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대청호 유입 소하천 유기물질 유출 특성

Characteristics of Organic Matters in Small Streams into the Daecheong Reservoir

길기범|채민희|조윤해|석광설|김상욱
한국환경분석학회 (The Korean Society For Environmental Analysis)|2020.09|환경분석과 독성보건 (JOURNAL OF ENVIRONMENTAL ANALYSIS, HEALTH AND TOXICOLOGY)|제23권 제3호|pp. 155-164|DOI https://doi.org/10.36278/jeaht.23.3.155

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참고문헌

키워드

ROMTOCHydrophobicHydrophilicHumicXAD

초록

While BOD5 has been improved in Korea's major rivers and reservoirs over the last 10 years, CODMn is still on the rise. The purpose of this study was to investigate the leakage characteristics of refractory organic oatter (ROM) in Juwon stream and Pumgok stream flowing into Daecheong Reservoir, the most important drinking water source of Geum River basin. ROM was extracted with hydrophilic (Hi) and hydrophobic (Ho) organics using the XAD resin method. XAD analysis showed that hydrophobic ratios were 52.1–77.1 % and 52.7-97.1 % of dissolved organic carbon (DOC), respectively, in the Juwon and Pumgok streams. Hydrophobic organic matters were classified as humic substances originating from forest areas upstream of the watershed. In addition, the Ho/Hi ratio increased during the rainfall period (seven–nine months) and decreased during the non-rain period, and the Ho component, including hydrophobic acid (HoA) during rainfall, was the main component flowing into Daecheong Reservoir through the runoff. Total organic carbon (TOC) and COD showed a strong positive correlation between organics to confirm the association between ROMs. The results of this study confirmed the characteristics and background concentrations of the ROMs of some tributaries into the Daecheong Reservoir. In the future, continuous investigation and research will be needed to manage the natural organic matter of the main stream of Geum-river, including Daecheong Reservoir.

Abstract

While BOD5 has been improved in Korea's major rivers and reservoirs over the last 10 years, CODMn is still on the rise. The purpose of this study was to investigate the leakage characteristics of refractory organic oatter (ROM) in Juwon stream and Pumgok stream flowing into Daecheong Reservoir, the most important drinking water source of Geum River basin. ROM was extracted with hydrophilic (Hi) and hydrophobic (Ho) organics using the XAD resin method. XAD analysis showed that hydrophobic ratios were 52.1–77.1 % and 52.7-97.1 % of dissolved organic carbon (DOC), respectively, in the Juwon and Pumgok streams. Hydrophobic organic matters were classified as humic substances originating from forest areas upstream of the watershed. In addition, the Ho/Hi ratio increased during the rainfall period (seven–nine months) and decreased during the non-rain period, and the Ho component, including hydrophobic acid (HoA) during rainfall, was the main component flowing into Daecheong Reservoir through the runoff. Total organic carbon (TOC) and COD showed a strong positive correlation between organics to confirm the association between ROMs. The results of this study confirmed the characteristics and background concentrations of the ROMs of some tributaries into the Daecheong Reservoir. In the future, continuous investigation and research will be needed to manage the natural organic matter of the main stream of Geum-river, including Daecheong Reservoir.

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