TY - JOUR N2 - The report presents the results of selected heavy metals (Zn, Cu, Cd, Ni, Pb) removal from industrial wastewater sludge collected from metallurgy industry. As washing solutions two chelating agents were used: EDTA and citric acid. The study was focused on 0.000 (deionized water), 0.010, 0.050, 0.075, 0.100 M and 0.000, 0.050, 0.100, 0.500, 1.000 M, EDTA and citric acid solutions, respectively. Efficiency of EDTA and citric acid solutions for metal removal was studied by extraction of sludge samples with chelators. Chemical extraction of selected metals was effective for both types of solution. Optimal concentration of EDTA was 0.100M for Zn, Ni and Cd, 0.075 M for Cu and Pb. Optimal concentration of citric acid was 0.500 M for all analyzed metals L1 - http://www.czasopisma.pan.pl/Content/85769/PDF/10265-Volume38-Issue4-paper_02.pdf L2 - http://www.czasopisma.pan.pl/Content/85769 PY - 2012 IS - No 4 DO - 10.2478/v10265-012-0036-2 KW - Metallurgical wastewater sludge KW - ions of metals KW - EDTA KW - citric acid KW - chemical extraction A1 - Karwowska, Beata PB - Polish Academy of Sciences VL - vol. 38 DA - 2012 T1 - Optimalization of Metals Ions Extraction from Industrial Wastewater Sludge with Chelating Agents / Optymalizacja Procesu Ekstrakcji Jonów Metali Z Przemysłowych Osadów Ściekowych Za Pomocą Roztworów Związków Chelatujących UR - http://www.czasopisma.pan.pl/dlibra/publication/edition/85769 T2 - Archives of Environmental Protection ER -