Recent Progress in Heavy Metal Extraction by Supercritical CO2 Fluids

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• 作者：Fengying Lin ; Dagang Liu ; Sonakshi Maiti Das ; Nana Prempeh ; Yan Hua ; Jiangang Lu
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2014
• 出版时间：February 5, 2014
• 年：2014
• 卷：53
• 期：5
• 页码：1866-1877
• 全文大小：510K
• ISSN：1520-5045

文摘

SFE-CO₂ is a novel, promising, environmentally benign and inexpensive extracting method developed over the past few years to overcome environmental problems encountered due to the use of conventional solvents. One component (the extractant) is separated from another (the matrix) using SCF-CO₂ as the extracting solvents. This method is widely used for extracting heavy metals from environmental contaminant, bioactive compounds like antioxidants, plant medicine and natural products or remediating heavy metal contaminated soil by using good binding activity of SCF-CO₂ to heavy metal ions. The major advantages of the use of SCF-CO₂ as a solvent are its superior mass transfer properties, easy recycling and lack of secondary waste formation. We try to focus on the recent advances in SCF-CO₂ extraction technology for heavy metal extraction. In this review, the mechanism, procedure, and application of heavy metal extraction by SCF-CO₂ are summarized in a comprehensive manner and the factors affecting the extraction efficiency are analyzed. We try to provide some meaningful information about heavy metal extraction by SCF-CO₂ and make it a preferable option in heavy metal treatments.