期刊
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
卷 26, 期 5, 页码 4192-4201出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s11356-018-2348-9
关键词
Mesoporous materials; SBA-15; KIT-6; Heterogeneous photo-Fenton process; Degradation; Pollutants
资金
- Universidad Tecnologica Nacional (UTN-FRC) [MAUTICO0004427TC]
- Consejo Nacional de Investigaciones Cientificas (CONICET) [PIP 112-2013-0100412]
- Agencia Nacional de Promocion Cientifica y Tecnologica (ANPCyT) [PICT-2015-1485, PICT 2015-2651]
SBA-15 and KIT-6 materials have been synthesized and modified with iron salts by the wet impregnation method with different metal loadings. The different mesostructures obtained were characterized by N-2 adsorption-desorption at 77 K, X-ray diffraction, temperature-programmed reduction, and ultraviolet-visible spectroscopy. These iron-containing mesostructured materials have been successfully tested for the heterogeneous photo-Fenton degradation of aqueous solutions of dangerous herbicides, such as atrazine, using UV-visible light irradiation, at room temperature and close to neutral pH. The results showed that the Fe/SBA-15 (10%) and Fe/KIT-6 (5%) catalysts exhibited the highest activities. However, the Fe/KIT-6 (5%) catalyst with minor Fe loading than Fe/SBA-15 (10%) presented a higher degradation of atrazine (above 98% in a reaction time of 240 min). Therefore, the interconnectivity of the cage-like mesopores had an important influence on the catalytic activity, favoring probably mass-transfer effects. Thus, the high performance of these materials indicates that the heterogeneous via of photo-Fenton process can also be efficiently employed to treat wastewaters containing pollutants such as herbicides, in order to reduce them to simplest and less toxic molecules.
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