Studies on Adsorption Efficiency and Kinetics of Dye Removal from Textile Effluent using some Natural Bio-adsorbent

Biosorption has emerged as a new technology compared to classical method like chemical precipitation for removing dye from aqueous solution. The adsorption efficiency was investigated of some natural bio-adsorbents which were Neem leaf (Azadirectaindica) & Mehagoni leaf (Switeniamahagoni) as powder form for the removal of dyes from textile effluents. Adsorption performance has been investigated using batch experiments. It is found that dye adsorption capacity (pollutant removal efficiency) of a steady system depends on adsorbent material, pH of solution, adsorbent dose, and contact time. It has been shown that when the adsorbent dosage increased from 0.5 to 2g the removal of the dye varied from 11 % to 77 % and at pH 2 efficiency was observed in case of Neem leaf for Orange MERL by 65%, Blue BFG by 50%, Red EV8V5 by 90% and in case of Mehagoni leaf for Orange MERL by 53.1%, Blue BFG by 67.7%, Red EV8V5 by 77% respectively. Spectrophotometry was used to measure the concentration of the dyes. The removal efficiency of Neem leaf (Azadirectaindica) was found for Orange MERL by 66.02%, Blue BFG by 50.5%, Red EV8V5(dye) by 57%, and with Mahagoni leaf (Switeniamahagoni) for Orange MERL by 60%, Blue BFG by 67.77%, Red EV8V5(dye) by 77%. Significant removal efficiency was shown for bioadsorbents which were used throughout the work so these adsorbents could be used in industries in the treatment of textile effluent.