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KMID : 1171820070220030013
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Journal of Environmental and Sanitary Engineering
2007 Volume.22 No. 3 p.13 ~ p.26
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Study on the characterization of dissolved organic matters in Nakdong River
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Heo Seong-Nam
Park Jung-Min
Im Tae-Hyo
Shin Chan-Ki
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Abstract
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Changes in the characteristics of dissolved organic matter was studied at selected stations in the Nakdong river basin using physical and chemical methods. Characteristics of dissolved organic matters were analysed and assessed. Production of disinfection byproducts were also investigated. 1. Result of relatedness study among each items of analyses showed that relatedness On BOD values were highest with cattle excrement treatment facilities where there is nosynthetic organic materials and relatedness on CODMd were highest at the mainstream Nakdong river. In case of CODcr (which has more oxidative power than CODMd), the values were higher in the sidestreams indicating the higher content of recalcitrant compounds. The relatedness values for the UV₂?₄also showed higher values in the sidestreams and treatment facilities than mainstream indicating the presence of organic aromatic compounds. 2. Ratio of DOC on total organic carbon were higher in the mainstream which is attributable to the influent particulate organic materials produced by agricultural activities. The values were 10-15% higher in the mainstream compared with sidestreams. 3. Result of biodegradability test indicate that concentrations of recalcitrant DOC were higher in the sidestreams than in the mainstream. The values of recalcitrant DOC were higher with the forest stream indicating the effect of soil oriented humic substances. 4. Result of THM production test carried out at 10 stations in the Nakdong river show that CHCl? was detected with the highest value and the value was highest at Waekwan station.
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KEYWORD
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recalcitrant compounds, organic aromatic compounds, biodegradability
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