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ID 14654
file
creator
Nam, Se Young
Lim, Jae Lim
Shin, Hang Sik
subject
base-catalyst
cannizzaro reactoin
dichloroacetic acid
ethanol
hydrothermal dechlorination
insolubilization
NDC
Pollution. Environmental engineering
description
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.
journal title
Chemosphere
volume
Volume 53
issue
Issue 1
start page
97
end page
100
date of issued
2003-10
publisher
Elsevier
issn
0045-6535
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
author
rights
Copyright (c) 2003 Elsevier Ltd.
relation is version of URL
http://dx.doi.org/10.1016/S0045-6535(03)00361-8
department
Institute for Waste Waters Treatment