Biosorption of Direct Dyes from Aqueous Solution Using Rice Husk

Biosorption of direct dyes through rice husk biosorbent is effective method. In this project four dyes are used. The maximum biosorption was obtained at high initial dyes concentration, low biosorbent dose and low pH values for all dyes. In this research, the influence of electrolytes, heavy metals and surfactants on the removal of direct dyes (50 mg/L) was also examined. Industrial effluents were also removed by rice husk efficiently. Sorption/desorption studies showed that the rice husk biosorbent could be reused successfully and efficiently up to three cycles with four dyes.