Optimization of Removal of Ibuprofen Antibiotic from Water in the Presence of ZnO/Fe۲O۳ and ZnO/activated Carbon Nanoparticles Using Response Surface Methodology

In this study, ZnO/Fe۲O۳ and ZnO/activated carbon nanoparticles have been employed as efficient adsorbents for the removal of ibuprofen antibiotic from aqueous solutions. Nano-adsorbents were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) analyses. The results illustrate that the ZnO/Fe۲O۳ and ZnO/activated carbon nanocomposite were successfully synthesized. Optimization of the removal of ibuprofen was scrutinized via response surface methodology (RSM) based on central composite design (CCD). The process parameters, such as pH (۴-۶), contact time (۱۰-۲۰ min), nanoparticles dosage (۰.۰۲-۰.۰۴ wt.%), and nano-adsorbent type (ZnO/Fe۲O۳ and ZnO/activated carbon) were investigated in batch experiments. Within the range of the chosen experimental conditions, the optimized values of pH, contact time, nanoparticles dosage, and nano-adsorbent type were obtained to be ۵.۴۸, ۱۷.۲۲ min, ۰.۰۳ wt.%, and ZnO/Fe۲O۳, respectively. According to the optimum condition, the anticipated Ibuprofen removal was ۸۳.۷۴% and the empirical value was ۸۵.۴۲%. The high values of R۲ ۹۵.۹۶ and R۲ adj ۹۳.۷۸ demonstrate that the fitted model shows a satisfactory accord with the anticipated and empirical Ibuprofen removal. Adsorption kinetics and isotherms are well-fitted with pseudo-second-order and Langmuir models, respectively, meaning that monolayer adsorption of Ibuprofen to the adsorbent's surface is controlled by electrostatic interactions, stacking of π-π, and linkages of hydrogen

کلیدواژه ها:

ZnO/Fe۲O۳ ، ZnO/activated carbon ، Adsorption Isotherms ، ibuprofen ، optimization ، Response Surface Methodology