Application of alkaline solid residue of electric arc furnace dust for neutralization/purification of electroplating wastewaters
| Autor: | Višnja Oreščanin, Loris Elez, Damir Ruk, Tahir Sofilić, Nenad Mikulic |
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| Jazyk: | angličtina |
| Rok vydání: | 2008 |
| Předmět: |
Environmental Engineering
Municipal solid waste Waste management chemistry.chemical_element General Medicine Zinc Incineration Electroplating Waste Disposal Fluid Neutralization Refuse Disposal Water Purification electric arc furnace dust alkaline extraction alkaline solid residue electroplating wastewater treatment mud regeneration Residue (chemistry) Wastewater chemistry Waste Management Water Pollutants Leachate Nuclear chemistry Electric arc furnace |
| DOI: | 10.1080/10934520802232121 |
| Popis: | The purpose of this work was development of an appropriate procedure for the neutralization/purification of electroplating wastewater (EWW) with alkaline solid residue (ASR) by-product of the alkaline extraction of zinc and lead from electric arc furnace dust (EAFD). Removal efficiency of ASR at optimum purification conditions (pH 8 and mixing time; 20 minutes) for the elements Pb, Cr (VI), Cr (III), Fe, Ni, Cu and Zn were 94.92%, 97.58%, 99.59%, 99.48%, 97.25% and 99.97%, respectively. The concentrations of all elements in the purified wastewater were significantly lower in relation to the upper permissible limit for wastewaters suitable for discharge into the environment. The remaining waste mud was regenerated in the strong alkaline medium and successfully applied once again for the neutralization/purification of EWW. Removal efficiencies of heavy metals accomplished with regenerated waste mud were comparable to these achieved by original ASR. Elemental concentrations in the leachates of the waste mud were in accordance with regulated values. |
| Databáze: | OpenAIRE |
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