Fouling of Nanofiltration, Reverse Osmosis, and Ultrafiltration Membranes by Protein Mixtures: The Role of Inter-Foulant-Species Interaction
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| Názov: | Fouling of Nanofiltration, Reverse Osmosis, and Ultrafiltration Membranes by Protein Mixtures: The Role of Inter-Foulant-Species Interaction |
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| Autori: | Tang, CY, Wang, YN |
| Zdroj: | Environmental Science & Technology. 45:6373-6379 |
| Informácie o vydavateľovi: | American Chemical Society (ACS), 2011. |
| Rok vydania: | 2011 |
| Predmety: | Osmosis, Membranes, Muramidase - Chemistry, Biofouling, Osmolar Concentration, Ultrafiltration, Ultrafiltration - Methods, Membranes, Artificial, Serum Albumin, Bovine, 02 engineering and technology, Hydrogen-Ion Concentration, 6. Clean water, Serum Albumin, Bovine - Chemistry, Solutions, Bovine - Chemistry, Artificial, Animals, Nanotechnology, Cattle, Muramidase, 0204 chemical engineering, 0210 nano-technology, Serum Albumin, Nanotechnology - Methods |
| Popis: | Protein fouling of nanofiltration (NF), reverse osmosis (RO), and ultrafiltration (UF) membranes by bovine serum albumin (BSA), lysozyme (LYS), and their mixture was investigated under cross-flow conditions. The effect of solution chemistry, membrane properties, and permeate flux level was systematically studied. When the solution pH was within the isoelectric points (IEPs) of the two proteins (i.e., pH 4.7-10.4), the mixed protein system experienced more severe flux decline compared to the respective single protein systems, which may be attributed to the electrostatic attraction between the negatively charged BSA and positively charged LYS molecules. Unlike a typical single protein system, membrane fouling by BSA-LYS mixture was only weakly dependent on solution pH within this pH range, and increased ionic strength was found to enhance the membrane flux as a result of the suppressed BSA-LYS electrostatic attraction. Membrane fouling was likely controlled by foulant-fouled-membrane interaction under severe fouling conditions (elevated flux level and unfavorable solution chemistry that promotes fouling), whereas it was likely dominated by foulant-clean-membrane interaction under mild fouling conditions. Compared to nonporous NF and RO membranes, the porous UF membrane was more susceptible to dramatic flux decline due to the increased risk of membrane pore plugging. This study reveals that membrane fouling by mixed macromolecules may behave very differently from that by typical single foulant system, especially when the inter-foulant-species interaction dominates over the intra-species interaction in the mixed foulant system. |
| Druh dokumentu: | Article |
| Jazyk: | English |
| ISSN: | 1520-5851 0013-936X |
| DOI: | 10.1021/es2013177 |
| Prístupová URL adresa: | https://pubmed.ncbi.nlm.nih.gov/21678956 https://ui.adsabs.harvard.edu/abs/2011EnST...45.6373W/abstract https://pubs.acs.org/doi/10.1021/es2013177 https://europepmc.org/article/MED/21678956 https://pubmed.ncbi.nlm.nih.gov/21678956/ https://www.ncbi.nlm.nih.gov/pubmed/21678956 https://core.ac.uk/display/152870840 http://hdl.handle.net/10722/185405 |
| Prístupové číslo: | edsair.doi.dedup.....776946991f5e3ebcdbb1744f2d8ca688 |
| Databáza: | OpenAIRE |
Nájsť tento článok vo Web of Science | Abstrakt: | Protein fouling of nanofiltration (NF), reverse osmosis (RO), and ultrafiltration (UF) membranes by bovine serum albumin (BSA), lysozyme (LYS), and their mixture was investigated under cross-flow conditions. The effect of solution chemistry, membrane properties, and permeate flux level was systematically studied. When the solution pH was within the isoelectric points (IEPs) of the two proteins (i.e., pH 4.7-10.4), the mixed protein system experienced more severe flux decline compared to the respective single protein systems, which may be attributed to the electrostatic attraction between the negatively charged BSA and positively charged LYS molecules. Unlike a typical single protein system, membrane fouling by BSA-LYS mixture was only weakly dependent on solution pH within this pH range, and increased ionic strength was found to enhance the membrane flux as a result of the suppressed BSA-LYS electrostatic attraction. Membrane fouling was likely controlled by foulant-fouled-membrane interaction under severe fouling conditions (elevated flux level and unfavorable solution chemistry that promotes fouling), whereas it was likely dominated by foulant-clean-membrane interaction under mild fouling conditions. Compared to nonporous NF and RO membranes, the porous UF membrane was more susceptible to dramatic flux decline due to the increased risk of membrane pore plugging. This study reveals that membrane fouling by mixed macromolecules may behave very differently from that by typical single foulant system, especially when the inter-foulant-species interaction dominates over the intra-species interaction in the mixed foulant system. |
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| ISSN: | 15205851 0013936X |
| DOI: | 10.1021/es2013177 |