Photocatalytic reactor, CVD technology of its preparation and water purification from pharmaceutical drugs and agricultural pesticides
| Autor: | Eberhard Burkel, Martin Hantusch, Isabel Morgado, M.C. Mateus, V G Bessergenev |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
General Chemical Engineering
Performance Mixing (process engineering) Portable water purification 02 engineering and technology Solar 010402 general chemistry 01 natural sciences Industrial and Manufacturing Engineering Methylene-blue chemistry.chemical_compound Degradation Acid Environmental Chemistry Thin film Pollutant Chemistry Thin-films General Chemistry 021001 nanoscience & nanotechnology Decomposition 0104 chemical sciences Disinfection Chemical engineering Environmental chemistry Titanium dioxide Photocatalysis Organic pollutants Water treatment Immobilized Tio2 Tubular reactor 0210 nano-technology |
| Zdroj: | Repositório Científico de Acesso Aberto de Portugal Repositório Científico de Acesso Aberto de Portugal (RCAAP) instacron:RCAAP |
| Popis: | A tubular photocatalytic reactor of the immersion type for water purification from organic pollutants has been developed. Few important principles were used in the construction of the reactor, namely, a symmetrical and uniform light distribution with direct incidence of UV irradiation on the photocatalyst surface, a highly active mixing of contaminated water as a result of an air bubbling flux, that simultaneously supplying oxygen that is necessary for a photocatalytic reaction. The implemented highly active thin film photocatalyst was prepared by the Chemical Vapor Deposition (CVD) technology using titanium(isopropoxide) (TTIP) as a precursor. The factor K = Surface/Volume of this reactor is about 255 m(-1). Together with an effective mixing, it creates excellent contacts between the contaminants and the photocatalyst which is very favorable for water purification. The efficiency of this reactor was proven by the decomposition of some pharmaceutical drugs (Ibuprofen, Acetylsalicylic acid, Sulphanilamide, Paracetamol, Caffeine) and of some pesticides (Dimethoate, Azoxystrobin, Iprodione, Propizamid, Isoproturon, Fenarimol). The relation between the kinetic constants of photocatalysis and of photolysis is K-photcat/K-photolysis = 2 divided by 18. These results demonstrate the feasibility of the developed photoreactor for the degradation of recalcitrant organic pollutants, such as pharmaceuticals and pesticides in water. (C) 2016 Elsevier B.V. All rights reserved. Fundacao para Ciencia e Tecnologia (FCT), Portugal [PEST-OE/QUI/UI4023/2014] Centre of Marine Sciences (CCMAR), Portugal info:eu-repo/semantics/publishedVersion |
| Databáze: | OpenAIRE |
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