the removal of amoxicillin with zno nanoparticles in combination with us-h2o2 advanced oxidation processes from aqueous solutions

Background and purpose: the aim of this study was to evaluate the efficiency of zinc oxidenanoparticles (zno nps) in combination with us-h2o2 advanced oxidation processes (aops) for the removal of antibiotic amoxicillin (amo) from aquatic environment. materials and methods: this experimental study was conducted in a batch reactor system. the effect of the parameters, such as ph (3-8), the dose of nanoparticles (0.01-0.08 g/l), reaction time (10-100 min), the initial concentration of the amo (150-250 mg/l) and h2o2 (0.1 – 5mol/l) on the removal efficiency were studied in ultrasonic reactor. the residual amo concentrations were measured at 190 nm using a uv/vis spectrophotometer. results: the results showed that the us-h2o2 advanced oxidation processes using zno nps can effectively lead to the removal of amo from the wastewater. the optimal conditions for this process were ph 3, 0.1 m of h2o2 and the dose zno nps 0.05 g/l and time of 60 minutes. in the current study, it was found that the removal efficiency dropped with the increasing concentrations of amo. under optimal conditions with 150 mg/l of amo and contact time of 60 min, the efficiency removal was also equal to 92.47%. conclusion: the results of this study showed that aop was a very effective method that can be used for the removal of amo antibiotic from aqueous solutions.