Chia Nan University of Pharmacy & Science Institutional Repository:Item 310902800/28549
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    標題: Effect of operating parameters on triclosan degradation by Fenton's reagents combined with an electrochemical system
    作者: Methatham, Thanakorn
    Lu, Ming-Chun
    Ratanatamskul, Chavalit
    貢獻者: 環境資源管理系
    關鍵字: Fenton's reagents
    Electrochemical
    Triclosan
    Hydroxyl radicals
    Relative oxidation performance (ROP) ratio
    H2O2 feeding mode
    日期: 2014-01
    上傳時間: 2015-05-06 21:20:20 (UTC+8)
    出版者: Taylor & Francis Inc
    摘要: Triclosan is used as an antimicrobial in many processes. Fenton's reagents were used to degrade triclosan in combination with an electrochemical system, and the effects of operating parameters were investigated. The pH, current density, Fenton's reagents ratio, and H2O2 feeding modes were investigated to determine their effect on the process efficiency. The results showed that higher efficiency could be achieved by increasing the H2O2 concentration during Fenton's reagents ratio modification and by changing the H2O2 feeding mode development from a one-time initial feeding mode to a step feeding mode of operation. This could also reduce the toxicity potential of the one-time initial feeding mode. Under optimum pH, Fenton's reagents ratio, and electrical current density conditions, 1mM triclosan could be completely removed in the initial H2O2 feeding operation. Additionally, the initial degradation rate for the first-order model and relative oxidation performance ratio was used to indicate process optimization. High performance liquid chromatography, ion chromatograph data, and gas chromatography-mass spectrophotometer confirmation results were used to identify the intermediates that comprised 2,4-dichlorophenol, 4-chloro-catechol, phenol, hydroquinone, p-benzoquinone, maleic, acetic, oxalic, and formic acids, that were present among the degradation reactions. The main oxidation intermediates present depended on the H2O2 operating feeding mode.
    關聯: Desalination and Water Treatment, v.52 n.4-6, pp.920-928
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