KOH活化增强多壁碳纳米管对水中双氯芬酸吸附去除  

KOH Activated Multi-walled Carbon Nanotubes With Enhanced Adsorption Performance Towards Diclofenac Removal in Water

作　　者：徐伟 殳祉懿 陈锐 XU Wei;SHU Zhi-yi;CHEN Rui(Shanghai Shenhuan Environmental Engineering Co.,Ltd.,Shanghai 200092,China;Shanghai Construction Environmental Technology Co.,Ltd.,Shanghai 200135,China;Shanghai Yangpu District Environmental Monitoring Station,Shanghai 200092,China)

机构地区：[1]上海申环环境工程有限公司,上海200092 [2]海建工环境科技有限公司,上海200135 [3]上海市杨浦区环境监测站,上海200092

出　　处：《环境科技》2024年第2期13-18,23,共7页Environmental Science and Technology

基　　金：上海市“科技创新行动计划”科技小巨人工程项目(220HX014700).

摘　　要：通过研究pH值、吸附时间、温度、离子浓度及腐殖酸(HA)浓度等因素影响KOH活化增强多壁碳纳米管(MWCNTs)制备的K-MWCNTs对双氯芬酸(DCF)的吸附特性。结果表明,K-MWCNTs质量浓度为400 mg/L时,吸附量约提升5倍;pH值为5.0时存在最大吸附量(82.0 mg/g);吸附平衡时间符合准二级动力学模型;吸附等温线符合Langmuir模型;强离子浓度与HA抑制吸附;K-MWCNTs吸附涉及静电作用、π-π键及范德华力等作用,可用于水体中DCF的高效去除。Multi-walled carbon nanotubes(MWCNTs)were activated by KOH to make a new adsorbent K-MWCNTs,and the adsorption characteristics of the adsorbent on diclofenac(DCF)in water were studied under different pH,contact time,temperature,ionic strength and humic acid(HA)concentration.The results showed that K-MWCNTs the adsorption capacity of K-MWCNTs was improved about 5 times with dosage of adsorbent was 400 mg/L,compared with MWCNTs;The adsorption reached the maximum(82.0 mg/g)when pH was 5.0;The adsorption equilibrium was more consistent with the pseudo-second-order kinetics model.Langmuir model could be better described the adsorption isotherm.The adsorption of DCF onto K-MWCNTs was inhibited by high concentration of ion and HA.The adsorption process of K-MWCNTs mainly involves electrostatic interaction,π-πbond and Van der Waals force,which could be used for efficient removal of DCF in groundwater:model.Langmuir model could be better described the adsorption isotherm.The adsorption of DCF onto K-MWCNTs was inhibited by ionic strength and humic acid.The adsorption process mainly involves electrostatic interaction,π-πbond and Van der Waals force.

关 键 词：吸附 多壁碳纳米管 活化 双氯芬酸 

分 类 号：X5[环境科学与工程—环境工程]