Extraction of selected heavy metals using modified clays.
In the present study, attapulgite, kaolinite, and montmorillonite KSF were modified using azeotropic distillation to condense 2-mercaptoethanol with the clay material. The resulting product was used as a coordinating agent to remove selected metal ions, e.g., copper(II), cadmium(II), silver(I), nickel(II), and lead(II) ions from standard aqueous solutions. Batch systems were used, and samples were shaken for two hours, and following filtration, metal content of the filtrate was measured by atomic absorption spectrometry. Without adjusting the pH, better than 90% of the metal ions could be removed.
Krikorian
Nadine
N
Institute for Environmental Studies, Department of Chemistry, University of South Florida, Tampa, Florida, USA.
Martin
Dean F
DF
D001546:Bentonite / Q000737:chemistry*; D007616:Kaolin / Q000737:chemistry*; D017616:Magnesium Compounds / Q000737:chemistry*; D008623:Mercaptoethanol; D019216:Metals, Heavy / Q000737:chemistry / Q000302:isolation & purification*; D017655:Silicon Compounds / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*
D017616:Magnesium Compounds; D019216:Metals, Heavy; D017655:Silicon Compounds; D014874:Water Pollutants, Chemical; D001546:Bentonite; D007616:Kaolin; D008623:Mercaptoethanol; C026325:attapulgite