Characterization and photo-Fenton treatment of used tires leachate
| Autor: | P. Ormad, Tomás Llabrés, Judith Sarasa, José L. Ovelleiro, Rosa Mosteo |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Flocculation
Environmental Engineering Chemical Phenomena Light Photochemistry Iron Health Toxicology and Mutagenesis Industrial Waste Ferric Compounds chemistry.chemical_compound Environmental Chemistry Organic chemistry Organic matter Ferrous Compounds Leachate Hydrogen peroxide Waste Management and Disposal chemistry.chemical_classification Chemistry Physical Chemical oxygen demand Electric Conductivity Hydrogen Peroxide Hydrogen-Ion Concentration Pollution Oxygen Light intensity Hydrocarbon chemistry Indicators and Reagents Hydroxyl radical Rubber Nuclear chemistry |
| Zdroj: | Journal of Hazardous Materials. 136:874-881 |
| ISSN: | 0304-3894 |
| Popis: | In this study the leachates derived from used tires were firstly characterized by means of the evaluation of their organic matter content. The leachate from tire powder presented a COD value of 508 mg O(2) l(-1) and a TOC of 214 mg Cl (-1). The main identified organic substances were constituents of the rubber structure: benzothiazole derivatives, phthalates, phenolic derivatives, hydrocarbons and fatty acids. The application of photo-Fenton treatment was investigated in order to obtain the maximum organic matter removal. When a solar chamber as light source was used (light intensity=500 Wm(-2)), the best operational conditions were the following: [H(2)O(2)]=3703 mg l(-1), [Fe(2+)]=92.1 mg l(-1), initial pH 2.7-3.0, reaction time=100 min. After the photo-Fenton treatment at optimum conditions, the reached COD and TOC reduction was 64% and 48%, respectively. The main initial organic substances were eliminated after the reaction and no significant by-products were identified. A complementary treatment consisted of coagulation-flocculation carried out with FeCl(3) x 6H(2)O at pH 12 produced a maximum organic matter removal of 43% as COD and 39% as TOC. A combination of photo-Fenton followed by coagulation-flocculation enhanced the organic matter removal: a reduction of 77% of COD and 64% of TOC was attained. |
| Databáze: | OpenAIRE |
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