"New low cost sorbents for Cr(VI) - batch and column experiments" . . . "Kom\u00E1rek, Michael" . "91610" . . . . "\u0160illerov\u00E1, Hana" . "3"^^ . "New low cost sorbents for Cr(VI) - batch and column experiments"@en . . "2012-09-23+02:00"^^ . "16th International Conference on Heavy Metals in the Environment (ICHMET)" . "000326475400200" . "RIV/60460709:41330/13:62183!RIV14-MSM-41330___" . . . "E D P SCIENCES, 17 AVE DU HOGGAR PARC D ACTIVITES COUTABOEUF BP 112, F-91944 CEDEX A, FRANCE" . "Rome, ITALY" . "New low cost sorbents for Cr(VI) - batch and column experiments" . "E D P SCIENCES, 17 AVE DU HOGGAR PARC D ACTIVITE" . "The use of agricultural byproducts and industrial biowaste materials has been shown to be an attractive technique for removing Cr(VI) from contaminated waste waters. In this study, used brewers draff, peat moss, sawdust, grape stalks and husks were investigated as novel biosorbents for Cr(VI). The material was tested in two different modifications. The material was dried, cut and sieved and part of it was subjected to acid (2 M H2SO4) and alkali (0.5 M NaOH) pre-treatments to remove starch, proteins and sugars. Fourier transform infrared rays analysis on solid phase (FTIR-ATR) was used to determine the main functional groups that might control the metal uptake. Batch experiments were performed at different pH values (3, 4.5, 6) and at various initial concentration of Cr(VI) (25. 250 mg L-1). Two equilibrium empirical models, Langmuir and Freundlich, were used to describe Cr(VI) adsorption. In order to identify possible reduction processes, ion exchange separation on the AG1-X8 resin was used to separ"@en . "New low cost sorbents for Cr(VI) - batch and column experiments"@en . . . "chromium, biosorption process, organic substrates, batch and packed bed column experiments"@en . . "[7EF709D314A5]" . "The use of agricultural byproducts and industrial biowaste materials has been shown to be an attractive technique for removing Cr(VI) from contaminated waste waters. In this study, used brewers draff, peat moss, sawdust, grape stalks and husks were investigated as novel biosorbents for Cr(VI). The material was tested in two different modifications. The material was dried, cut and sieved and part of it was subjected to acid (2 M H2SO4) and alkali (0.5 M NaOH) pre-treatments to remove starch, proteins and sugars. Fourier transform infrared rays analysis on solid phase (FTIR-ATR) was used to determine the main functional groups that might control the metal uptake. Batch experiments were performed at different pH values (3, 4.5, 6) and at various initial concentration of Cr(VI) (25. 250 mg L-1). Two equilibrium empirical models, Langmuir and Freundlich, were used to describe Cr(VI) adsorption. In order to identify possible reduction processes, ion exchange separation on the AG1-X8 resin was used to separ" . "2267-1242" . "41330" . . "RIV/60460709:41330/13:62183" . . . . "2"^^ . . . . "2"^^ . . . "P(TA01021055), S" .