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Processes 2018, 6(8), 116;

Flotation in Water and Wastewater Treatment

Hephaestus Advanced Laboratory, Eastern Macedonia and Thrace Institute of Technology, 65404 Kavala, Greece
Division of Chemical Technology & Industrial Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
Authors to whom correspondence should be addressed.
Received: 9 July 2018 / Revised: 26 July 2018 / Accepted: 1 August 2018 / Published: 7 August 2018
(This article belongs to the Special Issue Wastewater Treatment Processes)
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Flotation constitutes a separation process that originated from mineral processing. Nowadays, wider applications have been found and compared to flotation for water and wastewater treatment. Stress in the present review paper was mainly applied to heavy metal ions recovery by flotation and the respective mechanism followed, being either ion, precipitate, or sorptive flotation. In the latter case, the use of adsorbents is included (such as powdered activated carbon, zeolites, and goethite), as well as various biosorbents. The flotation of the following metals was reviewed: copper, zinc, nickel, lead, iron, chromium, arsenic, gold, and others. The bubble generation method could be applied for typical dispersed-air flotation column, electroflotation, or dissolved-air flotation; the latter being the most appropriate established technique in water treatment. The role of particle size (for example, studying flotation of salt-type mineral fines) was also examined. View Full-Text
Keywords: separation; dispersed-air flotation; metals; particles; biomass separation; dispersed-air flotation; metals; particles; biomass

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Kyzas, G.Z.; Matis, K.A. Flotation in Water and Wastewater Treatment. Processes 2018, 6, 116.

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