Assessment of factors influencing the elution of chromium from ferrochromium slag using factorial design of experiment
| Autor: | T. Jena, Chittaranjan Panda, K. C. Panda, Sudhansu Sekhar Biswal, Sudarsan Sahoo |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
inorganic chemicals
010302 applied physics Pollution Municipal solid waste Elution media_common.quotation_subject Metallurgy technology industry and agriculture Slag chemistry.chemical_element 02 engineering and technology Factorial experiment 021001 nanoscience & nanotechnology 01 natural sciences Matrix (chemical analysis) Chromium chemistry.chemical_compound chemistry visual_art 0103 physical sciences otorhinolaryngologic diseases visual_art.visual_art_medium Hexavalent chromium 0210 nano-technology media_common |
| Zdroj: | Materials Today: Proceedings. 35:97-101 |
| ISSN: | 2214-7853 |
| Popis: | The solid waste material ferrochromium slag from the metallurgical industries encounters with disposal problem because of the presence of chromium. From the chemical composition study, the waste slag was observed to contain sizeable amount of environmentally harmful residual chromium. Chromium speciation in the slag was observed to exist as mostly immobile trivalent state. But there may be possibility of its conversion to leachable hexavalent chromium and its subsequent release from slag matrix causing chromium pollution problems. Elution of chromium from slag was studied under adverse environmental situations. The importance of factors influencing chromium elution from the slag samples were assessed using full factorial design analysis and accordingly regression equations were developed for elution of both hexavalent and total chromium. The significant physico-chemical factors affecting elution of chromium from slag matrix are obtained to be pH, size of particle, time of contact and their combinations. |
| Databáze: | OpenAIRE |
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