Integration of ion exchange and electrodeionization as a new approach for the continuous treatment of hexavalent chromium wastewater
Document title: Integration of ion exchange and electrodeionization as a new approach for the continuous treatment of hexavalent chromium wastewater
Journal: Geomimet
Database: PERIÓDICA
System number: 000414856
ISSN: 0185-1314
Authors: 1
2
1
Institutions: 1Lakehead University, Department of Chemistry, Vancouver, Columbia Británica. Canadá
2Universidad Autónoma de San Luis Potosí, Instituto de Metalurgia, San Luis Potosí. México
Year:
Season: May-Jun
Volumen: 41
Number: 315
Pages: 15-24
Country: México
Language: Inglés
Document type: Artículo
Approach: Aplicado, descriptivo
English abstract Mining and electroplating wastewaters contain many harmful ions, which are discharged into waterways and water bodies and cause significant environmental damage. Hexavalent chromium (Cr(VI)) is an ion that is commonly present in these effluents, which has been proven as toxic to humans. In the present work, continuous ion exchange and electrodeionization are proposed as a new hybrid technology for the effective treatment of Cr(VI) wastewater as well as the recovery of chromium ions. We have systemically studied a strong basic macroreticular anion exchange resin (Amberlite® IRA900) for the removal of Cr(VI). The ion exchange isotherm and kinetics of the resin were determined, showing that the IRA900 anionic ion exchange resin has a high capacity for ion exchange with hexavalent chromium (116 mg Cr(VI) per gram of resin). When the anionic resin was combined with a strong acidic macroreticular cation exchange resin (Amberlite® 200C) and employed in continuous electrodeionization, over 98.5% of Cr(VI) was continuously removed from the dilute compartment with an energy consumption of less than 0.07 kWh/m3, while Cr(VI) was recovered in the concentrate compartment
Disciplines: Ingeniería
Keyword: Ingeniería ambiental,
Ingeniería metalúrgica,
Aguas residuales,
Remoción de minerales,
Cromo hexavalente,
Intercambio iónico,
Electrodeionización
Keyword: Engineering,
Environmental engineering,
Metallurgical engineering,
Waste water,
Mineral removal,
Hexavalent chromium,
Ion exchange,
Electrodeionization
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