mL of 10 mg/L solution when the amount of ZIF-8 was 200 mg.The adsorption process is a spontaneous endothermic physical adsorption process,which accords with the quasi-first-order kinetic model.
作者:
白书立 陈凯 李换英 刘敏超
Bai Shuli;Chen Kai;Li Huanying;Liu Minchao(School of Biotechnology and Health Sciences,Wuyi University,Jiangmen 529099,China)
机构地区:
五邑大学生物科技与大健康学院
出处：
《betway官方app 学报：自然科学版》 CAS 北大核心 2020年第4期73-77,共5页
基金：
国家自然科学基金(21006065) 江门市科技计划项目(2019JC01011).
关键词：
ZIF-8 罗丹明B 吸附热力学 吸附动力学
ZIF-8 rhodamine B adsorption thermodynamics adsorption kinetics
分类号：
X703 [环境科学与工程—环境工程]
