Issue 3, 2021

Enhanced degradation of triclosan using UV–Fe2+ synergistic activation of peracetic acid

Abstract

UV/Fe2+/peracetic acid (PAA) as an efficient and novel advanced oxidation system was reported to produce reactive species (i.e., hydroxyl radicals (˙OH) and organic radicals) for triclosan (TCS) degradation, which is a representative of pharmaceutical and personal care products (PPCPs). The effects of initial pH, PAA dosage and common water matrix on TCS degradation were investigated. The results indicated that 1 μmol L−1 TCS was completely removed within 10 min at an optimum initial pH of 3.5, Fe2+ dosage of 10 μmol L−1, PAA dosage of 1 mmol L−1 and temperature of 25 °C. The presence of HCO3 and natural organic matter (NOM) showed obviously negative effect on TCS degradation, while NO3 strongly promoted the destruction of TCS. According to the detected nine reaction products, the probable degradation pathways of TCS by UV/Fe2+/PAA were proposed including ether bond cleavage, hydroxylation, dechlorination, dechlorination–hydroxylation and dehydrogenation.

Graphical abstract: Enhanced degradation of triclosan using UV–Fe2+ synergistic activation of peracetic acid

Article information

Article type
Paper
Submitted
12 Dec 2020
Accepted
28 Jan 2021
First published
28 Jan 2021

Environ. Sci.: Water Res. Technol., 2021,7, 630-637

Enhanced degradation of triclosan using UV–Fe2+ synergistic activation of peracetic acid

S. Wang, Z. Chen, Z. Wang, Y. Fu and Y. Liu, Environ. Sci.: Water Res. Technol., 2021, 7, 630 DOI: 10.1039/D0EW01095B

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