Investigation of sorption isotherm and removal kinetics of arsenik onto saw dust

In this research the adsorption of arsenic as a pollutant from textile industry onto carbonized sawdust has been investigated. The effect of various operational parameters such as adsorbent dosage ‚ contact time ‚ agitation rate ‚ pH ‚ initial concentration of dye and temperature on removal percentage of dye were studied in a batch system. Thermo dynamics parameters were calculated to know the adsorption nature. Values of ΔG˚ postulate an spontaneous process and calculated Values of ΔH˚ indicate and exothermic process and Values of ΔS˚ show the enhanced disorderliness on the adsorbent surface in comparison to dye solution. Also adsorption isotherms and Kinetics studies revealed that the adsorption of arsenic onto carbonized sawdust obeys Langmuir isotherm and pseudo-second-order kinetics..