Title: Removal of heavy metals from samples of residual sludge

Authors: Jose Abrego

Addresses: Department of Environmental Studies, National Institute of Nuclear Research, KM. 36.5 Carretera Mexico-Toluca Salazar, Edo. de Mexico C.P. 52000 or Apartado Postal 18-1027 C.P. 11801 Mexico

Abstract: Nitric acid leaching processes were evaluated for removal of heavy metals from samples of residual sludge from an industrial and municipal wastewater plant. The study showed that an acid:water ratio of 1:1 and a nitric acid concentration of 2 mol 1−1 gave efficient removal of 86.7%, 100% and 100% of copper, nickel and arsenic.

Keywords: heavy metals; nitric acid leaching; solubilisation; residual sludges; wastewater treatment; copper; nickel; arsenic; water pollution; environmental pollution.

DOI: 10.1504/IJEP.1996.028278

International Journal of Environment and Pollution, 1996 Vol.6 No.2/3, pp.295 - 299

Published online: 16 Sep 2009 *

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