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Ion flotation for removal of Ni(II) and Zn(II) ions from wastewaters
Department of Mining and Metallurgical Engineering, Amirkabir University of Technology, Tehran.
Department of Mining and Metallurgical Engineering, Amirkabir University of Technology, Tehran.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Minerals and Metallurgical Engineering.
2015 (English)In: International Journal of Mineral Processing, ISSN 0301-7516, E-ISSN 1879-3525, Vol. 143, p. 131-137Article in journal (Refereed) Published
Abstract [en]

Ion flotation was applied to Ni(II) and Zn(II) cation removal from low concentration synthetic wastewaters. Ethylhexadecyldimethylammonium bromide (EHDABr) and sodium dodecyl sulfate (SDS) were used as collectors and Dowfroth250 and methyl isobutyl carbonyl (MIBC) as frothers. The effective parameters were investigated by the experimental design performed by DX7 software. In this regard, a two-level factorial method was used, and sixteen experiments including 6-level variables were designed. In the first step, the tests were conducted in a Hallimond tube. It was concluded from test results that the optimum conditions for the removal of Ni(II) and Zn(II) ions by initial concentrations of 10. ppm were: pH = 3, SDS = 300. ppm, Dowfroth250 = 90. ppm and air flow rate = 1.8. ml/min. In the second step, optimal results from the first step were evaluated in a mechanical flotation cell. In optimal conditions, the recovery of Ni(II) and Zn(II) ions were 88% and 92%, respectively at 60. min. This study showed that the use of ion flotation is a very effective method for Ni(II) and Zn(II) ion removal from industrial wastewaters. The flotation time in achieving an optimum recovery of Zn(II) ions is shorter than that for Ni(II) ions

Place, publisher, year, edition, pages
2015. Vol. 143, p. 131-137
National Category
Metallurgy and Metallic Materials
Research subject
Mineral Processing
Identifiers
URN: urn:nbn:se:ltu:diva-8062DOI: 10.1016/j.minpro.2015.07.006ISI: 000363818100019Scopus ID: 2-s2.0-84944351821Local ID: 68178287-d7a0-4908-bead-384127f5317eOAI: oai:DiVA.org:ltu-8062DiVA, id: diva2:980952
Note
Validerad; 2015; Nivå 2; 20150914 (andbra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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