Application of boron-doped diamond electrodes for the anodic oxidation of pesticide micropollutants in a water treatment process: a critical review
File(s)Revised Manuscript - McBeath Wilkinson Graham.docx (398.64 KB)
Accepted version
Author(s)
McBeath, Sean T
Wilkinson, David P
Graham, Nigel JD
Type
Journal Article
Abstract
Boron-doped diamond (BDD) electrodes have the greatest known oxygen overpotential range; a characteristic that has allowed the material to be well suited for electro-oxidation processes in aqueous media. When operating in a potential range of water decomposition, strongly oxidising hydroxyl radicals are formed while oxygen evolution is minimised. The majority of research studies undertaken to-date have focused on the application of BDDs for the remediation of wastewater contaminants, however there is an increasing need for a suitable technology to address recalcitrant micropollutants in a drinking water context. Pesticide micropollutants are widely detected in surface- and ground-waters and are of increasing concern. In this paper, the treatment of pesticides by BDD electro-oxidation is reviewed. Their degradation and mineralisation, as well as the effect of operating conditions, formation of intermediate by-products, reaction pathways and kinetics are summarized. In general, BDD electro-oxidation was found to be effective for the degradation of pesticides with the degradation performance proportional to the electrolytic current, due principally to the increased generation of ˙OH radicals. Most contaminants followed pseudo first-order reaction kinetics under mass transport limitations. Generally, the same aromatic and aliphatic by-products were formed through similar oxidation pathways. Finally, research gaps and potential future research topics are discussed.
Date Acceptance
2019-09-22
Citation
Environmental Science: Water Research & Technology, 5 (12), pp.2090-2107
ISSN
2053-1400
Publisher
Royal Society of Chemistry (RSC)
Start Page
2090
End Page
2107
Journal / Book Title
Environmental Science: Water Research & Technology
Volume
5
Issue
12
Copyright Statement
© The Royal Society of Chemistry 2019.
Identifier
https://pubs.rsc.org/en/content/articlelanding/2019/EW/C9EW00589G#!divAbstract
Publication Status
Published online
Date Publish Online
2019-09-24