| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 585611 | Journal of Hazardous Materials | 2006 | 8 Pages |
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 O2 l−1 and a TOC of 214 mg C l−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 W m−2), the best operational conditions were the following: [H2O2] = 3703 mg l−1, [Fe2+] = 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 FeCl3·6H2O 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.
