Abstract
Hydrous manganese oxide-polyacrylonitrile (HMO–PAN) composite was applied for the removal of Co2+, Sr2+ and Cs+ from radioactive laundry wastewater. Single- and multi-solute competitive sorptions onto HMO–PAN were investigated. The maximum sorption capacity was in the order of Co2+ (0.573) > Cs+ (0.551) > Sr2+ (0.310 mmol g−1). Sorption of the metals occurred via physical adsorption due to weak van der Waals force and ion exchange with Mn2+ in HMO–PAN. Sorption behaviors were not related to the types of the surfactants. Among the tested surfactants, SDBS and SOBS remarkably increased the distribution coefficient of Co2+ and Sr2+, respectively.
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