A Novel Ionic Exchange Membrane Crystallizer to Recover Magnesium Hydroxide from Seawater and Industrial Brines
A novel technology, the ion exchange membrane crystallizer (CrIEM), that combines reactive and membrane crystallization, was investigated in order to recover high purity magnesium hydroxide from multi-component artificial and natural solutions. In particular, in a CrIEM reactor, the presence of an a...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-10-01
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| Series: | Membranes |
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| Online Access: | https://www.mdpi.com/2077-0375/10/11/303 |
| _version_ | 1797549978055344128 |
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| author | Daniele La Corte Fabrizio Vassallo Andrea Cipollina Marian Turek Alessandro Tamburini Giorgio Micale |
| author_facet | Daniele La Corte Fabrizio Vassallo Andrea Cipollina Marian Turek Alessandro Tamburini Giorgio Micale |
| author_sort | Daniele La Corte |
| collection | DOAJ |
| description | A novel technology, the ion exchange membrane crystallizer (CrIEM), that combines reactive and membrane crystallization, was investigated in order to recover high purity magnesium hydroxide from multi-component artificial and natural solutions. In particular, in a CrIEM reactor, the presence of an anion exchange membrane (AEM), which separates two-compartment containing a saline solution and an alkaline solution, allows the passage of hydroxyl ions from the alkaline to the saline solution compartment, where crystallization of magnesium hydroxide occurs, yet avoiding a direct mixing between the solutions feeding the reactor. This enables the use of low-cost reactants (e.g., Ca(OH)<sub>2</sub>) without the risk of co-precipitation of by-products and contamination of the final crystals. An experimental campaign was carried out treating two types of feed solution, namely: (1) a waste industrial brine from the Bolesław Śmiały coal mine in Łaziska Górne (Poland) and (2) Mediterranean seawater, collected from the North Sicilian coast (Italy). The CrIEM was tested in a feed and bleed modality in order to operate in a continuous mode. The Mg<sup>2+</sup> concentration in the feed solutions ranges from 0.7 to 3.2 g/L. Magnesium recovery efficiencies from 89 up to 100% were reached, while magnesium hydroxide purity between 94% and 98.8% was obtained. |
| first_indexed | 2024-03-10T15:22:45Z |
| format | Article |
| id | doaj.art-7f82ce363d274fa8b4cd99f4885875f3 |
| institution | Directory Open Access Journal |
| issn | 2077-0375 |
| language | English |
| last_indexed | 2024-03-10T15:22:45Z |
| publishDate | 2020-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Membranes |
| spelling | doaj.art-7f82ce363d274fa8b4cd99f4885875f32023-11-20T18:22:36ZengMDPI AGMembranes2077-03752020-10-01101130310.3390/membranes10110303A Novel Ionic Exchange Membrane Crystallizer to Recover Magnesium Hydroxide from Seawater and Industrial BrinesDaniele La Corte0Fabrizio Vassallo1Andrea Cipollina2Marian Turek3Alessandro Tamburini4Giorgio Micale5Dipartimento di Ingegneria, Università di Palermo-Viale delle Scienze ed.8, 90128 Palermo, ItalyDipartimento di Ingegneria, Università di Palermo-Viale delle Scienze ed.8, 90128 Palermo, ItalyDipartimento di Ingegneria, Università di Palermo-Viale delle Scienze ed.8, 90128 Palermo, ItalyFaculty of Chemistry, Department of Inorganic, Analytical Chemistry and Electrochemistry, Silesian University of Technology (SUT)—B. Krzywoustego 6, 44-100 Gliwice, PolandDipartimento di Ingegneria, Università di Palermo-Viale delle Scienze ed.8, 90128 Palermo, ItalyDipartimento di Ingegneria, Università di Palermo-Viale delle Scienze ed.8, 90128 Palermo, ItalyA novel technology, the ion exchange membrane crystallizer (CrIEM), that combines reactive and membrane crystallization, was investigated in order to recover high purity magnesium hydroxide from multi-component artificial and natural solutions. In particular, in a CrIEM reactor, the presence of an anion exchange membrane (AEM), which separates two-compartment containing a saline solution and an alkaline solution, allows the passage of hydroxyl ions from the alkaline to the saline solution compartment, where crystallization of magnesium hydroxide occurs, yet avoiding a direct mixing between the solutions feeding the reactor. This enables the use of low-cost reactants (e.g., Ca(OH)<sub>2</sub>) without the risk of co-precipitation of by-products and contamination of the final crystals. An experimental campaign was carried out treating two types of feed solution, namely: (1) a waste industrial brine from the Bolesław Śmiały coal mine in Łaziska Górne (Poland) and (2) Mediterranean seawater, collected from the North Sicilian coast (Italy). The CrIEM was tested in a feed and bleed modality in order to operate in a continuous mode. The Mg<sup>2+</sup> concentration in the feed solutions ranges from 0.7 to 3.2 g/L. Magnesium recovery efficiencies from 89 up to 100% were reached, while magnesium hydroxide purity between 94% and 98.8% was obtained.https://www.mdpi.com/2077-0375/10/11/303membrane crystallizerbrine valorisationbitternwastewatercritical raw material |
| spellingShingle | Daniele La Corte Fabrizio Vassallo Andrea Cipollina Marian Turek Alessandro Tamburini Giorgio Micale A Novel Ionic Exchange Membrane Crystallizer to Recover Magnesium Hydroxide from Seawater and Industrial Brines Membranes membrane crystallizer brine valorisation bittern wastewater critical raw material |
| title | A Novel Ionic Exchange Membrane Crystallizer to Recover Magnesium Hydroxide from Seawater and Industrial Brines |
| title_full | A Novel Ionic Exchange Membrane Crystallizer to Recover Magnesium Hydroxide from Seawater and Industrial Brines |
| title_fullStr | A Novel Ionic Exchange Membrane Crystallizer to Recover Magnesium Hydroxide from Seawater and Industrial Brines |
| title_full_unstemmed | A Novel Ionic Exchange Membrane Crystallizer to Recover Magnesium Hydroxide from Seawater and Industrial Brines |
| title_short | A Novel Ionic Exchange Membrane Crystallizer to Recover Magnesium Hydroxide from Seawater and Industrial Brines |
| title_sort | novel ionic exchange membrane crystallizer to recover magnesium hydroxide from seawater and industrial brines |
| topic | membrane crystallizer brine valorisation bittern wastewater critical raw material |
| url | https://www.mdpi.com/2077-0375/10/11/303 |
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