摘要
报导了大孔型交联的聚乙烯苄四乙烯五胺树脂对Cr(V1)的吸附、洗脱条件,吸附速率常数及活化能、反应热力学函数、Freundlich常数等,并讨论了吸附机理.该树脂对微量(Cr(V1)的富集、回收或除去均有较好的效果.
The new functional resin, macreporous crosslinking polyvinylbenzyl tetraethylenepentamine resin (TEPAR) has a good sorption ability for Cr(Vl) in PH 2- 3 solution, The sorption capacity of TEPAR for Cr(V1) is as high as 2.56 mmol Cr(V1)/g resin. The sorption rate constant and the constant of Freundlisk sorption of TEPAR for Cr(V1),activation energy as well as thermodynamic data etc. of the sorptien of TEPAR for Cr(V1) have been determined. The coordination ratio of the functional group of the resin to Cr(V1), (NHCH2CH2)4NH2 : Cr(V1) is 1 : 1.5 (molar ratio) The Cr(V1) adsorbed on TEPAR can be eluted quantitatiely by a solution of ace-tone-HC1 thiourea used as an eluent. The resin can be regenerated and reused. The resin can be used in the preconcentration, recovery or treatment of micro-scale amount of Cr(V1) with better result.
基金
国家自然科学基金资助课题
关键词
吸附
铬
TEPAR
Tetraethylenepentamine resin
Sorption
Cr(V1)
