【摘 要】
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Extraction of heavy metal ions from solid matrix by means of an incorporation of chelating agents with supercritical carbon dioxide(scCO2) was investigated expe
【机 构】
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Department of Neruosurgery, the First Hospital of Jilin University,Changchun 130021, P. R. China;Sta
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Extraction of heavy metal ions from solid matrix by means of an incorporation of chelating agents with supercritical carbon dioxide(scCO2) was investigated experimentally.Four commercially available chelating agents,diethylammonium diethyldithiocarbamate(Et2NH2DDC),trifluoroacetylacetone(TFA),hexafluoroacetylacetone(HFA)and thenoyltrifluoroacetone(TTA) were tested.The extraction experiments were conducted at 50 ℃ and 1.39× 107-2.80x 107 Pa.According to the experimental results,for the extraction of Cu2+,all the chelating agents investigated here are effective.For other metal ions,such as Pb2+,Ni2+ and Cd2+,Et2NH2DDC exhibited a better extraction result,while other chelating agents were less effective.This investigation is expected to provide a tentative evaluation on the scCO2-based metal extraction from solid media.
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