Efficient extraction of phenol from wastewater by ionic micro-emulsion method:Anionic and cationic  

作　　者：Chaobo Zhang Xiaoyong Yang Jian Dai Wenxia Liu Hang Yang Zhishan Bai 

机构地区：[1]State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process,School of Mechanical and Power Engineering,East China University of Science and Technology,Shanghai 200237,China

出　　处：《Chinese Journal of Chemical Engineering》2023年第6期137-145,共9页中国化学工程学报（英文版）

基　　金：sponsored by the National Natural Science Foundation of China(22225804);Shanghai Sailing Program,China(21YF1409500);the National Natural Science Foundation of China(22078102);the Education and Scientific Research Projects of Shanghai,China(19DZ1208201)。

摘　　要：Phenolic wastewater is one of the priorities in the field of wastewater treatment,which poses a serious threat to the human health and nature environment.In this paper,cationic cetyltrimethylammonium bromide(CTAB)and anionic sodium oleate(Na OL)microemulsions were utilized to extract phenol from the wastewater.The optimal extraction factors were investigated by exploring the effects of microemulsion composition ratio and extraction conditions on the phenol extraction performance.Furthermore,the enhanced extraction mechanism of phenol by cations microemulsions is illustrated by studying the extraction process of cationic and anionic microemulsions in the extraction of phenol.The optimum components were obtained:surfactant concentration of 0.2 mol·L^(-1),isoamyl alcohol volume of 30%,internal aqueous phase concentration of CTAB microemulsion of 0.05 mol·L^(-1),and internal aqueous phase concentration of Na OL microemulsion of 0.09 mol·L^(-1).The extraction efficiencies were 96.44%and 82.0%when using CTAB and Na OL microemulsions under optimal conditions(water-emulsion ratio of 5,contact time of 9 min,extraction temperature of 298.15 K,and p H of 9),confirming the enhanced extraction of phenol by CTAB cationic microemulsion.It was analyzed that the enhanced extraction of CTAB microemulsion was due to the electrostatic adsorption of cations with phenol root ions.

关 键 词：Phenol-containing wastewater Phenol recovery Microemulsion extraction Ionic microemulsion Mechanism analysis 

分 类 号：TQ243.12[化学工程—有机化工] X703[环境科学与工程—环境工程] TQ028.32