Removal of barium from radioactive aqueous solution by PVA–alginate encapsulated titanium oxide using sunlight and other light types

Abstract

Barium(II) removal with titania PVA–alginate beads was conducted with sunlight, xenon, black light bulb (BLB) and light emitting diode (LED) lamps. The removal was studied as a function of pH, contact time, temperature and initial concentration. The findings show the removal rate of barium(II) achieved a 98% maximum within 130 min under sunlight. The beads were found to be easily isolated from the aqueous solution and could be reused a minimum of 5 times without losing the original properties. Barium(II) reduction fitted best with the pseudo second-order rate model with a coefficient of determination (R²) of 0.9938.