Ultra-Stable Inorganic Mesoporous Membranes for Water Purification
Thin, supported inorganic mesoporous membranes are used for the removal of salts, small molecules (PFAS, dyes, and polyanions) and particulate species (oil droplets) from aqueous sources with high flux and selectivity. Nanofiltration membranes can reject simple salts with 80–100% selectivity through...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2024-01-01
|
| Series: | Membranes |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2077-0375/14/2/34 |
| _version_ | 1827343182293106688 |
|---|---|
| author | Ralph A. Bauer Minghui Qiu Melissa C. Schillo-Armstrong Matthew T. Snider Zi Yang Yi Zhou Hendrik Verweij |
| author_facet | Ralph A. Bauer Minghui Qiu Melissa C. Schillo-Armstrong Matthew T. Snider Zi Yang Yi Zhou Hendrik Verweij |
| author_sort | Ralph A. Bauer |
| collection | DOAJ |
| description | Thin, supported inorganic mesoporous membranes are used for the removal of salts, small molecules (PFAS, dyes, and polyanions) and particulate species (oil droplets) from aqueous sources with high flux and selectivity. Nanofiltration membranes can reject simple salts with 80–100% selectivity through a space charge mechanism. Rejection by size selectivity can be near 100% since the membranes can have a very narrow size distribution. Mesoporous membranes have received particular interest due to their (potential) stability under operational conditions and during defouling operations. More recently, membranes with extreme stability became interesting with the advent of in situ fouling mitigation by means of ultrasound emitted from within the membrane structure. For this reason, we explored the stability of available and new membranes with accelerated lifetime tests in aqueous solutions at various temperatures and pH values. Of the available ceria, titania, and magnetite membranes, none were actually stable under all test conditions. In earlier work, it was established that mesoporous alumina membranes have very poor stability. A new nanofiltration membrane was made of cubic zirconia membranes that exhibited near-perfect stability. A new ultrafiltration membrane was made of amorphous silica that was fully stable in ultrapure water at 80 °C. This work provides details of membrane synthesis, stability characterization and data and their interpretation. |
| first_indexed | 2024-03-07T22:21:29Z |
| format | Article |
| id | doaj.art-1fd19feea7dc455991fef36e5fce07a9 |
| institution | Directory Open Access Journal |
| issn | 2077-0375 |
| language | English |
| last_indexed | 2024-03-07T22:21:29Z |
| publishDate | 2024-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Membranes |
| spelling | doaj.art-1fd19feea7dc455991fef36e5fce07a92024-02-23T15:26:53ZengMDPI AGMembranes2077-03752024-01-011423410.3390/membranes14020034Ultra-Stable Inorganic Mesoporous Membranes for Water PurificationRalph A. Bauer0Minghui Qiu1Melissa C. Schillo-Armstrong2Matthew T. Snider3Zi Yang4Yi Zhou5Hendrik Verweij6Global Research and Development Inc., 539 Industrial Mile Road, Columbus, OH 43228, USAState Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, ChinaMinnesota Mining and Manufacturing Company, 2501 Hudson Road, Maplewood, MN 55144, USACarbon-Carbon Advanced Technologies, 4704 Eden Road, Arlington, TX 76001, USADepartment of Materials Science and Engineering, The Ohio State University, 140 W 19th Ave, Columbus, OH 43210, USAQuantumscape, 1730 Technology Drive, San Jose, CA 95110, USADepartment of Materials Science and Engineering, The Ohio State University, 140 W 19th Ave, Columbus, OH 43210, USAThin, supported inorganic mesoporous membranes are used for the removal of salts, small molecules (PFAS, dyes, and polyanions) and particulate species (oil droplets) from aqueous sources with high flux and selectivity. Nanofiltration membranes can reject simple salts with 80–100% selectivity through a space charge mechanism. Rejection by size selectivity can be near 100% since the membranes can have a very narrow size distribution. Mesoporous membranes have received particular interest due to their (potential) stability under operational conditions and during defouling operations. More recently, membranes with extreme stability became interesting with the advent of in situ fouling mitigation by means of ultrasound emitted from within the membrane structure. For this reason, we explored the stability of available and new membranes with accelerated lifetime tests in aqueous solutions at various temperatures and pH values. Of the available ceria, titania, and magnetite membranes, none were actually stable under all test conditions. In earlier work, it was established that mesoporous alumina membranes have very poor stability. A new nanofiltration membrane was made of cubic zirconia membranes that exhibited near-perfect stability. A new ultrafiltration membrane was made of amorphous silica that was fully stable in ultrapure water at 80 °C. This work provides details of membrane synthesis, stability characterization and data and their interpretation.https://www.mdpi.com/2077-0375/14/2/34inorganic membranesnanofiltrationultrafiltrationwater purification |
| spellingShingle | Ralph A. Bauer Minghui Qiu Melissa C. Schillo-Armstrong Matthew T. Snider Zi Yang Yi Zhou Hendrik Verweij Ultra-Stable Inorganic Mesoporous Membranes for Water Purification Membranes inorganic membranes nanofiltration ultrafiltration water purification |
| title | Ultra-Stable Inorganic Mesoporous Membranes for Water Purification |
| title_full | Ultra-Stable Inorganic Mesoporous Membranes for Water Purification |
| title_fullStr | Ultra-Stable Inorganic Mesoporous Membranes for Water Purification |
| title_full_unstemmed | Ultra-Stable Inorganic Mesoporous Membranes for Water Purification |
| title_short | Ultra-Stable Inorganic Mesoporous Membranes for Water Purification |
| title_sort | ultra stable inorganic mesoporous membranes for water purification |
| topic | inorganic membranes nanofiltration ultrafiltration water purification |
| url | https://www.mdpi.com/2077-0375/14/2/34 |
| work_keys_str_mv | AT ralphabauer ultrastableinorganicmesoporousmembranesforwaterpurification AT minghuiqiu ultrastableinorganicmesoporousmembranesforwaterpurification AT melissacschilloarmstrong ultrastableinorganicmesoporousmembranesforwaterpurification AT matthewtsnider ultrastableinorganicmesoporousmembranesforwaterpurification AT ziyang ultrastableinorganicmesoporousmembranesforwaterpurification AT yizhou ultrastableinorganicmesoporousmembranesforwaterpurification AT hendrikverweij ultrastableinorganicmesoporousmembranesforwaterpurification |