Electrochemical Ferrate(VI) Synthesis with Cast Iron Shavings and Its Potential Application for Household Graywater Recycling
Publication: Journal of Environmental Engineering
Volume 144, Issue 9
Abstract
This paper deals with a laboratory-based investigation for the treatment of graywater generated from public housing in Turkey. In the first part of the study, ferrate(VI) has been synthesized electrochemically. The current efficiency (CE), energy consumption (EC), and ferrate(VI) yield during the electrochemical synthesis of ferrate(VI) was measured using cast iron shavings as anode materials. In terms of the highest CE, the lowest EC, and ferrate(VI) yield, 16-M NaOH media, applied current of 3 A, and 90 min of electrolysis time were found as optimum conditions for electrochemical synthesis of ferrate(VI) with cast iron shavings. This reactor configuration with cast iron shavings provided much higher CE values compared with the other studies. Ferrate(VI) was quite effective for the removal of constituents in graywater. Applying ferrate(VI) dose at pH 7 was successful at removing organic pollutants and total coliforms (TCs). Besides, more than 73% anionic surfactant degradation was achieved at the same conditions. According to reuse regulations, treated graywater by electrosynthesized ferrate(VI) can be used for unrestricted reuse options. Additionally, the greater removal of organics by ferrate(VI) reduced the potential of bacterial regrowth and additional chemical disinfectant demand.
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Published In
Journal of Environmental Engineering
Volume 144 • Issue 9 • September 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: Feb 13, 2018
Accepted: Mar 26, 2018
Published online: Jun 20, 2018
Published in print: Sep 1, 2018
Discussion open until: Nov 20, 2018
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