超临界CO_2络合萃取重金属研究进展

Study on the Supercritical CO_2 Chelating Extraction of Heavy Metals

超临界流体萃取作为一种新型分离技术,不能直接萃取重金属等离子型物质,但能萃取离子与配合剂反应生成的配合物。将配合反应与超临界CO2流体萃取结合形成了又一门新型的萃取技术—超临界CO2络合萃取。在总结国内外文献的基础上,介绍了超临界CO2络合萃取重金属的原理、影响因素以及最新进展情况。

Supercritical fluid extraction is a new extraction technique, which can＇t extract the ions substance such as heavy metals directly, but can extract the ions by chelating with chelating agent. Combining the chelating reaction with the supercritical CO, extraction forms a new extraction technique---supercritical CO2 chelating extraction. The principle, affecting factors and new progress of supercritical CO2 chelating extraction are discussed in the paper.