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Supercritical fluid extraction of heavymetals fromsolidmatrices

Shweta Umale, P.A.Mahanwar

The subject matter of this review is extraction of heavy metals from solid matrices in the presence of supercritical fluids. Since solvent extraction of heavy metals is utilized on a commercial scale, the replacement of organic solvents by Supercritical fluid (SCF) has been the major driving force behind these research efforts. This review is prepared to highlight the areas important for commercial scale application of technology. This reviewspecially focuses on extraction of heavymetals by using supercritical fluid and application field ofSFE. In part 1 of this review, an introduction to supercritical fluid extraction technology is given.Abrief introduction to instrumentation of supercritical fluid extraction is also presented in same part. The advantages of supercritical fluid over conventional solvent extraction have been also discussed in part 1. The second part of this review represents properties of supercritical fluids and important studies on SFE of heavy metals from solid matrices. Applications of SFE technology in various field and Raman shift study of CO2 have been discussed in last section.