Study of pentachlorophenol biosorption by phanerochaete Chrysosporium Biomass: Kinetics and adsorption isotherms modeling

چکیده مقاله

Pentachlorophenol (PCP) is the organic compound that has been widely used in different industries. The Pollution of water by organic pollutants such as PCP is a worldwide environmental problem due to their persistence and toxicity. In this study, nonviable Phanerochaete chrysosporium fungus biomass was applied for PCP biosorption from aqueous solution. In order to adsorb PCP, the modified Phanerochaete Chrysosporium biomass with NaOH was used. The influence of various experimental parameters such as initial PCP concentration, solution pH and contact time on the biosorption efficiency was investigated. Kinetic studies were conducted at pH 5, 250 ml of different concentrations of PCP solution, 0.5 g of biomass and various contact time. The equilibrium time was found to be 2 h for fungus biomass to complete saturation. The correlation of pH and initial concentration in PCP biosorption was quite significant (P <0.01). Kinetic studies represented the adsorption process followed by pseudo second-order kinetic model. The maximum monolayer adsorption capacity of P. chrysosporium fungus for PCP was found to be 12.13 mg/g according to Langmuir isotherm. Maximum adsorption was obtained at pH of 3. According to the obtained results, P. chrysosporium fungus appears to be an efficient biosorbent in PCP removal from aqueous solution in low pH conditions.