Electrochemical Degradation of Triclosan at a Ti/SnO2‐Sb/Ce‐PbO2 Anode. Issue 6 (4th February 2015)

• Record Type: Journal Article
• Authors: Maharana, Dusmant; Niu, Junfeng; Rao, Neti Nageswara; Xu, Zesheng; Shi, Jianghong
• Is Part Of: Clean. Volume 43:Issue 6(2015:Jun.)
• Page Start: 958
• Page End: 966
• Publication Date: 2015-02-04
• Subjects: Water quality -- Periodicals; Water -- Pollution -- Periodicals; Pollution -- Periodicals; Bioremediation -- Periodicals; Sewage -- Periodicals; Water chemistry -- Periodicals; 333.7205
• DOI: 10.1002/clen.201400180
• Languages: English
• ISSNs: 1863-0650

Abstract

<abstract abstract-type="main" xml:lang="en"> <title> <x xml:space="preserve">Abstract</x> </title> <sec id="clen201400180-sec-0001" sec-type="section"> <p>Electrochemical degradation of an emerging contaminant, triclosan (5‐chloro‐2‐(2, 4‐dichlorophenoxy) phenol) by a Ti/SnO₂‐Sb/Ce‐PbO₂ anode was investigated. The degradation efficiency attained &gt;99.9% during 5 min of electrolysis at all influential factors, <italic>i.e</italic>., applied current density (2–10 mA/cm²), pH 3–11, inter‐electrode distance (1–4 cm), initial concentration (0.5–5 mg/L triclosan) and supporting electrolyte (10 mmol/L NaCl). Total organic carbon removal ratio achieved 79.7% at the optimal conditions after 2 min of electrolysis. The electrochemical degradation of triclosan followed pseudo‐first‐order kinetics. The intermediate products namely 2, 4‐dichlorophenol, 5‐chloro‐3‐(chlorohydroquinone) phenol and 2‐chloro‐5‐(2, 4‐dichlorophenoxy) benzene‐1, 4‐diol were prominently detected using liquid chromatography–tandem mass spectrometry. A degradation mechanism of triclosan at the Ti/SnO₂‐Sb/Ce‐PbO₂ anode was proposed based on the intermediates. The energy consumption of triclosan (4 mg/L) degradation at different electrode distances (1–4 cm) was 0.466–2.225 kWh m⁻³. The Ti/SnO₂‐Sb/Ce‐PbO₂ anodes can be employed preliminary for rapid degradation of triclosan in wastewater.</p> </sec> </abstract>