Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5117258 | Journal of Environmental Management | 2017 | 9 Pages |
Abstract
Photocatalytic degradation of tetracycline using MWCNT/TiO2nanocomposite was investigated under UVC irradiation. The effective operational parameters included pH, irradiation time, photocatalyst dosage, weight ratio of MWCNT to TiO2 and tetracycline concentration and were studied consecutively. Complete removal of tetracycline concentrations of up to 10Â mg/L was obtained at MWCNT to TiO2 ratio of 1.5 (w/w%), pH 5, photocatalyst dosage of 0.2Â g/L. Pseudo-first order kinetic model was best fitted with the experimental results (R2: 0.91-0.98 for different tetracycline concentrations). Based on TOC analysis, mineralization was 37% in the same reaction conditions for initial tetracycline concentration of 10Â mg/L and reached to 83% after 300Â min. In the case of real pharmaceutical wastewater, the COD concentration of 2267Â mg/L decreased to 342Â mg/L after 240Â min in the same operational conditions.
Keywords
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Renewable Energy, Sustainability and the Environment
Authors
Mehdi Ahmadi, Hojjatallah Ramezani Motlagh, Nematollah Jaafarzadeh, Azar Mostoufi, Reza Saeedi, Gelavizh Barzegar, Sahand Jorfi,