In this research, a Keggin-type heteropolyoxometalate (H3PWO12O40) supported on TiO2/ZnO nanoparticles were used for degradation of phenol under UV light and H2O2 was used as oxidant. Based on the results, heterogenization of H3PWO12O40 on TiO2/ZnO could be improved photocatalytic process and could be considered an appropriate heterogonous photocatalyst in the removing of phenol from aqueous solutions in the presence of hydrogen peroxide. Degradation of phenol in the presence of the H3PWO12O40/ZnO could lead to the disappearance of approximately 95% of phenol under UV irradiation and optimized condition. In the same experiment H3PWO12O40 as homogenous catalyst, removed 70% phenol and heterogenous TiO2/ZnO catalyst removed less than 70% phenol from water solution in the same condition. تفاصيل المقالة

Activated carbon from pine cone (PCAC) was used as a precursor to prepare Fe3O4/magnetic activated carbon (MPCAC). Here, the removal of linear alkylbenzene sulfonate (LAS) was studied using catalytic ozonation process (COP) in exposure to MPCAC. Subsequently, it was compared with PCAC. Moreover, the effects of solution's initial pH, catalyst dosage, and the time of ozonation on the removal process were comparatively studied in reference to a sole ozonation process (SOP). According to the results of this study, compared with PCAC, degradability could be improved and initial concentration of LAS reduced by COP using MPCAC. Consequently, almost complete removal (>98%) of 25 mg/L of LAS was achieved under the optimum conditions (15 min ozonation time, 7 mg/min ozone flow, 0.3 g/L catalyst dosage and pH=10). Concluding, this nanocomposite is an effective active catalyst for mineralization and degradation of LAS in COP. تفاصيل المقالة

A Keggin-type heteropolyoxometalate (H3PW12O40) supported on TiO2/ZnO nanoparticles was used for the degradation of phenol under UV light and H2O2 as oxidant. Based on the results, heterogenization of H3PW12O40 on TiO2/ZnO could improve the photocatalytic process and could be considered an appropriate heterogonous photocatalyst in the removal of phenol from aqueous solutions in the presence of hydrogen peroxide. Degradation of phenol in the presence of the H3PW12O40/TiO2/ZnO could lead to the disappearance of approximately 95% of phenol under UV irradiation and optimized condition. In the same experiment H3PW12O40 as a homogenous catalyst, removed 70% phenol and the heterogeneous TiO2/ZnO catalyst removed less than 70% phenol from the water solution in the same conditions. تفاصيل المقالة