High-Rate Degradation of Dichloromethane by Combination of UV Irradiation and Consecutive Addition of Hydrogen Peroxide.

• HIRATA Akira

  Department of Chemical Engineering, Waseda University

• ISHII Jun

  Department of Chemical Engineering, Waseda University

• TSUNEDA Satoshi

  Department of Chemical Engineering, Waseda University

Bibliographic Information

Other Title

• 紫外線照射と過酸化水素逐次添加を併用したジクロロメタンの高速分解処理
• シガイセン ショウシャ ト カサンカスイソ チクジ テンカ オ ヘイヨウ シタ ジクロロメタン ノ コウソク ブンカイ ショリ

Abstract

Degradation kinetics of dichloromethane in water were investigated in a rectangular quartz cell under combination of UV irradiation and hydrogen peroxide (H₂O₂) addition. The presence of H₂O₂ not only enhanced the degradation rate of dichloromethane but prevented the formation of other chlorinated organic compounds as transient intermediates to mineralization. Since H₂O₂ was consumed by UV at a much higher rate than dichloromethane, it was found that the consecutive addition of H₂O₂ was highly effective to maintain high-rate degradation of dichloromethane. When 2,000 mg·l^-1 of H₂O₂ was added every 5 min, the decomposition rate of 1,500 mg·l^-1 dichloromethane exhibited 9.3 times higher than that of one-time addition of H₂O₂. Moreover, we successfully demonstrated that the degradation rate of dichloromethane was almost proportional to the square of incident light intensity.

Journal

• Journal of Japan Society on Water Environment

  Journal of Japan Society on Water Environment 22 (5), 396-402, 1999

  Japan Society on Water Environment

Keywords

• dichloromethane
• UV irradiation
• hydrogen peroxide
• consecutive addition
• degradation

Details

• CRID: 1390001205080842624
• NII Article ID: 10004452394
• NII Book ID: AN10372439
• DOI: 10.2965/jswe.22.396
• COI: 1:CAS:528:DyaK1MXksVWqtbY%3D
• ISSN: 18813690
• ISSN: 09168958
• ISSN: http://id.crossref.org/issn/0021485X
• ISSN: http://id.crossref.org/issn/01472011
• NDL BIB ID: 4728817
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4728817
• Web Site: https://www.jstage.jst.go.jp/article/jswe/22/5/22_5_396/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed