Pseudo second order kinetic model for the biosorption of Cr6+ ion from aqueous solution to periphyton biomass

Research Center for Limnology, Indonesian Institute of Sciences, Cibinong are developing a model of water pollution control through a periphyton substrate engineering. These models form a canal that had a winding stream of 2.0 dm width, 1.1 dm depth, and total length of 60 dm. The periphyton canal will be prepared as a complementary component in a wastewater treatment system, whether originating from industry and from households. To determine the ability of the algae-periphytic absorption was carried out an experiment using heavy metals chromium and iron. After the population is growing well characterized by algal filamentaous young and bright green, then drained of water canals and conducted sampling periphytic biomass as t0. Furthermore, the input media has added chromium (VI) with a concentration of 0.64 mgL directly in growth media periphytic and defined as t0. Periphytic biomass and water samples were taken every 0, 2, 4, 8, 12, 24, and 48 hours. Analysis of metal concentration on periphytic biomass and in water samples were performed for the parameters total Cr. A batch sorption model, based on the assumption of the pseudo-second order mechanism, was applied to predict the rate constants which were found to be 0.2813 g.mg -1 from the model equation t/q = 0.550t + 3.554; R -1 -1 hour 2 = 0.947.