Application of supercritical fluids to the reactive extraction and analysis of toxic heavy metals from environmental matrices-system optimisation

被引：17

作者：

Elshani, S ^{[1
]}

Smart, NG

Lin, YH

Wai, CM

机构：

[1] Univ Idaho, Dept Chem, Moscow, ID 83844 USA

[2] BNFL, Preston PR4 0XJ, Lancs, England

[3] Pacific NW Natl Lab, Richland, WA 99352 USA

来源：

SEPARATION SCIENCE AND TECHNOLOGY | 2001年 / 36卷 / 5-6期

关键词：

D O I：

10.1081/SS-100103645

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The extraction Of Cu2+, Pb2+, Cd2+ and Zn2+ utilising supercritical fluid carbon dioxide containing dissolved organophosphorus reagents is shown to be feasible. Using the solubility parameter concept and investigation of a variety of physical parameters favourable extraction conditions of 60 degreesC and 400 atm pressure were determined. Cyanex 302 was found to be the most favourable ligand in terms of stability and ability to complex a range of metal ions. A soil containing substantial amounts of Pb2+ and Cd2+ was studied using SFE and the technique was found to reduce the levels of leachable metal ions to near US EPA regulatory levels.

引用

页码：1197 / 1210

页数：14