Biosorption of malachite green from aqueous solutions by Pleurotus ostreatus using Taguchi method

Dyes released into the environment have been posing a serious threat to natural ecosystems and aquatic life due topresence of heat, light, chemical and other exposures stable. in this study, the pleurotus ostreatus (a macro-fungus) wasused as a new biosorbent to study the biosorption of hazardous malachite green (mg) from aqueous solutions. theeffective disposal of p. ostreatus is a meaningful work for environmental protection and maximum utilization ofagricultural residues.the operational parameters such as biosorbent dose, ph, and ionic strength were investigated in a series of batchstudies at 25°c. freundlich isotherm model was described well for the biosorption equilibrium data. the biosorptionprocess followed the pseudo-second-order kinetic model. taguchi method was used to simplify the experimentalnumber for determining the significance of factors and the optimum levels of experimental factors for mg biosorption.biosorbent dose and initial mg concentration had significant influences on the percent removal and biosorptioncapacity. the highest percent removal reached 89.58% and the largest biosorption capacity reached 32.33 mg/g. thefourier transform infrared spectroscopy (ftir) showed that the functional groups such as, carboxyl, hydroxyl, amino andphosphonate groups on the biosorbent surface could be the potential adsorption sites for mg biosorption. p. ostreatuscan be considered as an alternative biosorbent for the removal of dyes from aqueous solutions.