Physical and chemical factors affecting the adsorption of Cr(VI) via humic acids extracted from brown coals.

摘要: Abstract The aim of this study is to demonstrate the potential humic acids (HAs) as a low-cost reactive barrier material for environmental protection applications toxic Cr(VI). Sorption Cr(VI) on HAs obtained from Ilgin, Beysehir and Ermenek lignites in Turkey were investigated their sorption properties compared with activated carbon (AC) Merck. adsorption was carried out using batch method. surface depends strongly pH increased decreasing increase concentration metal. Freundlich isotherm used describe observed phenomena. It that maximum capacity 0.55 mmol Cr(VI)/g 0.64 mmol 0.40 mmol achieved at 3.2. rise temperature caused slight decrease value equilibrium constant ( K c ) capacities Ilgin nearly same AC (0.58 mmol Cr(VI)/g). Therefore, are wastewater treatment applications.