含硫基团离子液体对含锌废水的萃取及促进机理  

Extraction of Zinc Containing Wastewater by Sulfurous Group Ionic Liquid and Its Promotion Mechanism

作　　者：周梁源 师维江 湛含辉[2] ZHOU Liangyuan;SHI Weijiang;ZHAN Hanhui(Jiangsu Zhongjian Engineering Design&Research Institute Co.Ltd.,Lianyungang Jiangsu 222000,Chian;School of Environment Science and Spatial Informatics China University of Mining and Technology,Xuzhou Jiangsu 221000,Chian)

机构地区：[1]江苏中建工程设计研究院有限公司,江苏连云港222000 [2]中国矿业大学环境与测绘学院,江苏徐州221000

出　　处：《新疆大学学报（自然科学版）（中英文）》2021年第1期49-53,共5页Journal of Xinjiang University(Natural Science Edition in Chinese and English)

基　　金：国家自然科学基金(51574238);大学生创新训练项目(201810290036)

摘　　要：针对含锌离子废水的选择性处理问题,研究制备两种含有硫醚与硫脲基的功能性离子液体,对含锌离子废水进行了萃取分析,探讨重金属离子、溶液pH及超声波辅助等其他因素对萃取过程的影响.结果表明两种基团较之传统咪唑离子液体对锌离子的萃取效果(30%~40%)均有着较大的促进作用,其中硫脲基离子液体的萃取率可达75%,硫醚基离子液体萃取率可达90%以上.pH的改变对Zn^2+的萃取率影响不大,超声波可加快萃取过程,但对最终萃取率影响较小,研究同时发现官能化离子液体中负离子与Zn^2+之间的静电相互作用外,硫醚基对Zn^2+还存在较强的路易斯酸碱作用,能够与Zn^2+形成稳定配合物.Aiming at the selective treatment of zinc ion-containing wastewater,this study prepared two functional ionic liquids containing thioether and thiourea groups,extracted and analyzed the zinc ion-containing wastewater,and discussed the influence of other factors such as heavy metal ions,solution pH and ultrasonic assist etc on the extraction process.The results show that the two groups have a greater promotion effect on the extraction effect of zinc ions(30~40%)than traditional imidazole ionic liquids.Among them,the extraction rate of thiourea-based ionic liquids can reach 75%.The liquid extraction rate can reach more than 90%.The change of pH has little effect on the extraction rate of Zn^2+.Ultrasound can speed up the extraction process,but has little effect on the final extraction rate.At the same time,it is found that the electrostatic interaction between the anion and Zn^2+in the functionalized ionic liquid has a sulfide group.It also has a strong Lewis acid-base effect on Zn2+and can form stable complexes with ZnZn^2+.

关 键 词：含硫基团离子液体 含锌废水 萃取 路易斯酸碱作用 

分 类 号：X703.1[环境科学与工程—环境工程]