| Journal: | Quimica nova |
| Database: | PERIÓDICA |
| System number: | 000313162 |
| ISSN: | 0100-4042 |
| Authors: | Catanho, Marciana1 Malpass, Geoffroy Roger Pointer Motheo, Artur de Jesus |
| Institutions: | 1Universidade de Sao Paulo, Instituto de Quimica de Sao Carlos, Sao Carlos, Sao Paulo. Brasil |
| Year: | 2006 |
| Season: | Sep |
| Volumen: | 29 |
| Number: | 5 |
| Pages: | 983-989 |
| Country: | Brasil |
| Language: | Portugués |
| Document type: | Artículo |
| Approach: | Experimental |
| English abstract | This paper presents the study of the oxidation of three textile dyes (Remazol black B, Remazol Brilliant Orange 3R and Remazol Golden Yellow RNL) using electrochemical and photoelectrochemical methods. In both methods, electrolysis experiments were performed at a current density of 50 mA cm-2 in an aqueous solution of each dye (30 mg L-1), using a photoelectrochemical flow-cell. For all the dyes studied, the photoelectrochemical method was demonstrated to be more efficient than the electrochemical one. Photoelectrochemical oxidation resulted in complete decoloration after 90 min of electrolysis and total organic carbon (TOC) removal reached up to 36%. It was observed that the dyes presenting chromophores at higher wavelengths are removed the quickest, which indicates that photosensitised (photoassisted) oxidation occurs. The level of color was reduced to levels below the standards presented in the literature, which indicates the viability of the photoelectrochemical process as part of the treatment of textile effluents |
| Disciplines: | Química |
| Keyword: | Química industrial, Química ambiental, Colorantes textiles, Colorantes azo, Tratamiento electroquímico, Tratamiento fotoelectroquímico |
| Keyword: | Chemistry, Industrial chemistry, Environmental chemistry, Textile dyes, Azo dyes, Electrochemical treatment, Photoelectrochemical treatment |
| Full text: | Texto completo (Ver HTML) |
