The presence of triclosan (TCS, 5-chloro-2-(2,4-dichlorophenoxy)phenol) in water resources, an important antimicrobial agent used in many pharmaceuticals and personal care products (PPCPs), has invoked significant concern from water authorities and industries. Though significant attention has been given to advanced oxidation processes (AOPs) to decompose recalcitrant organic contaminants, emphasis have been on Fenton reaction and other hydroxyl radicals�based AOPs for the decomposition of TCS and other PPCPs. Fenton reaction, however, has several drawbacks for practical applications, including pH dependence, problems associated with iron precipitation, and slow kinetics of iron regeneration. Sulfate radicals (SRs)-based AOPs have been recently found to also effectively decompose organic chemicals. Our research focuses on the destruction of TCS using SRs, generated by the transition metal activation of common oxidants, in our effort to propose SRs-based AOPs as an alternative to the well-established HRs-based AOPs for the decomposition of TCS and other emerging chemicals of concern.

Sulfate radicals-based degradation of triclosan

244th National Meeting (2012)

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