Investigations on the Water Pollution Index. VIII. On the CODMn of Dicarboxylic Acids and Unsaturated Fatty Acids

• Published in: Eisei kagaku Vol. 35; no. 1; pp. 86 - 92
• Main Authors: MATSUMOTO, HISAO, MIYAJIMA, SACHIKO, MATSUMOTO, REIKO
• Format: Journal Article
• Language: English; Japanese
• Published: The Pharmaceutical Society of Japan 01.01.1989
• Subjects: catalytic effect; chemical oxygen demand; decomposition rate; dicarboxylic acid; silver nitrate; unsaturated carboxylic acid; water pollution
• ISSN: 0013-273X
• DOI: 10.1248/jhs1956.35.86

COD values (with permanganate) of dicarboxylic acids and unsaturated acids were investigated by the micro titration method previously reported. Dicarboxylic acids will be contained in various industrial effluents and produced during the COD treatment of unsaturated acids. Unsaturated carboxylic acids are constituents of oils extracted from plants or fishes and contained in the domestic effluents. In the case of dicarboxylic acids having longer carbon chain, marked promotion effects of AgNO3 added into a reaction medium on the COD values were recognized. Average oxydation rate to the perfect oxydation was 12.4%. In alkaline method, oxydation rate was very low values of 0.636%. Oxydation rate by BOD determination was very high rate of 72.1%. In the case of unsaturated acids, the COD values were corresponded to the numbers of unsaturated bonds. Oxydation rate was 39.3% in the acidic and 31.8% in the alkaline method. Determination of reaction products will be reported in the latter.