Investigation of Heavy Metals Leaching from Industrial Wastewater Sludge
K. Świerk1, A. Bielicka1, I. Bojanowska1 , Z. Maćkiewicz2
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1Department of Environmental Engineering, Faculty of Chemistry, University of Gdańsk, Poland 2Department of Polypeptides Chemistry, Faculty of Chemistry, University of Gdańsk, 18/19 J. Sobieskiego St., 80 – 852 Gdańsk, Poland
Pol. J. Environ. Stud. 2007;16(3):447-451
Galvanic sewage sludge from electroplating plant was examined for leaching of heavy metals using various extracting solutions. The investigated parameters that influence heavy metals leaching were: contact time, type and concentration of leaching agents and form of sludge. The results of investigations show that the amounts of heavy metals (copper, nickel, chromium) released from industrial sludge using various leaching agents were from 0.07% to ~99% of their total contents. The form of sludge (air – dry or mineral residue) has a significant influence on quantities of metals leached.
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