removal of betamethasone sodium phosphate from wastewater using zinc oxide nanoparticles

the photocatalytic degradation of betamethasone sodium phosphate was investigated in aqueoussuspensions of zinc oxide nanoparticular with diameter size 20 nm under a variety of conditions.different parameters such as irradiation time, the amount catalyst (0.12-0.8 g lh), initialconcentration of drug (10-50 mgljand initial ph values (ranging from 3 to ii) were investigatedin the presence of various electron acceptors. it was observed that 0.44 gl-i of photocatalyst is theoptimum value for photocatalyst dosage. in the most favorite conditions, the degradationefficiency was obtained 30gl-i for betamethasone sodium phosphate. finally, the kinetics processwas studied and the photodegradation rate of betamethasone sodium phosphate was found to obeypseudo-first-order kinetics equation represented by the langmuir-hinshelwood model.