Recyclable Magnetic Iron Immobilized onto Chitosan with Bridging Cu Ion for the Enhanced Adsorption of Methyl Orange
Chitosan (CS) is a natural and low-cost adsorbent for capturing metal ions and organic compounds. However, the high solubility of CS in acidic solution would make it difficult to recycle the adsorbent from the liquid phase. In this study, the CS/Fe<sub>3</sub>O<sub>4</sub> wa...
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| Format: | Article |
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MDPI AG
2023-03-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/28/5/2307 |
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| author | Daoguang Teng Peng Jin Wenhuan Guo Jiang Liu Wei Wang Peng Li Yijun Cao Ling Zhang Ying Zhang |
| author_facet | Daoguang Teng Peng Jin Wenhuan Guo Jiang Liu Wei Wang Peng Li Yijun Cao Ling Zhang Ying Zhang |
| author_sort | Daoguang Teng |
| collection | DOAJ |
| description | Chitosan (CS) is a natural and low-cost adsorbent for capturing metal ions and organic compounds. However, the high solubility of CS in acidic solution would make it difficult to recycle the adsorbent from the liquid phase. In this study, the CS/Fe<sub>3</sub>O<sub>4</sub> was prepared via Fe<sub>3</sub>O<sub>4</sub> nanoparticles immobilized onto a CS surface, and the DCS/Fe<sub>3</sub>O<sub>4</sub>-Cu was further fabricated after surface modification and the adsorption of Cu ions. The meticulously tailored material displayed the sub-micron size of an agglomerated structure with numerous magnetic Fe<sub>3</sub>O<sub>4</sub> nanoparticles. During the adsorption of methyl orange (MO), the DCS/Fe<sub>3</sub>O<sub>4</sub>-Cu delivered a superior removal efficiency of 96.4% at 40 min, which is more than twice the removal efficiency of 38.7% for pristine CS/Fe<sub>3</sub>O<sub>4</sub>. At an initial MO concentration of 100 mg L<sup>−1</sup>, the DCS/Fe<sub>3</sub>O<sub>4</sub>-Cu exhibited the maximum adsorption capacity of 144.60 mg g<sup>−1</sup>. The experimental data were well explained by the pseudo-second-order model and Langmuir isotherm, suggesting the dominant monolayer adsorption. The composite adsorbent still maintained a large removal rate of 93.5% after five regeneration cycles. This work develops an effective strategy to simultaneously achieve high adsorption performance and convenient recyclability for wastewater treatment. |
| first_indexed | 2024-03-11T07:17:03Z |
| format | Article |
| id | doaj.art-d84bd5db75e24702b2fe4d7006320158 |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-11T07:17:03Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-d84bd5db75e24702b2fe4d70063201582023-11-17T08:14:53ZengMDPI AGMolecules1420-30492023-03-01285230710.3390/molecules28052307Recyclable Magnetic Iron Immobilized onto Chitosan with Bridging Cu Ion for the Enhanced Adsorption of Methyl OrangeDaoguang Teng0Peng Jin1Wenhuan Guo2Jiang Liu3Wei Wang4Peng Li5Yijun Cao6Ling Zhang7Ying Zhang8Zhongyuan Critical Metals Laboratory, Zhengzhou University, Zhengzhou 450001, ChinaSchool of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, ChinaSchool of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, ChinaZhongyuan Critical Metals Laboratory, Zhengzhou University, Zhengzhou 450001, ChinaZhongyuan Critical Metals Laboratory, Zhengzhou University, Zhengzhou 450001, ChinaSchool of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, ChinaZhongyuan Critical Metals Laboratory, Zhengzhou University, Zhengzhou 450001, ChinaZhongyuan Critical Metals Laboratory, Zhengzhou University, Zhengzhou 450001, ChinaZhongyuan Critical Metals Laboratory, Zhengzhou University, Zhengzhou 450001, ChinaChitosan (CS) is a natural and low-cost adsorbent for capturing metal ions and organic compounds. However, the high solubility of CS in acidic solution would make it difficult to recycle the adsorbent from the liquid phase. In this study, the CS/Fe<sub>3</sub>O<sub>4</sub> was prepared via Fe<sub>3</sub>O<sub>4</sub> nanoparticles immobilized onto a CS surface, and the DCS/Fe<sub>3</sub>O<sub>4</sub>-Cu was further fabricated after surface modification and the adsorption of Cu ions. The meticulously tailored material displayed the sub-micron size of an agglomerated structure with numerous magnetic Fe<sub>3</sub>O<sub>4</sub> nanoparticles. During the adsorption of methyl orange (MO), the DCS/Fe<sub>3</sub>O<sub>4</sub>-Cu delivered a superior removal efficiency of 96.4% at 40 min, which is more than twice the removal efficiency of 38.7% for pristine CS/Fe<sub>3</sub>O<sub>4</sub>. At an initial MO concentration of 100 mg L<sup>−1</sup>, the DCS/Fe<sub>3</sub>O<sub>4</sub>-Cu exhibited the maximum adsorption capacity of 144.60 mg g<sup>−1</sup>. The experimental data were well explained by the pseudo-second-order model and Langmuir isotherm, suggesting the dominant monolayer adsorption. The composite adsorbent still maintained a large removal rate of 93.5% after five regeneration cycles. This work develops an effective strategy to simultaneously achieve high adsorption performance and convenient recyclability for wastewater treatment.https://www.mdpi.com/1420-3049/28/5/2307magneticchitosanbridging Curecyclable adsorbentmethyl orange |
| spellingShingle | Daoguang Teng Peng Jin Wenhuan Guo Jiang Liu Wei Wang Peng Li Yijun Cao Ling Zhang Ying Zhang Recyclable Magnetic Iron Immobilized onto Chitosan with Bridging Cu Ion for the Enhanced Adsorption of Methyl Orange Molecules magnetic chitosan bridging Cu recyclable adsorbent methyl orange |
| title | Recyclable Magnetic Iron Immobilized onto Chitosan with Bridging Cu Ion for the Enhanced Adsorption of Methyl Orange |
| title_full | Recyclable Magnetic Iron Immobilized onto Chitosan with Bridging Cu Ion for the Enhanced Adsorption of Methyl Orange |
| title_fullStr | Recyclable Magnetic Iron Immobilized onto Chitosan with Bridging Cu Ion for the Enhanced Adsorption of Methyl Orange |
| title_full_unstemmed | Recyclable Magnetic Iron Immobilized onto Chitosan with Bridging Cu Ion for the Enhanced Adsorption of Methyl Orange |
| title_short | Recyclable Magnetic Iron Immobilized onto Chitosan with Bridging Cu Ion for the Enhanced Adsorption of Methyl Orange |
| title_sort | recyclable magnetic iron immobilized onto chitosan with bridging cu ion for the enhanced adsorption of methyl orange |
| topic | magnetic chitosan bridging Cu recyclable adsorbent methyl orange |
| url | https://www.mdpi.com/1420-3049/28/5/2307 |
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