TY - JOUR ID - 130846 TI - Photocatalytic Degradation of Ethylbenzene in Aqueous Solutions by ZnFe2O4 Nanoparticles Supported on the Copper Slag: Optimization, Kinetics and Thermodynamics Studies JO - Physical Chemistry Research JA - PCR LA - en SN - 2322-5521 AU - Malekhossini, Hossein AU - Mahanpoor, Kazem AD - Department of Chemistry, North Tehran Branch, Islamic Azad University, Tehran, Iran AD - bDepartment of Chemistry, Arak Branch, Islamic Azad University, Arak, Iran Y1 - 2021 PY - 2021 VL - 9 IS - 3 SP - 539 EP - 552 KW - Photocatalytic Process KW - Mathematical Modeling KW - Experimental Design KW - UV + H2O2 DO - 10.22036/pcr.2021.276552.1902 N2 - ZnFe2O4/Copper slag (CS) which is an environmentally friendly and cost-effective catalyst was produced by co-precipitation methods and a thermal process. The synthesized catalyst was characterized by XRD, SEM, EDX and BET surface area analysis. The X-rays diffraction pattern confirmed that the crystal structure of ZnFe2O4 after stabilization on CS zeolite has not changed. The SEM images showed that, despite their varying sizes, the particles all have the same shape. Photocatalytic activity of the catalyst was tested for the degradation of ethylbenzene (EB) in water by UV + H2O2 method in the reverse-flow packed bed photo reactor. The process optimization and modeling were performed using the full factorial method. The initial concentration of EB = 30 ppm, pH = 9 and initial H2O2 concentration = 15 ppm were the best conditions. Under ideal process conditions, the removal efficiency of EB was greater than 99.5%. The validity of the Langmuir-Hinshelwood kinetics model was confirmed using EB photocatalytic degradation experimental results. The values of 〖∆H〗^⫲and 〖∆S〗^⫲ for the photocatalytic degradation of EB by ZnFe2O4/CS catalyst in the UV+H2O2 process were calculated based on the transition state theory and gave 1.67 kJ mol-1 and -263.057 J K-1 mol-1 respectively. UR - https://www.physchemres.org/article_130846.html L1 - https://www.physchemres.org/article_130846_a3c9142926c073fb8c01bc436da01e1e.pdf ER -