Research of Phenols Adsorption from Simulated Coal-gasification Wastewater by Resin

HPD-950 resins were used to adsorb phenol and resorcinol from simulated solution by placing them in 250ml conical-stopper flasks and shaking at 150 rpm for 4h, the thermodynamic parameters and the effect of ammonia and sulfide were investigated. The study showed that the phenol adsorption onto HPD-950 were more suit to Langmuir model but resorcinol adsorption onto HPD-950 were more suit to Freundlich model, the value of parameters such as Gibbs free energy(Delta G), enthalpy(Delta H) and entropy (Delta S) were all negative indicated that the adsorption processes were spontaneously heat release processes and the confusion of system decreased during the processes, the existence of ammonia was propitious to phenol adsorption onto resins while the sulfide was disadvantageous for the phenol adsorption. (C) 2011 Published by Elsevier B. V. Selection and/or peer-review under responsibility of National University of Singapore.