Removal of hexavalent chromium anions from solutions by pyrite fines
Bench scale experiments were conducted in the laboratory, aiming to the removal of hexavalent chromium fi:om aqueous solutions, by dispersed pyrite fine particles. Pyrite (iron sulphide mineral), was found to act as an efficient Cr(VI) reducing agent. The resulted hydroxo-Cr(III) species were found to be precipitated (and removed) onto the pyrite particles. The process mechanism was also examined by z-potential measurements and speciation studies. Promising results were obtained at highly acidic pH values (around 1-2), showing an interesting aspect of fine (solid waste) mineral particles utilization, in the removal of a priority pollutant.
Αριστοτέλειο Πανεπιστήμιο Θεσσαλονίκης, Σχολή Θετικών Επιστημών, Τμήμα Χημείας
Water Research, vol.29 no.7  p.1755-1760 [Published Version]
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