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This study emphasis the removal of methyl orange (MO) from aqueous medium by  Raphanus caudatus  powdered leaves biomass. Functional groups involved in the removal of MO dye from aqueous medium by leave biomass were identified by Fourier transform infrared (FTIR) spectroscopy analysis. It was seen that removal of dye molecules from aqueous medium was affected by the change in adsorption condition such as adsorbent dose, agitation time and pH of the medium. Maximum adsorption capacity of  Raphanus caudatus  leave biomass powder for MO dye was found as 30.86 mg/g. Regression factor ( R  2 ) value indicates the best fitting of Langmuir isotherm model for the adsorption process. Amount of adsorption energy calculated by Dubinin-Radushkevich (DR) isotherm model illustrates the chemical bond formation between dye and biomass particles. Recyclability results depict that biomass showed good adsorption capacity value for MO up to 4th reusability cycle.

Investigating adsorptive potential of Raphanus caudatus leaves biomass for methyl orange dye: isotherm and kinetic study