Adsorption Principles of Biphenol-A by Activated Carbon

Adsorption of biphenol-A(BPA) by activated carbon was studied.Adsorption velocity is rapid,and the liquid-solid equilibrium is accomplished within 1 h.The relationship between the quantity of solute adsorbed per unit mass of adsorbent and the solution concentration at the equilibrium state can be described by Freudlich isotherm equilibrium model: q_e=Kc~(1n),while K=191 mg/g,1n=0.239.When pH9 and other organic compounds existing,adsorption capacity reduces and the principle of adsorption changes because of BPA ionization and compertitive adsorption.However,using activated carbon adsorption method,the effluent BPA concentration can be achieved less than(0.08) mg/L.Adsorption by activated carbon is one of the effective methods for BPA containing wastewater treatment.