Techno Press

Advances in Environmental Research   Volume 1, Number 4, December 2012, pages 289-304
Performance assessment of {tris (2.methyl.1.aziridinyl) phosphine oxide} photocatalytic mineralization in a falling film reactor, using response surface methodology
J. Saien, A. Raeisi, A.R. Soleymani and M. Norouzi

Abstract     [Full Text]
    Tris (2-methyl-1-aziridinyl) phosphine oxide (MAPO) is extremely poisonous and persistent in aqueous media. An efficient UV/nanoTiO2 process was employed for its mineralization in a high duty falling film photo-reactor based on an experimental design scheme that considers interactions between the main variables. The influencing variables and their range were determined with preliminary studies. The results show substrate mineralization to some extent under mild conditions of: T = 30 °C, pH = 8.5, [MAPO]0 = 60 mg L-1 and [TiO2] =110 mg L-1. The relative importance of the influencing parameters were initial pH > temperature > [MAPO]0 > [TiO2]; while the interdependence of all the parameters was significant. Accordingly, a reduced quadratic expression was developed. Meanwhile, mineralization kinetic studies, based on chemical oxygen demand, revealed a power law model with order of 2.6 during process time until 150 min.
Key Words
    MAPO; photocatalysis; nanoparticle; falling film reactor; response surface methodology; kinetic
J. Saien, A. Raeisi and M. Norouzi: Department of Applied Chemistry, Bu-Ali Sina University, Hamedan 65174, Iran; A.R. Soleyman: Department of Applied Chemistry, Malayer University, Malayer 65719, Iran

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