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https://ir.cnu.edu.tw/handle/310902800/34510
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| 標題: | Natural Organic Matter Removal from Raw Surface Water: Benchmarking Performance of Chemical Coagulants through Excitation-Emission Fluorescence Matrix Spectroscopy Analysis |
| 作者: | Go, Raymond John C.
Yang, Hui-Ling
Kan, Chi-Chuan
Ong, Dennis C.
Garcia-Segura, Sergi
de Luna, Mark Daniel G. |
| 貢獻者: | Univ Philippines Diliman, Environm Engn Program, Natl Grad Sch Engn
Feng Chia Univ, Dept Environm Engn & Sci
Chia Nan Univ Pharm & Sci, Inst Hot Spring Ind
Univ Philippines Visayas, Sch Technol
Arizona State Univ, Nanosyst Engn Res Ctr Nanotechnol Enabled Water T, Sch Sustainable Engn & Built Environm
Univ Philippines Diliman, Dept Chem Engn |
| 關鍵字: | coagulation
excitation-emission fluorescence matrix
full factorial design
natural organic matter
physical water treatment
raw surface water |
| 日期: | 2021 |
| 上傳時間: | 2023-11-11 12:00:00 (UTC+8) |
| 出版者: | MDPI |
| 摘要: | Chemical disinfection of surface waters has been proven effective in minimizing the risk of contamination by water-borne pathogens. However, surface waters contain natural organic matter (NOM) which, upon chemical disinfection, is readily converted into hazardous disinfection-by-products. Hence, NOM removal from these waters is critical. Chemical coagulation is a readily implementable technology to minimize these undesired side-effects by NOM removal. Herein, capabilities of ferric chloride (FeCl3) and polyaluminum chloride (PACl) as pre-treatment for NOM abatement from natural raw surface water have been benchmarked. Excitation-emission fluorescence matrix (EEM) spectroscopy characterization of NOM fractions demonstrated high removal efficiency. A two-level full factorial design was employed to analyze the effects of coagulant dosage and initial pH on the removal of turbidity, humic acid-like substances and fulvic acid-like substances from the raw water. Higher removal of similar to 77% NOM was attained with PACl than with FeCl3 (similar to 72%). Optimization through response surface methodology showed that the initial pH-coagulant dosage interaction was significant in removing NOM and turbidity for both PACl and FeCl3. These results identify the opportunity for coagulation technologies to prevent and minimize disinfection-by-products formation through NOM removal. |
| 關聯: | WATER-SUI, v.13, n.2, pp.146 |
| 显示于类别: | [觀光事業管理系(含溫泉所)] 期刊論文
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