| Journal: | Brazilian journal of chemical engineering |
| Database: | PERIÓDICA |
| System number: | 000308873 |
| ISSN: | 0104-6632 |
| Authors: | Vilar, E.O1 Cavalcanti, E.B Carvalho, H.R Sousa, F.B |
| Institutions: | 1Universidade Federal de Campina Grande, Departamento de Engenharia Quimica, Campina Grande, Paraiba. Brasil |
| Year: | 2003 |
| Season: | Sep |
| Volumen: | 20 |
| Number: | 3 |
| Pages: | 291-303 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Experimental, aplicado |
| English abstract | Even in at very low concentrations, heavy metals in industrial waste constitute environmental and health risks. The U.S. Department of Health and Human Services has recognized as chromium compounds and defined carcinogens the level acceptable in drinking water as being only 0.05 ppm. The objective of this work was the electrochemical reduction of hexavalent chromium Cr (VI) to Cr (III) ions in a dilute synthetic solution of K2Cr2O7 and Na2SO4 (0.05N). A plug-flow reactor with an RVG 4000 graphite felt (Le Carbone Lorraine, France) electrode was used for this work. Its morphological characteristics such as specific variables surface, porosity, average fibre diameter and permeability were determined. The influencing process selectivity such as initial concentration of Cr (VI), solution pH, current intensity and conversion yield are considered. The fractional conversion achieved in the plug-flow reactor in the present work, was about 90% |
| Disciplines: | Ingeniería, Química |
| Keyword: | Ingeniería ambiental, Ingeniería química, Residuos industriales, Fieltro de grafito, Electrodos, Reducción electroquímica, Cromo hexavalente |
| Keyword: | Engineering, Chemistry, Chemical engineering, Environmental engineering, Industrial wastes, Graphite felt, Electrochemical reduction, Hexavalent chromium, Electrodes |
| Full text: | Texto completo (Ver HTML) |
