Batch and Continuous Removal of Pb (Ⅱ) By Sonochemically Treated Phanerocate Chrysosporium From Aqueous Solutions: Kinetics and Thermodynamics

Abstract

Biological adsorption of heavy metals is an effective process for removing heavy metals from aqueous solutions. In this study, the adsorption properties of non-viable Phanerochaete Chrysosporium biomass are studied for biological adsorption of lead ion in both continuous and batch systems. In the batch process, Langmuir, Freundlich and Dobbinin-Radushkevich isotherms are studied. The adsorption kinetics including pseudo-first order, pseudo-second order and intraparticle diffusion models are also investigated. The experimental equilibrium data follow Langmuir, Freundlich and Dobbinin-Radushkevich models. The kinetic data fit well to the pseudo-second order and intraparticle diffusion models. In the continuous system, by studying the Thomas and Yoon-Nelson models it can be concluded that particles of Phanerochaete Chrysosporium are very suitable adsorbents for the adsorption of heavy metal of lead with high efficiency. Increasing input flowrate causes earlier breakthrough point. Thermodynamic calculations also prove that the process is spontaneous and self-healing and positive ∆H indicate process is endothermic.