Dura, Adelaide and Breslin, Carmel B. (2019) Electrocoagulation using stainless steel anodes: Simultaneous removal of phosphates, Orange II and zinc ions. Journal of Hazardous Materials, 374. pp. 152-158. ISSN 0304-3894

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Abstract

Two stainless steel anodes, AISI 420 and AISI 310, and pure iron were compared in an electrocoagulation study for the simultaneous removal of phosphates, Orange II and Zinc ions from a synthetic wastewater at a current density of 11.7 mA cm–2 and a surface area to volume ratio of 19.4 m–1. High removal efficiencies were observed with AISI 420 and pure iron, reaching values between 88% and 99%, while significantly lower values, approximately 30%, were obtained with AISI 310. The AISI 310 performed well in the removal of Zn2+ due to its removal as Zn(OH)2. The variations in the performance of the steel anodes were attributed to the lower chromium content of the AISI 420, which gives less passive behaviour. This was supported using polarisation data, where a 10–fold increase in the corrosion current was obtained for AISI 420 compared to AISI 310. Furthermore, Cr(VI) was observed in the solution phase when AISI 310 was employed as the anode, illustrating the importance of the alloying concentrations. While rust particles were seen during the non–continuous use of the iron anode, they were not observed with the AISI 420 anode.

Item Type:	Article
Additional Information:	Cite as: Adelaide Dura, Carmel B. Breslin, Electrocoagulation using stainless steel anodes: Simultaneous removal of phosphates, Orange II and zinc ions, Journal of Hazardous Materials, Volume 374, 2019, Pages 152-158, ISSN 0304-3894, https://doi.org/10.1016/j.jhazmat.2019.04.032.
Keywords:	Electrocoagulation; Stainless steel; Chromium content; Phosphates; Dyes; Zinc ions;
Academic Unit:	Faculty of Science and Engineering > Chemistry
Item ID:	14128
Identification Number:	https://doi.org/10.1016/j.jhazmat.2019.04.032
Depositing User:	Dr. Carmel Breslin
Date Deposited:	04 Mar 2021 15:13
Journal or Publication Title:	Journal of Hazardous Materials
Publisher:	Elsevier
Refereed:	Yes
URI:	Publisher
Use Licence:	This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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