Covalent Crosslinking Cellulose/Graphene Aerogels with High Elasticity and Adsorbability for Heavy Metal Ions Adsorption
With the fast development of modern industry, heavy metal contaminant became more severe. How to remove heavy metal ions in water in a green and efficient way is a prominent problem in current environmental protection. The adsorption of cellulose aerogel as a novel heavy metal removal technology has...
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MDPI AG
2023-05-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/15/11/2434 |
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| author | Peipei Sun Meng Wang Tingting Wu Longsuo Guo Wenjia Han |
| author_facet | Peipei Sun Meng Wang Tingting Wu Longsuo Guo Wenjia Han |
| author_sort | Peipei Sun |
| collection | DOAJ |
| description | With the fast development of modern industry, heavy metal contaminant became more severe. How to remove heavy metal ions in water in a green and efficient way is a prominent problem in current environmental protection. The adsorption of cellulose aerogel as a novel heavy metal removal technology has many advantages, including abundant resources, environmental friendly, high specific surface, high porosities and without second pollution, which means it has a wide application prospect. Here, we reported a self-assembly and covalent crosslinking strategy to prepare elastic and porous cellulose aerogels using PVA and graphene and cellulose as precursor. The resulting cellulose aerogel had a low density of 12.31 mg cm<sup>−3</sup> and excellent mechanical properties, which can recover to its initial form at 80% compressive strain. Meanwhile, the cellulose aerogel had strong adsorption capacity of Cu<sup>2+</sup> (80.12 mg g<sup>−1</sup>), C<sub>d</sub><sup>2+</sup> (102.23 mg g<sup>−1</sup>), Cr<sup>3+</sup> (123.02 mg g<sup>−1</sup>), Co<sup>2+</sup> (62.38 mg g<sup>−1</sup>), Zn<sup>2+</sup> (69.55 mg g<sup>−1</sup>), and Pb<sup>2+</sup> (57.16 mg g<sup>−1</sup>). In addition, the adsorption mechanism of the cellulose aerogel was investigated using adsorption kinetics and adsorption isotherm, and the conclusion was that the adsorption process was mainly controlled by chemisorption mechanism. Therefore, cellulose aerogel, as a kind of green adsorption material, has a very high application potential in future water treatment applications. |
| first_indexed | 2024-03-11T02:58:15Z |
| format | Article |
| id | doaj.art-04adccb000e5455a90b3866a857d1dd8 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-11T02:58:15Z |
| publishDate | 2023-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-04adccb000e5455a90b3866a857d1dd82023-11-18T08:25:27ZengMDPI AGPolymers2073-43602023-05-011511243410.3390/polym15112434Covalent Crosslinking Cellulose/Graphene Aerogels with High Elasticity and Adsorbability for Heavy Metal Ions AdsorptionPeipei Sun0Meng Wang1Tingting Wu2Longsuo Guo3Wenjia Han4State Key Laboratory of Biobased Material and Green Papermaking, Advanced Materials Institute, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, ChinaState Key Laboratory of Biobased Material and Green Papermaking, Advanced Materials Institute, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, ChinaState Key Laboratory of Biobased Material and Green Papermaking, Advanced Materials Institute, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, ChinaState Key Laboratory of Biobased Material and Green Papermaking, Advanced Materials Institute, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, ChinaState Key Laboratory of Biobased Material and Green Papermaking, Advanced Materials Institute, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, ChinaWith the fast development of modern industry, heavy metal contaminant became more severe. How to remove heavy metal ions in water in a green and efficient way is a prominent problem in current environmental protection. The adsorption of cellulose aerogel as a novel heavy metal removal technology has many advantages, including abundant resources, environmental friendly, high specific surface, high porosities and without second pollution, which means it has a wide application prospect. Here, we reported a self-assembly and covalent crosslinking strategy to prepare elastic and porous cellulose aerogels using PVA and graphene and cellulose as precursor. The resulting cellulose aerogel had a low density of 12.31 mg cm<sup>−3</sup> and excellent mechanical properties, which can recover to its initial form at 80% compressive strain. Meanwhile, the cellulose aerogel had strong adsorption capacity of Cu<sup>2+</sup> (80.12 mg g<sup>−1</sup>), C<sub>d</sub><sup>2+</sup> (102.23 mg g<sup>−1</sup>), Cr<sup>3+</sup> (123.02 mg g<sup>−1</sup>), Co<sup>2+</sup> (62.38 mg g<sup>−1</sup>), Zn<sup>2+</sup> (69.55 mg g<sup>−1</sup>), and Pb<sup>2+</sup> (57.16 mg g<sup>−1</sup>). In addition, the adsorption mechanism of the cellulose aerogel was investigated using adsorption kinetics and adsorption isotherm, and the conclusion was that the adsorption process was mainly controlled by chemisorption mechanism. Therefore, cellulose aerogel, as a kind of green adsorption material, has a very high application potential in future water treatment applications.https://www.mdpi.com/2073-4360/15/11/2434cellulose nanofibersaerogeladsorptionheavy metal |
| spellingShingle | Peipei Sun Meng Wang Tingting Wu Longsuo Guo Wenjia Han Covalent Crosslinking Cellulose/Graphene Aerogels with High Elasticity and Adsorbability for Heavy Metal Ions Adsorption Polymers cellulose nanofibers aerogel adsorption heavy metal |
| title | Covalent Crosslinking Cellulose/Graphene Aerogels with High Elasticity and Adsorbability for Heavy Metal Ions Adsorption |
| title_full | Covalent Crosslinking Cellulose/Graphene Aerogels with High Elasticity and Adsorbability for Heavy Metal Ions Adsorption |
| title_fullStr | Covalent Crosslinking Cellulose/Graphene Aerogels with High Elasticity and Adsorbability for Heavy Metal Ions Adsorption |
| title_full_unstemmed | Covalent Crosslinking Cellulose/Graphene Aerogels with High Elasticity and Adsorbability for Heavy Metal Ions Adsorption |
| title_short | Covalent Crosslinking Cellulose/Graphene Aerogels with High Elasticity and Adsorbability for Heavy Metal Ions Adsorption |
| title_sort | covalent crosslinking cellulose graphene aerogels with high elasticity and adsorbability for heavy metal ions adsorption |
| topic | cellulose nanofibers aerogel adsorption heavy metal |
| url | https://www.mdpi.com/2073-4360/15/11/2434 |
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