Water Res. 2002 Nov;36(19):4757-64.

Chemical precipitation of heavy metals from acid mine drainage.

Source

Department of Chemistry, The University of Kentucky, Lexington 40506-0055, USA.

Abstract

The 1,3-benzenediamidoethanethiol dianion (BDET, known commercially as MetX) has been developed to selectively and irreversibly bind soft heavy metals from aqueous solution. In the present study BDET was found to remove > 90% of several toxic or problematic metals from AMD samples taken from an abandoned mine in Pikeville, Kentucky. The concentrations of metals such as iron, may be reduced at pH 4.5 from 194 ppm to below 0.009 ppm. The formation of stoichiomietric BDET-metal precipitates in this process was confirmed using X-ray powder diffraction (XRD), proton nuclear magnetic resonance (1H NMR), and infrared spectroscopy (IR).

PMID:: 12448518; [PubMed - indexed for MEDLINE]

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