Recyclable Adsorbents for Potash Brine Desalination Based on Silicate Powder: Application, Regeneration and Utilization
Silicate mineral powders (SMP) from weathered granite soil from Kazakhstan are proposed for the desalination of potash brines containing sodium, potassium and chloride ions. Batch adsorption experiments using acid-treated silicate (AS) achieved a Na<sup>+</sup>/K<sup>+</sup>/...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-10-01
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| Series: | Colloids and Interfaces |
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| Online Access: | https://www.mdpi.com/2504-5377/7/4/61 |
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| author | Akmaral B. Rakhym Zarina Ye. Baranchiyeva Aruzhan K. Kenessova Bagashar B. Zhaksybai Diana N. Dauzhanova Yitzhak Mastai Gulziya A. Seilkhanova |
| author_facet | Akmaral B. Rakhym Zarina Ye. Baranchiyeva Aruzhan K. Kenessova Bagashar B. Zhaksybai Diana N. Dauzhanova Yitzhak Mastai Gulziya A. Seilkhanova |
| author_sort | Akmaral B. Rakhym |
| collection | DOAJ |
| description | Silicate mineral powders (SMP) from weathered granite soil from Kazakhstan are proposed for the desalination of potash brines containing sodium, potassium and chloride ions. Batch adsorption experiments using acid-treated silicate (AS) achieved a Na<sup>+</sup>/K<sup>+</sup>/Cl<sup>−</sup> recovery of ~13/28/6 mg/g. An isothermal study best fitted the Freundlich and Dubinin–Radushkevich models for Na<sup>+</sup> and K<sup>+</sup>/Cl<sup>−</sup>. The kinetic data were best modeled by pseudo-second-order kinetics for Na<sup>+</sup>/K<sup>+</sup> and pseudo-first-order for Cl<sup>−</sup>. Thermodynamic calculations showed spontaneity under natural conditions. For Na<sup>+</sup>/K<sup>+</sup>, physisorption is accompanied by ion exchange. To study the possibility of sorbent reuse, several cycles of K<sup>+</sup>/Na<sup>+</sup> adsorption–desorption were carried out under optimal conditions. AS selectively adsorbed potassium ions, maintaining a high effectiveness during five cycles providing K-form silicate fertilizers. Leachates of spent AS contain high concentrations of K/Na/Ca/Mg and other microelements essential for plants. Thus, SMP resolve two issues: the desalination of brine and the provision of fertilizer. |
| first_indexed | 2024-03-08T20:52:57Z |
| format | Article |
| id | doaj.art-9f841337fc844c5ab4b5c6e584647d3c |
| institution | Directory Open Access Journal |
| issn | 2504-5377 |
| language | English |
| last_indexed | 2024-03-08T20:52:57Z |
| publishDate | 2023-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Colloids and Interfaces |
| spelling | doaj.art-9f841337fc844c5ab4b5c6e584647d3c2023-12-22T14:01:08ZengMDPI AGColloids and Interfaces2504-53772023-10-01746110.3390/colloids7040061Recyclable Adsorbents for Potash Brine Desalination Based on Silicate Powder: Application, Regeneration and UtilizationAkmaral B. Rakhym0Zarina Ye. Baranchiyeva1Aruzhan K. Kenessova2Bagashar B. Zhaksybai3Diana N. Dauzhanova4Yitzhak Mastai5Gulziya A. Seilkhanova6Faculty of Chemistry and Chemical Technology, Al-Farabi Kazakh National University, Almaty 050040, KazakhstanFaculty of Chemistry and Chemical Technology, Al-Farabi Kazakh National University, Almaty 050040, KazakhstanFaculty of Chemistry and Chemical Technology, Al-Farabi Kazakh National University, Almaty 050040, KazakhstanFaculty of Chemistry and Chemical Technology, Al-Farabi Kazakh National University, Almaty 050040, KazakhstanFaculty of Chemistry and Chemical Technology, Al-Farabi Kazakh National University, Almaty 050040, KazakhstanDepartment of Chemistry and the Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat-Gan 5290002, IsraelFaculty of Chemistry and Chemical Technology, Al-Farabi Kazakh National University, Almaty 050040, KazakhstanSilicate mineral powders (SMP) from weathered granite soil from Kazakhstan are proposed for the desalination of potash brines containing sodium, potassium and chloride ions. Batch adsorption experiments using acid-treated silicate (AS) achieved a Na<sup>+</sup>/K<sup>+</sup>/Cl<sup>−</sup> recovery of ~13/28/6 mg/g. An isothermal study best fitted the Freundlich and Dubinin–Radushkevich models for Na<sup>+</sup> and K<sup>+</sup>/Cl<sup>−</sup>. The kinetic data were best modeled by pseudo-second-order kinetics for Na<sup>+</sup>/K<sup>+</sup> and pseudo-first-order for Cl<sup>−</sup>. Thermodynamic calculations showed spontaneity under natural conditions. For Na<sup>+</sup>/K<sup>+</sup>, physisorption is accompanied by ion exchange. To study the possibility of sorbent reuse, several cycles of K<sup>+</sup>/Na<sup>+</sup> adsorption–desorption were carried out under optimal conditions. AS selectively adsorbed potassium ions, maintaining a high effectiveness during five cycles providing K-form silicate fertilizers. Leachates of spent AS contain high concentrations of K/Na/Ca/Mg and other microelements essential for plants. Thus, SMP resolve two issues: the desalination of brine and the provision of fertilizer.https://www.mdpi.com/2504-5377/7/4/61silicate mineral powderssodium adsorptionpotassium adsorptionchloride adsorptionsorbent regenerationK-silicate fertilizer |
| spellingShingle | Akmaral B. Rakhym Zarina Ye. Baranchiyeva Aruzhan K. Kenessova Bagashar B. Zhaksybai Diana N. Dauzhanova Yitzhak Mastai Gulziya A. Seilkhanova Recyclable Adsorbents for Potash Brine Desalination Based on Silicate Powder: Application, Regeneration and Utilization Colloids and Interfaces silicate mineral powders sodium adsorption potassium adsorption chloride adsorption sorbent regeneration K-silicate fertilizer |
| title | Recyclable Adsorbents for Potash Brine Desalination Based on Silicate Powder: Application, Regeneration and Utilization |
| title_full | Recyclable Adsorbents for Potash Brine Desalination Based on Silicate Powder: Application, Regeneration and Utilization |
| title_fullStr | Recyclable Adsorbents for Potash Brine Desalination Based on Silicate Powder: Application, Regeneration and Utilization |
| title_full_unstemmed | Recyclable Adsorbents for Potash Brine Desalination Based on Silicate Powder: Application, Regeneration and Utilization |
| title_short | Recyclable Adsorbents for Potash Brine Desalination Based on Silicate Powder: Application, Regeneration and Utilization |
| title_sort | recyclable adsorbents for potash brine desalination based on silicate powder application regeneration and utilization |
| topic | silicate mineral powders sodium adsorption potassium adsorption chloride adsorption sorbent regeneration K-silicate fertilizer |
| url | https://www.mdpi.com/2504-5377/7/4/61 |
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