新型杯[4]芳烃衍生物对Pb^(2+),Cd^(2+)的萃取性质

Extraction properties of new calix[4]arene derivatives to Pb^(2+),Cd^(2+)

研究了新型杯[4]芳烃D对Pb2+,Cd2+离子的液-液萃取性质,并将其与自制的杯[4]芳烃A及其衍生物B、C对Pb2+,Cd2+离子的液-液萃取性质进行了比较。结果表明,与化合物A^C相比,D对Pb2+萃取率最高,在实验条件下,可达到42.8%;测试的四种化合物对Cd2+离子的萃取效率均不佳,未经任何修饰的杯[4]芳烃A的萃取效率最高,仅8.5%。推测对Cd2+的萃取为阳离子交换机理。

Liquid-liquid extraction properties of new calix [ 4 ] arene derivatives D to Pb^2＋ ＆ Cd^2＋ were studied ,and the comparison of the properties with the self-made calix[ 4 ] arene A and its derivatives B, C were made. The results showed that compound D has the highest extracting rate up to 42.8% towards Pb^2＋ among A, B and C under the conditions of the experiment;and all rate of extraction of four tested compounds to Cd^2＋ were poor. Unmodified calix [ 4 ] arene A, which extracting rate was the best one, reached only 8.5%. Cation interaction mechanism has been proposed.