Biofouling of reverse osmosis membranes: assessment by surface-enhanced Raman spectroscopy and microscopic imaging.
| Autor: | Benladghem Z; Antifungal Antibiotic: Physico-Chemical Synthesis and Biological Activity laboratory, Biology department, University of Tlemcen, Tlemcen, Algeria., Seddiki SML; Antifungal Antibiotic: Physico-Chemical Synthesis and Biological Activity laboratory, Biology department, University of Tlemcen, Tlemcen, Algeria.; Laboratory for Sustainable Management of Natural Resources in Arid and Semi-Arid Areas, University Center of Naâma, Naâma, Algeria., Dergal F; Scientific and Technical Research Center in Physico-Chemical Analysis, Tipaza, Algeria.; Laboratory of Catalysis and Synthesis in Organic Chemistry, Faculty of Sciences, University of Tlemcen, Algeria., Mahdad YM; Laboratory for Sustainable Management of Natural Resources in Arid and Semi-Arid Areas, University Center of Naâma, Naâma, Algeria.; Department of Physiology, Physiopathology and Biochemistry of Nutrition, University of Tlemcen, Tlemcen, Algeria., Aissaoui M; Department of Biology, Faculty of Sciences and Technology, University of Tamanghasset, Tamanghasset, Algeria., Choukchou-Braham N; Laboratory of Catalysis and Synthesis in Organic Chemistry, Faculty of Sciences, University of Tlemcen, Algeria. |
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| Jazyk: | angličtina |
| Zdroj: | Biofouling [Biofouling] 2022 Sep; Vol. 38 (8), pp. 852-864. Date of Electronic Publication: 2022 Oct 31. |
| DOI: | 10.1080/08927014.2022.2139610 |
| Abstrakt: | The decline in the performance of spiral-wound reverse osmosis (SWRO) membranes is frequently due to biofouling. This study focus on qualitative and quantitative diagnosis of SWRO membrane biofouling. Bacterial counts on the different surfaces of the fouled membranes were carried out. Surface enhanced Raman spectroscopy (SERS) was performed to highlight clogging materials as well as their natures and identity. The topography of the fouled membranes and the structures of biofilms were visualized by fluorescence microscopy (FM) and scanning electron microscopy (SEM). The results indicated the presence of bacteria in the different SWRO membrane areas. Those strongly adhered were significantly higher than those weakly. It varied between 26 × 10 5 and 262 × 10 5 CFU m -2 . However, SERS mapping showed different fouling levels and the thickness of the fouling layer was 5 µm. Microscopic imaging revealed biotic and abiotic deposits. These data can together allow better management of the seawater desalination process. |
| Databáze: | MEDLINE |
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