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ID 14654
本文ファイル
著者
Nam, Se Young
Lim, Jae Lim
Shin, Hang Sik
キーワード
base-catalyst
cannizzaro reactoin
dichloroacetic acid
ethanol
hydrothermal dechlorination
insolubilization
NDC
公害・環境工学
内容記述
Dichloroacetic acid (DCAA) is produced during the oxidation of trichloroethylene. It is also produced in drinking water treatment as a disinfection by-product. DCAA is a problem material, because of its toxicity. The objective of this research is to find the final products and the reaction pathway of the DCAA decomposition by hydrolysis, and to increase the hydrolysis rate. The removal of both chlorine atoms in DCAA structure was achieved with hydrolysis at around 75 °C, and the final products were oxalic acid and glycolic acid. The reaction pathway was the production of oxalic acid and glycolic acid from two glyoxylic acid molecules by Cannizzaro reaction after the glyoxylic acid production from dechlorination of DCAA with hydrolysis. The hydrolysis rate of DCAA was increased with the use of 90 1.140250e-268thanol solution as solvent. The activation energy of DCAA was about 80 kJ/mol in it, while it was around 105 kJ/mol in water.
掲載誌名
Chemosphere
53巻
1号
開始ページ
97
終了ページ
100
出版年月日
2003-10
出版者
Elsevier
ISSN
0045-6535
言語
英語
NII資源タイプ
学術雑誌論文
広大資料タイプ
学術雑誌論文
DCMIタイプ
text
フォーマット
application/pdf
著者版フラグ
author
権利情報
Copyright (c) 2003 Elsevier Ltd.
関連情報URL(IsVersionOf)
http://dx.doi.org/10.1016/S0045-6535(03)00361-8
部局名
環境安全センター