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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 14, Number 1
JKCSEZ 14(1)
February 20, 1970 

Geochemical Investigations of Contaminated River Waters Part Ⅱ-Chemical Oxygen Demand of River Water and Industrial Waste Water in Seoul

오탁하천수의 지구화학적인 연구 (제 Ⅱ 보) 서울시내 하천수 및 공장배수의 화학적 산소요구량
Yong Keun Lee

River water and industrial waste water in Seoul were studied by means of chemical oxygen demand(COD) as an indicator for water pollution, from August 1967 to July 1968. Rivers flowing through residential and industrial areas are badly contaminated and COD of water in Han River increases as it progresses to downstream. Seasonal variation of COD showed that higher value of COD was observed in spring and lower in autumn. It is clear that the seasonal variation of COD is influenced by the precipitation. Close relationship was found between COD and population density. The lowest COD curve obtained by plotting COD values against population density and show that the curve slopes upward. The discontinuation of the curve was shown at the population density of 14,000/km2; an increase in COD was acute over the population density of 14,000/km2.
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