자외선/H2O2 처리시 남조류 기인 유기물 특성이 수산화 라디칼 반응성 및 운전조건에 미치는 영향

• Published in: 한국수처리학회지, 28(4) pp. 15 - 23
• Main Authors: 남숙현, 이주원, 김은주, 황태문
• Format: Journal Article
• Language: Korean
• Published: 한국수처리학회 01.08.2020
• Subjects: 토목공학
• ISSN: 1225-7192; 2289-0076
• DOI: 10.17640/KSWST.2020.28.4.15

This study interrogates the influence of algal organic matter on hydroxyl radial (•OH) scavenging factors. The •OH scavenging factor represents the rate at which •OH is scavenged by background substances in aqueous solutions, which is key to the design and operation of UV/H2O2 processes for water treatment. Extracellular organic matter (EOM) and intracellular organic matter (IOM) were extracted from cyanobacteria acquired from lake water. Synthetic water was manufactured by using either EOM or IOM, and the resulting hydroxyl radical scavenging factors were measured and compared. The organic properties of the EOM and IOM were analyzed by using liquid chromatography organic carbon detection (LC-OCD) and fluorescence excitation-emission matrices (F-FEM). Analyses revealed that EOM samples exhibited strong peaks associated with tryptophan-like, fulvic-like, and humic-like (excitation/emission 250-260/380-480) substances. By comparison, the tryptophan-like peak was dominant in IOM samples. Six components were observed in LC-OCD chromatograms, with neutrals being the highest component of both of EOM and IOM, yet EOM also had high humics and LMW acids. This study proposes a predictive model that estimates the optimal UV and H2O2 doses necessary to maximize the removal of target compounds. Removal of 90% of the target compound (D90) required 6.8 mg/L of hydrogen peroxide at 1200 mJ/㎠. When comparing theoretical prediction with experimental values, the difference in the elimination rate was less than 10%. KCI Citation Count: 0