전구물질의 소수성 및 친수성 특성에 따른 트리할로메탄의 생성과 제거에 관한 연구Formation and Removal of Trihalomethanes based on Characterization of Hydrophobic and Hydrophilic Precursors
- Other Titles
- Formation and Removal of Trihalomethanes based on Characterization of Hydrophobic and Hydrophilic Precursors
- Authors
- 전희경; 김준성; 최윤찬; 최해연; 정용
- Issue Date
- Jan-2008
- Publisher
- 한국물환경학회
- Keywords
- Disinfection by-product; Formation potential; Hydrophilic substance; Hydrophobic substance; Precursor; Trihalomethane; Disinfection by-product; Formation potential; Hydrophilic substance; Hydrophobic substance; Precursor; Trihalomethane
- Citation
- 한국물환경학회지, v.24, no.1, pp 123 - 128
- Pages
- 6
- Journal Title
- 한국물환경학회지
- Volume
- 24
- Number
- 1
- Start Page
- 123
- End Page
- 128
- URI
- https://scholarworks.sookmyung.ac.kr/handle/2020.sw.sookmyung/52704
- ISSN
- 2289-0971
2289-098X
- Abstract
- The Dissolved Organic Carbon (DOC) existing in a water includes both hydrophobic and hydrophilic substances however,
most of the discussion focuses on hydrophobic substances. The hydrophobic fraction was easily removed by absorption or
coagulation more than hydrophilic fraction. Therefore, control of the hydrophilic fraction is very important in water treatment
process. This study is to determine the variation of DOC, the removal efficiency of DOC, and Trihalomethane formation
potential (THMFP) after each stage of water treatment process by fractionating Natural Organic Matters (NOM) into
hydrophobic and hydrophilic substance. DOC from raw water was fractionated at acidic pH (pH<2) using XAD 8 resin
column, into two fraction : hydrophobic substance (i.e. humic substance) adsorbed on XAD 8 and hydrophilic substance which
represent the organics contained in the final effluent. THMFP was carried out according to the following set condition:
Cl2/DOC=4 mg/mg, incubation at 25°C in darkness, pH 7 adjust with HCl or NaOH as necessary, and 72hour-contact time.
THMs analyzed in this study were chloroform, bromodichloromethane, dibromochloromethan, and bromoform. Sewage was
almost evenly split between the hydrophobic (56%) and hydrophilic fraction (44%). But, Aldrich humic substance (AHS) was
found to contain less hydrophilics (14%) than hydrophobics (86%). The formation of THMs may depend on the source which
is characterized by the composition of organic matters such as AHS and sewage. The THMFP yield of sewage and AHS were
assessed as follows. The value of the THMFP reaction yield, AHS 172.65 μg/mg, is much higher than that of sewage 41.68 μ
g/mg. This illustrates possible significant difference in THMFP according to the component type and the proportion of organic
matter existing in water source. Apparently AHS react with chlorine to produce more THMFP than do the smaller molecules
found in sewage. Water treatment process may reduce THMFP, nevertheless residual DOC (the more hydrophilic substance)
has significant THMFP. Further reduction in organic halide precursors requires application of alternative treatment techniques
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