Dye Removal Potential of Red Pine Cone from Synthetic Wastewater under Optimized Conditions

Synthetic dyes are extensively used in many industrial applications like textile, leather and cosmetics. The release of various harmful dyes from these industries into the environment has attracted great attention worldwide in recent years. Biosorption is a very effective dye removal technique from aqueous system. In this research, the biosorption performance of cone of red pine for C.I. Basic Red 46 as a model azo dye from synthetic wastewater under optimized biosorption conditions was investigated. The equilibrium data were evaluated with Freundlich, Langmuir and DubininRadushkevich isotherm models. The biosorption equilibrium was successfully described through Langmuir isotherm. This displayed the monolayer coverage of dye molecules on the biosorbent surface. The pseudo-first-order, pseudo-second-order, logistic and intra-particle diffusion models were used for the kinetic evaluation. The logistic model presented the best fit to the experimental results. Thus, this forestry waste biomass can be employed as a cheap biosorbent for the dye removal.