摘要
测定了HDEHP、HEHEHP、TOPO、TBP、SDS和CTMAB的煤油溶液与硫酸盐水溶液所构成的液-液体系的界面张力,考察了水相pH对界面张力的影响,求得这些化合物的界面吸附常数,计算出饱和吸附时界面吸附分子的截面积,提出了用C_(min)计算活性剂分配比的方法,研究了向HDEHP或HEHEHP体系中添加TOPO(或TBP)、SDS、CTMAB时界面张力的变化及其对萃取速率的影响.界面化学反应控制的萃取金属阳离子过程的速率将因添加剂占据界面和(或)形成界面负电层而降低,因添加剂与萃取剂形成界面活性较强的分子缔合物对金属的萃取而提高。
The interfacial properties of surface active agents,HDEHP,HEHEHP,TOPO,TBP.SDS.CTMAB.were investigated at 298 K.The interfacial adsorption parameters,Cmin,A,and Langmuir's adsorption constant K were calculated respectively.The effect of additives on the interfacial tensions were discussed.The causes of the additives for the increase and/or decrease of extraction rate were also explained.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1994年第11期1583-1587,共5页
Chemical Journal of Chinese Universities
基金
国家自然科学基金
关键词
HDEHP
HEHEHP
界面性质
添加剂
interfacial property, Surfactant,Bi(2-ethylhexyl) phosphate,2-Ethylhexylphosphoric acid mono 2-ethylhexyl ester