Catalytic ozonation of dimethyl phthalate using Fe3O4/multi-wall carbon nanotubes. Issue 16 (18th August 2017)

• Record Type: Journal Article
• Authors: Bai, Zhiyong; Yang, Qi; Wang, Jianlong
• Is Part Of: Environmental technology. Volume 38:Issue 16(2017)
• Page Start: 2048
• Page End: 2057
• Publication Date: 2017-08-18
• Subjects: Dimethyl phthalate -- catalytic ozonation -- magnetic carbon nanotubes -- degradation -- plasticizer; Environmental engineering -- Periodicals; Environmental protection -- Periodicals; 628.05
• DOI: 10.1080/09593330.2016.1245360
• Languages: English
• ISSNs: 0959-3330

Abstract

ABSTRACT: In this paper, Fe3 O4 /multi-wall carbon nanotubes composites were prepared, characterized and used as a catalyst for enhancing the ozonation of dimethyl phthalate (DMP) in aqueous solution. The experimental results showed that DMP degradation and mineralization increased by 26% and 20%, respectively, in catalytic ozonation compared with single ozonation, and more H2 O2 and organic acids were produced during catalytic ozonation process than single ozonation. The effect of pH, ozone concentration and catalyst dosage on DMP degradation was determined. The addition of tert-butanol and phosphates showed a negative effect on DMP degradation, suggesting that the acidic sites on the catalyst is favorable to ozone decomposition to produce hydroxyl radicals. The possible mechanism for catalytic ozonation of DMP was tentatively proposed. The adsorption of ozone and organics onto the surface of catalyst could improve the DMP degradation.