Photocatalytic Degradation of Styrene in Aqueous Solution: Central Composite Design Optimization
作者： Narjes Keramati , Bahram Nasernejad , Narges Fallah
DOI: 10.1080/01932691.2013.868316
关键词: Degradation (geology) 、 Styrene 、 Photocatalysis 、 Aqueous two-phase system 、 Aqueous solution 、 Chemical engineering 、 Kinetics 、 Central composite design 、 Chromatography 、 Response surface methodology 、 Chemistry 、 Physical and Theoretical Chemistry 、 Surfaces, Coatings and Films 、 Polymers and Plastics
摘要: In this study, the response surface methodology was first applied to optimize photocatalytic degradation of styrene in aqueous phase under UV/TiO2 system. Twenty experiments were done by adjusting three parameters (styrene concentration, TiO2 dose, and pH) at five levels. Optimal experimental conditions for arbitrary concentration (115 mg L−1) found: initial pH 7 loading 2 g L−1 with efficiency 79.2%. Furthermore, main intermediate produced identified GC/MS. The total organic carbon results revealed that photocatalysis process could be effectively mineralized. Kinetics reaction followed a pseudo-first-order model.
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