Ultrasonic Decomposition of (4-Chloro-2-methyl phenoxy)acetic Acid (MCPA) in Aqueous Solution

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Ultrasonic decomposition of (4-Chloro-2-methyl phenoxy)acetic acid (MCPA) in aqueous solution was performed at a frequency of 500 kHz under an argon atmosphere. We investigated the mechanism of ultrasonic degradation of MCPA by observing the decomposition time evolution of MCPA and the behaviors of chloride ion, TOC (total organic carbon), and byproducts formed through the ultrasonic degradation process of MCPA.<BR>At a constant power of 21.4 W, MCPA was completely decomposed after 180-min sonication and the ultrasonic decomposition of MCPA followed a pseudo first order reaction kinetics. Much of its chlorine atoms were mineralized in solution after 360-min sonication. On the other hand, it was difficult to achieve complete mineralization of carbon, and about 60% of the initial TOC remained in aqueous solution after 360 min. Based on the GC-MS analysis, byproducts such as 4-chloro-2-methyl phenol (CMP), 4-chlorocathecol, methylhydroquinone, cresol, acetic acid and formic acid were detected in the aqueous solution to which ultrasonic irradiation was applied. The CMP concentration increased during the early period of irradiation reaching a maximum concentration at about 60 min followed by its decrease until CMP became undetectable at 180 min. Decomposition of MCPA by ultrasonic irradiation resulted in the increase in acetic acid concentration until 120 min, after which no further increase was observed. Conversely, formic acid concentration was observed to increase only during the duration of sonication experiment.

収録刊行物

  • Journal of chemical engineering of Japan

    Journal of chemical engineering of Japan 36(7), 806-811, 2003-07-01

    公益社団法人 化学工学会

参考文献:  18件中 1-18件 を表示

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各種コード

  • NII論文ID(NAID)
    10013413816
  • NII書誌ID(NCID)
    AA00709658
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    00219592
  • NDL 記事登録ID
    6616667
  • NDL 雑誌分類
    ZP1(科学技術--化学・化学工業)
  • NDL 請求記号
    Z53-R395
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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