کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
47561 46476 2009 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Catalysts to improve the abatement of sulfamethoxazole and the resulting organic carbon in water during ozonation
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Catalysts to improve the abatement of sulfamethoxazole and the resulting organic carbon in water during ozonation
چکیده انگلیسی

Sulfamethoxazole (SMX), one pharmaceutical compound, has been treated in aqueous solutions with catalysts (copper and cobalt type perovskites and cobalt–alumina) and promoters (activated carbons). Hydrogen peroxide and saturated carboxylic acids were identified as intermediates. The effects of adsorption and pH have been investigated. Removal of the starting SMX accomplished with ozone alone is a fast process but catalytic or promoted ozonation is needed to significantly reduce the resulting organic carbon. SMX is, thus, mainly removed through direct ozone reaction while hydroxyl radical oxidation is the mechanism of removal the remaining TOC. The kinetics of the process has also been investigated. Perovskite catalytic ozonation resulted to be a chemical control process and apparent rate constants for homogeneous and heterogeneous ozonation were determined. For activated carbon ozonation, external diffusion of ozone to solid particles controlled the process rate.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Catalysis B: Environmental - Volume 92, Issues 3–4, 9 November 2009, Pages 262–270
نویسندگان
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