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.
出处
《分析试验室》
CAS
CSCD
北大核心
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)
