수영강의 유기물질의 특성 및 계절적 변화

Abstract

Aquatic organic matter present mostly dissolved organic matter(DOM) in all natural waters. Aesthetic problems and hazardous materials such as amounts of trace elements may be attached to organic material. Also DOMs have been recognized disinfection by-products precursors(DBPs) during the chlorination process, many ways may affect the unit operations in water treatment. BOD and COD are currently used for water quality indices, but BOD test takes too much time to provide timely information to the operator for control purposes. In addition COD test is relatively resistant to some organic matter and may give a falsely low COD. Therefore, BOD and COD were inappropriate indices as effective water management. TOC tend to distinct organic matter concentration and low error range than BOD and COD. Accordingly, the properties of organic matters investigated in the Suyeong river. This study analyzed monthly tendency of DOM and characteristics changes of dissolved organic matter presented by flowing in non-point source through rainfall. The hydrophobic DOM of the upstream are generally higher than the downstream. The hydrophilic DOM in spring and fall are increased but tends to decrease in summer and winter. The hydrophilic DOM of rainfall is higher than pre-rainfall. Also BDOC is slightly increased. Consequently, the hydrophilic component is a major organic matter flowing into the watershed at rainfall. The result of interpreting the correlation of dissolved organic matters and RDOC, correlation coefficient of TOC and RDOC were highest by 0.934. Because refractory organic matter at BOD test was unmeasured, whereas TOC test was effectively reflected agree of refractory organic matter.