N,N′-二(十二烷基)乙二胺二乙酸萃取汞的研究  

Extraction separation of mercury with a new reagent of N,N-di(dodecyl)ethylenediamien diacetic acid

作　　者：杜巧云[1] 黄华鸣[1] 王建革[1] 

机构地区：[1]洛阳师范学院化学系,洛阳471022

出　　处：《分析试验室》2004年第7期44-46,共3页Chinese Journal of Analysis Laboratory

基　　金：河南省教育厅资助项目 (2 0 0 115 0 0 0 13)

摘　　要：研究了N ,N′ 二 (十二烷基 )乙二胺二乙酸 (简写为H2 R2 Y)的氯仿溶液对汞 (Ⅱ )的萃取行为。考察了酸度、萃取剂浓度、相比及温度等因素对萃取率的影响 ;用电导法及摩尔比法测得萃合物的摩尔比为 1∶1 ;测定了新试剂H2 R2 Y对Hg2 +与Fe3 + 、Co2 + 、Ni2 + 、Zn2 + 、Cr3 + 、Mn2 + 等金属离子的分离效果 ;并根据分配比与温度的关系求出了萃取反应的ΔH0 、ΔS0 、ΔG0 和lgKex值 ,该萃取反应为放热反应。Extraction behaviour of N,N-didodecyl(ethylenediamiendiacetic acid) (H_2R_2Y) in chloroform for mercury (Ⅱ) was investigated. The acidity of the initiate phase, the concentration of extractant, and the extractant temperature were studied. Complex ratio between H_2R_2Y and Hg^(2+) was 1∶1. The effect of Fe^(3+), Co^(2+), Ni^(2+), Zn^(2+), Cr^(3+), Mn^(2+) on the extraction of Hg(Ⅱ) was also investigated. The value of ΔH^0, ΔS^0, ΔG^0, and lg K_(ex) were estimated. The result demonstrated that the extraction reaction was an exothermic reaction.

关 键 词：N N’-二(十二烷基)乙二胺二乙酸 萃取分离 螯合物 汞 

分 类 号：O652.62[理学—分析化学]