NaOH改性活性炭的制备及其吸附饮用水中二溴乙腈的性能  

Preparation of NaOH Modified Activated Carbon and Its Adsorption Performance for Dibromoacetonitrile in Drinking Water

作　　者：丁春生[1] 杨明[1] 霍建祺 余家明 姚俊[1] DING Chunsheng;YANG Ming;HUO Jianqi;YU Jiaming;YAO Jun(School of Civil Engineering,Zhejiang University of Technology,Hangzhou 310014,China)

机构地区：[1]浙江工业大学土木工程学院,浙江杭州310014

出　　处：《山西大学学报（自然科学版）》2021年第6期1164-1170,共7页Journal of Shanxi University(Natural Science Edition)

基　　金：浙江省自然科学基金(Y5110339)。

摘　　要：采用氢氧化钠对颗粒活性炭(GAC)进行表面改性。用比表面积分析法(BET)、扫描电镜(SEM)和傅立叶红外光谱(FT-IR)分析改性前后活性炭的表面结构,研究氢氧化钠改性活性炭(NaOH-GAC)对二溴乙腈(DBAN)的吸附效果。结果表明:GAC经过改性后,其表面结构发生了改变,NaOH-GAC对DBAN的吸附效果更好。随着DBAN初始浓度的增加,DBAN去除率开始呈上升趋势,当达到吸附平衡时,吸附作用会逐渐减弱。Freundlich吸附等温线能较好地描述NaOH-GAC对DBAN的吸附行为,吸附反应符合准二级吸附动力学方程。The modification method of granular activated carbon(GAC) by NaOH was applied, and the surface structure of GAC and modified GAC was analyzed by BET,SEM and FT-IR, and the adsorption performance of modified activated carbon(NaOH-GAC)on dibromoacetonitrile(DBAN) was studied. The results showed that the surface structure of the GAC was changed after modification, and the adsorption performance of NaOH-GAC on DBAN was better. As the initial concentration of DBAN increases, the removal rate of DBAN begins to increase. When the adsorption equilibrium is reached, the adsorption will gradually weaken. Freundlich adsorption isotherm can better describe the adsorption behavior of DBAN by NaOH-GAC, and the adsorption of DBAN by NaOH-GAC followed the quasi-second-order adsorption kinetic equation..

关 键 词：消毒副产物 二溴乙腈 活性炭 改性 吸附 

分 类 号：X52[环境科学与工程—环境工程]