Removal of phenol from Effluent in Fixed Bed: A Review

Phenol removal from wastewater is very widely studied area of research. The practical approach for phenol removal by adsorption involves study of batch adsorption and more importantly the fixed bed operation. In the present study, various aspects of fixed bed adsorption for phenol have been discussed. The review of research carried out on this topic is presented. The phenol removal in fixed bed has been carried out by using adsorbents, biosorbents, aerobic and anaerobic biological mechanisms. In most of the investigations fixed bed adsorption was found to be satisfactory in terms of removal efficiency and time. The nature of break through curve was justified by using various models. The experimental data was in agreement with model results. In most of the cases, the equilibrium capacity increased with increase in influent concentration, bed height and decreased with increase in flow rate. Keywords— Adsorption, saturation time, isotherms, kinetics, flow rate, concentration , removal efficiency.