Eco-Friendly OSN Membranes Based on Alginate Salts with Variable Nanofiltration Properties
In this work, membranes for organic solvents nanofiltration (OSN) based on a natural polymer, sodium alginate, were fabricated. They are chemically stable in organic solvents, including aprotic polar solvents. The unique advantage of these membranes is the absence of toxic reagents and solvents duri...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-02-01
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| Series: | Membranes |
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| Online Access: | https://www.mdpi.com/2077-0375/13/2/244 |
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| author | Evgenia Dmitrieva Alisa Raeva Daria Razlataya Tatyana Anokhina |
| author_facet | Evgenia Dmitrieva Alisa Raeva Daria Razlataya Tatyana Anokhina |
| author_sort | Evgenia Dmitrieva |
| collection | DOAJ |
| description | In this work, membranes for organic solvents nanofiltration (OSN) based on a natural polymer, sodium alginate, were fabricated. They are chemically stable in organic solvents, including aprotic polar solvents. The unique advantage of these membranes is the absence of toxic reagents and solvents during their production. This ensures the safety and environmental friendliness of the production process. It has been shown that an operation as simple as changing the cation in alginate (Cu<sup>2+</sup>, Fe<sup>3+</sup>, Cr<sup>3+</sup>, Al<sup>3+</sup>, Zn<sup>2+</sup>, Ca<sup>2+</sup>) makes it possible to control the transport and separating properties of membranes, depending on the organic solvent being separated. Therefore, to isolate RemazolBrilliant Blue with MM = 626 g·mol<sup>−1</sup> from ethanol, membranes based on iron alginate with a rejection <i>R</i> = 97% and a permeability of 1.5 kg·m<sup>−2</sup>·h<sup>−1</sup>·bar<sup>−1</sup> are the most efficient. For isolation of the same solute from DMF and MP, membranes based on calcium alginate with an <i>R</i> of about 90% and a permeability of 0.1–0.2 kg·m<sup>−2</sup>·h<sup>−1</sup>·bar<sup>−1</sup> are the most efficient. The resulting membranes based on natural biodegradable sodium alginate are competitive compared to membranes based on synthetic polymers. |
| first_indexed | 2024-03-11T08:26:50Z |
| format | Article |
| id | doaj.art-fe7634ac535b4082a2dc2a51371daf53 |
| institution | Directory Open Access Journal |
| issn | 2077-0375 |
| language | English |
| last_indexed | 2024-03-11T08:26:50Z |
| publishDate | 2023-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Membranes |
| spelling | doaj.art-fe7634ac535b4082a2dc2a51371daf532023-11-16T22:03:17ZengMDPI AGMembranes2077-03752023-02-0113224410.3390/membranes13020244Eco-Friendly OSN Membranes Based on Alginate Salts with Variable Nanofiltration PropertiesEvgenia Dmitrieva0Alisa Raeva1Daria Razlataya2Tatyana Anokhina3A.V. Topchiev Institute of Petrochemical Synthesis RAS, Leninsky pr. 29, 119991 Moscow, RussiaA.V. Topchiev Institute of Petrochemical Synthesis RAS, Leninsky pr. 29, 119991 Moscow, RussiaA.V. Topchiev Institute of Petrochemical Synthesis RAS, Leninsky pr. 29, 119991 Moscow, RussiaA.V. Topchiev Institute of Petrochemical Synthesis RAS, Leninsky pr. 29, 119991 Moscow, RussiaIn this work, membranes for organic solvents nanofiltration (OSN) based on a natural polymer, sodium alginate, were fabricated. They are chemically stable in organic solvents, including aprotic polar solvents. The unique advantage of these membranes is the absence of toxic reagents and solvents during their production. This ensures the safety and environmental friendliness of the production process. It has been shown that an operation as simple as changing the cation in alginate (Cu<sup>2+</sup>, Fe<sup>3+</sup>, Cr<sup>3+</sup>, Al<sup>3+</sup>, Zn<sup>2+</sup>, Ca<sup>2+</sup>) makes it possible to control the transport and separating properties of membranes, depending on the organic solvent being separated. Therefore, to isolate RemazolBrilliant Blue with MM = 626 g·mol<sup>−1</sup> from ethanol, membranes based on iron alginate with a rejection <i>R</i> = 97% and a permeability of 1.5 kg·m<sup>−2</sup>·h<sup>−1</sup>·bar<sup>−1</sup> are the most efficient. For isolation of the same solute from DMF and MP, membranes based on calcium alginate with an <i>R</i> of about 90% and a permeability of 0.1–0.2 kg·m<sup>−2</sup>·h<sup>−1</sup>·bar<sup>−1</sup> are the most efficient. The resulting membranes based on natural biodegradable sodium alginate are competitive compared to membranes based on synthetic polymers.https://www.mdpi.com/2077-0375/13/2/244organic solvent nanofiltration (OSN)polymeric membranesnatural polymerssodium alginateionic crosslinkingmetal cations |
| spellingShingle | Evgenia Dmitrieva Alisa Raeva Daria Razlataya Tatyana Anokhina Eco-Friendly OSN Membranes Based on Alginate Salts with Variable Nanofiltration Properties Membranes organic solvent nanofiltration (OSN) polymeric membranes natural polymers sodium alginate ionic crosslinking metal cations |
| title | Eco-Friendly OSN Membranes Based on Alginate Salts with Variable Nanofiltration Properties |
| title_full | Eco-Friendly OSN Membranes Based on Alginate Salts with Variable Nanofiltration Properties |
| title_fullStr | Eco-Friendly OSN Membranes Based on Alginate Salts with Variable Nanofiltration Properties |
| title_full_unstemmed | Eco-Friendly OSN Membranes Based on Alginate Salts with Variable Nanofiltration Properties |
| title_short | Eco-Friendly OSN Membranes Based on Alginate Salts with Variable Nanofiltration Properties |
| title_sort | eco friendly osn membranes based on alginate salts with variable nanofiltration properties |
| topic | organic solvent nanofiltration (OSN) polymeric membranes natural polymers sodium alginate ionic crosslinking metal cations |
| url | https://www.mdpi.com/2077-0375/13/2/244 |
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