Evaluating membrane fouling potentials of dissolved organic matter in brackish water
| Autor: | Kyung Hwa Cho, Jeongyeop You, Taewoo Nam, Sanghun Park, Eun-Sik Kim, Ilhwan Choi, Jongkwan Park |
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| Rok vydání: | 2019 |
| Předmět: |
Environmental Engineering
0208 environmental biotechnology Size-exclusion chromatography 02 engineering and technology 010501 environmental sciences Mass spectrometry 01 natural sciences Gas Chromatography-Mass Spectrometry Dissolved organic carbon Organic matter Saline Waters Waste Management and Disposal Humic Substances 0105 earth and related environmental sciences Water Science and Technology Civil and Structural Engineering chemistry.chemical_classification Total organic carbon Chromatography Fouling Chemistry Ecological Modeling Membrane fouling Pollution Carbon 020801 environmental engineering Chromatography Gel Pyrolysis |
| Zdroj: | Water Research. 149:65-73 |
| ISSN: | 0043-1354 |
| Popis: | Isolating dissolved organic matter (DOM) is a preliminary step that improves the accuracy of its characterization. In this study, DOM in brackish water was clearly separated and evaluated by multiple characterization analyses. The sample was divided into three fractions by preparative high-performance liquid chromatography (preparative HPLC) according to molecular size. The homogeneity of each fraction was estimated by analytical size exclusion chromatography (SEC) and fluorescence excitation-emission matrix (FEEM). Pyrolysis gas chromatography-mass spectrometry (Py-GC/MS) and liquid chromatography-organic carbon detection (LC-OCD) were used to characterize the physicochemical properties of each fraction. Py-GC/MS revealed that Fraction 1 consisted of evenly distributed organic matter in order polysaccharides, proteins, polyhydroxy aromatics, lignins, and lipids. However, Fraction 2 was primarily composed of dominant lipids and low portion of proteins, and Fraction 3 was composed predominantly of lignins and lipids. The LC-OCD results showed that Fractions 1 and 2 had similar organic carbon (OC) compositions: a humic substance (ca. 37%), building blocks (ca. 10%), and neutrals (ca. 37%), whereas Fraction 3 contained a high proportion of neutrals (62%). In the fouling experiments, the distinct DOM characteristics in each fraction resulted in different declining flux behaviors, ranked as: Fraction 2 > Fraction 1 > Fraction 3. |
| Databáze: | OpenAIRE |
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