摘要
为了解咪唑型离子液体——1-十六烷基-3-甲基咪唑双三氟甲磺酰亚胺([C_(16)mim][NTf2])-正戊醇体系对Au(Ⅲ)的萃取效果,研究了不同pH值、不同萃取剂浓度([C_(16)mim][NTf2]与正戊醇的质量体积比,g/L)、不同相比(离子液体相与浸金液相体积比VIL/Vaq,下同)对Au(Ⅲ)的萃取效果,并研究了[C_(16)mim][NTf2]对Au(Ⅲ)的选择性萃取效果。结果表明:[C_(16)mim][NTf2]对Au(Ⅲ)的萃取率随着pH值和相比的增大呈上升趋势;pH<1.6时,Au(Ⅲ)的萃取率随萃取剂浓度的增加而增大;[C_(16)mim][NTf2]对Au(Ⅲ)有明显的选择性萃取效果,在浸金液Au3+浓度为0.05 g/L,相比为1∶3,浸金液pH=1.6～2.0,[C_(16)mim][NTf2]浓度为5 g/L,常温萃取时间为2 min情况下,Au(Ⅲ)萃取率可达90%以上,Au对于Al、Cu、Fe、Zn的选择性系数β分别为466、780、1 118和1 404。
The extraction of Au(Ⅲ)from aqueous solution with imidazolium-type ionic liquid,1-hexadecyl-3-methylimidazolium bistrifluoromethanesulfonimide([C16mim][NTf2])-n-pentanol was investigated. The effects of pH,extractant concentration(g/L),volume ratio between ionic liquid phase and aqueous solution(mass-volume ratio of[C16mim][NTf2]to n-pentanol on the extraction of Au(Ⅲ)were analyzed. The results indicated that the extraction rate of Au(Ⅲ)increases with the increase of the volume ratio between ionic liquid phase and aqueous solution and pH of aqueous solution,the extraction rate of Au(Ⅲ)increases with the increase of extractant concentration when pH<1.6.[C16mim][NTf2]has obvious selective extraction effect on Au(Ⅲ). The extraction rate of Au(Ⅲ)can reach more than 90% under the condition of the concentration of Au(Ⅲ)in aqueous solution is 0.05 g/L,volume ratio between ionic liquid phase and aqueous solution of 1∶3,leaching gold solution of pH=1.6~2.0,[C16mim][NTf2]concentration of 5 g/L,extraction time of 2 min at room temperature,and the selectivity coefficient β of Au for Al,Cu,Fe,Zn is 466,780,1 118 and 1 404 respectively.
作者
陈玥
张承龙
邓明强
马恩
王瑞雪
王景伟
Chen Yue;Zhang Chenglong;Deng Mingqiang;Ma En;Wang Ruixue;Wang Jingwei(Shanghai Collaborative Innovation Centre for WEEK Recycling,Shanghai,201209,China;WEEK Research Centre of Shanghai Polytechnic Inirersity,Shanghai,201209,China;Shanghai Senlan Environment Resources Co.,Ltd. Shanghai 201203,China)
出处
《金属矿山》
CAS
北大核心
2019年第3期116-118,共3页
Metal Mine
基金
国家自然基金项目(编号:51474146)
上海市联盟计划项目(编号:LM201742)
上海第二工业大学校重点学科项目(编号:XXKZD1602)
上海第二工业大学研究生项目基金资助(编号:A01GY17F022)
