☆ 4.7 Article

Kinetic modeling of powdered activated carbon ozonation of sulfamethoxazole in water

CHEMICAL ENGINEERING JOURNAL (2010)

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Journal

CHEMICAL ENGINEERING JOURNAL
Volume 164, Issue 1, Pages 70-76

Publisher

ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2010.08.025

Keywords

Sulfamethoxazole; Ozonation; Catalytic ozonation; Powdered activated carbon; Kinetic modeling; Water treatment

Categories

Engineering, Environmental Engineering, Chemical

Funding

  1. MICINN of Spain
  2. European Commission [CTQ2006-04745, CTQ2009-13459-C05-05]
  3. Ministry of Education of Spain

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Ozonation of sulfamethoxazole promoted by a powder activated carbon (PAC) of neutral nature has been studied for mechanistic and kinetic purposes. The main advantage of using powder activated carbon was the removal of both liquid-solid and internal diffusion mass transfer resistances. In addition, at the operational conditions applied the influence of the gas-liquid mass transfer was eliminated. As a result, in the absence of any physical mass transfer resistances, a mechanism that involves both homogenous and heterogeneous reactions for the mineralization of the water matrix was proposed and a mathematical kinetic model was obtained from the corresponding mass balances of main species present. In order to properly solve the kinetic model a term indicative of the changing nature of the water matrix was introduced. In that way the promoting or non-promoting character of water constituents was considered in the mechanism. (C) 2010 Elsevier B.V. All rights reserved.

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