Microwave induced degradation of parathion in the presence of supported anatase- and rutile-TiO2/AC and comparison of their catalytic activity

作者：Zhang Zhaohong^*; Jiatieli Jianaerguli; Liu Danni; Yu Fengyang; Xue Shuang; Gao Wei; Li Yuanyuan; Dionysiou Dionysios D

来源：Chemical Engineering Journal, 2013, 231: 84-93.

DOI：10.1016/j.cej.2013.07.001

• Activated carbon
• Activity
• Microwave degradation
• Parathion
• Supported anatase TiO2
• Supported rutile TiO2

In this study, nano-sized anatase or rutile TiO2-supported activated carbon (A-TiO2/AC or R-TiO2/AC) was developed for the microwave (MW)-induced degradation of parathion as a model contaminant in aqueous solution. The effects of selected process parameters such as anatase or rutile TiO2 content, heat-treatment temperature and time, MW irradiation time, initial parathion concentration, catalyst dose, solution pH and MW power on the degradation were studied in details. The results showed that the anatase- and rutile-TiO2 supported on AC both significantly improved the MW/AC degradation effect and the supported A-TiO2/AC showed higher MW catalytic activity than R-TiO2/AC. Also, the supported A-TiO2 on AC can be excited leading to the production of more hydroxyl radicals (OH) than the supported R-TiO2 on AC in aqueous solution under MW irradiation. Comparatively, the supported A-TiO2/AC/MW process displayed many advantages such as high degradation rate, short irradiation time, no residual intermediates, and no secondary pollution. Therefore, the supported A-TiO2/AC/MW showed to be a promising technology for the removal of parathion in wastewater treatment applications.

• 出版日期2013-9
• 单位辽宁大学