Recyclable Magnesium-Modified Biochar Beads for Efficient Removal of Phosphate from Wastewater
Although ball milling is effective for biochar modification with metal oxides for efficient phosphate removal, the recyclability of the adsorbent as well as the precursors for modification, still need to be optimized. Herein, a magnesium-modified biochar was first prepared with the precursor of MgCl...
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MDPI AG
2023-03-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/13/6/966 |
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| author | Biao Hu Nina Yan Zhiyu Zheng Lei Xu Hongde Xie Jingwen Chen |
| author_facet | Biao Hu Nina Yan Zhiyu Zheng Lei Xu Hongde Xie Jingwen Chen |
| author_sort | Biao Hu |
| collection | DOAJ |
| description | Although ball milling is effective for biochar modification with metal oxides for efficient phosphate removal, the recyclability of the adsorbent as well as the precursors for modification, still need to be optimized. Herein, a magnesium-modified biochar was first prepared with the precursor of MgCl<sub>2</sub>·6H<sub>2</sub>O through the solvent-free ball milling method. After that, recyclable biochar beads were fabricated with the introduction of sodium alginate and Fe<sub>3</sub>O<sub>4.</sub> The beads were proved to have excellent adsorption performance for phosphate with a saturated capacity of 53.2 mg g<sup>−1</sup>, which is over 12 times higher than that of pristine biochar beads. Although the particle size reduction, surface area, and O-containing group increments after milling are beneficial for adsorption, the remarkable promotion in performance should mainly result from the appropriate formation of magniferous crystals on biochar, which greatly accelerates the electrostatic interactions as well as precipitation for adsorption. The beads also exhibited excellent magnetism-driven recyclability, which greatly avoids secondary contamination and broadens the application field of the adsorbent. |
| first_indexed | 2024-03-11T06:05:48Z |
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| id | doaj.art-0aa132d47e74455a8b32a039df3ace0b |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-11T06:05:48Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
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| series | Nanomaterials |
| spelling | doaj.art-0aa132d47e74455a8b32a039df3ace0b2023-11-17T12:59:38ZengMDPI AGNanomaterials2079-49912023-03-0113696610.3390/nano13060966Recyclable Magnesium-Modified Biochar Beads for Efficient Removal of Phosphate from WastewaterBiao Hu0Nina Yan1Zhiyu Zheng2Lei Xu3Hongde Xie4Jingwen Chen5College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, ChinaKey Laboratory for Protected Agricultural Engineering in the Middle and Lower Reaches of Yangtze River, Institute of Agricultural Facilities and Equipment, Jiangsu Academy of Agricultural Sciences, Ministry of Agriculture and Rural Affairs, Nanjing 210014, ChinaKey Laboratory for Protected Agricultural Engineering in the Middle and Lower Reaches of Yangtze River, Institute of Agricultural Facilities and Equipment, Jiangsu Academy of Agricultural Sciences, Ministry of Agriculture and Rural Affairs, Nanjing 210014, ChinaKey Laboratory for Protected Agricultural Engineering in the Middle and Lower Reaches of Yangtze River, Institute of Agricultural Facilities and Equipment, Jiangsu Academy of Agricultural Sciences, Ministry of Agriculture and Rural Affairs, Nanjing 210014, ChinaCollege of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, ChinaKey Laboratory for Protected Agricultural Engineering in the Middle and Lower Reaches of Yangtze River, Institute of Agricultural Facilities and Equipment, Jiangsu Academy of Agricultural Sciences, Ministry of Agriculture and Rural Affairs, Nanjing 210014, ChinaAlthough ball milling is effective for biochar modification with metal oxides for efficient phosphate removal, the recyclability of the adsorbent as well as the precursors for modification, still need to be optimized. Herein, a magnesium-modified biochar was first prepared with the precursor of MgCl<sub>2</sub>·6H<sub>2</sub>O through the solvent-free ball milling method. After that, recyclable biochar beads were fabricated with the introduction of sodium alginate and Fe<sub>3</sub>O<sub>4.</sub> The beads were proved to have excellent adsorption performance for phosphate with a saturated capacity of 53.2 mg g<sup>−1</sup>, which is over 12 times higher than that of pristine biochar beads. Although the particle size reduction, surface area, and O-containing group increments after milling are beneficial for adsorption, the remarkable promotion in performance should mainly result from the appropriate formation of magniferous crystals on biochar, which greatly accelerates the electrostatic interactions as well as precipitation for adsorption. The beads also exhibited excellent magnetism-driven recyclability, which greatly avoids secondary contamination and broadens the application field of the adsorbent.https://www.mdpi.com/2079-4991/13/6/966biocharmodificationadsorptionphosphatesodium alginaterecyclable |
| spellingShingle | Biao Hu Nina Yan Zhiyu Zheng Lei Xu Hongde Xie Jingwen Chen Recyclable Magnesium-Modified Biochar Beads for Efficient Removal of Phosphate from Wastewater Nanomaterials biochar modification adsorption phosphate sodium alginate recyclable |
| title | Recyclable Magnesium-Modified Biochar Beads for Efficient Removal of Phosphate from Wastewater |
| title_full | Recyclable Magnesium-Modified Biochar Beads for Efficient Removal of Phosphate from Wastewater |
| title_fullStr | Recyclable Magnesium-Modified Biochar Beads for Efficient Removal of Phosphate from Wastewater |
| title_full_unstemmed | Recyclable Magnesium-Modified Biochar Beads for Efficient Removal of Phosphate from Wastewater |
| title_short | Recyclable Magnesium-Modified Biochar Beads for Efficient Removal of Phosphate from Wastewater |
| title_sort | recyclable magnesium modified biochar beads for efficient removal of phosphate from wastewater |
| topic | biochar modification adsorption phosphate sodium alginate recyclable |
| url | https://www.mdpi.com/2079-4991/13/6/966 |
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