Preparation of Reusable Porous Carbon Nanofibers from Oxidized Coal Liquefaction Residue for Efficient Adsorption in Water Treatment
Porous carbon nanofibers are commonly used for adsorption processes owing to their high specific surface area and rich pore structure. However, the poor mechanical properties of polyacrylonitrile (PAN)-based porous carbon nanofibers have limited their applications. Herein, we introduced solid waste-...
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MDPI AG
2023-05-01
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| Online Access: | https://www.mdpi.com/1996-1944/16/10/3614 |
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| author | Yaoyao Chen Kefu Wang Liqin Cao Xueli Huang Yizhao Li |
| author_facet | Yaoyao Chen Kefu Wang Liqin Cao Xueli Huang Yizhao Li |
| author_sort | Yaoyao Chen |
| collection | DOAJ |
| description | Porous carbon nanofibers are commonly used for adsorption processes owing to their high specific surface area and rich pore structure. However, the poor mechanical properties of polyacrylonitrile (PAN)-based porous carbon nanofibers have limited their applications. Herein, we introduced solid waste-derived oxidized coal liquefaction residue (OCLR) into PAN-based nanofibers to obtain activated reinforced porous carbon nanofibers (ARCNF) with enhanced mechanical properties and regeneration for efficient adsorption of organic dyes in wastewater. This study examined the effects of contact time, concentration, temperature, pH, and salinity on the adsorption capacity. The adsorption processes of the dyes in ARCNF are appropriately described by the pseudo-second-order kinetic model. The maximum adsorption capacity for malachite green (MG) on ARCNF is 2712.84 mg g<sup>−1</sup> according to the fitted parameters of the Langmuir model. Adsorption thermodynamics indicated that the adsorptions of the five dyes are spontaneous and endothermic processes. In addition, ARCNF have good regenerative performance, and the adsorption capacity of MG is still higher than 76% after 5 adsorption-desorption cycles. Our prepared ARCNF can efficiently adsorb organic dyes in wastewater, reducing the pollution to the environment and providing a new idea for solid waste recycling and water treatment. |
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| id | doaj.art-4a13d6e3435f422287f5fecccea2dc54 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-11T03:33:22Z |
| publishDate | 2023-05-01 |
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| spelling | doaj.art-4a13d6e3435f422287f5fecccea2dc542023-11-18T02:13:29ZengMDPI AGMaterials1996-19442023-05-011610361410.3390/ma16103614Preparation of Reusable Porous Carbon Nanofibers from Oxidized Coal Liquefaction Residue for Efficient Adsorption in Water TreatmentYaoyao Chen0Kefu Wang1Liqin Cao2Xueli Huang3Yizhao Li4State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemical Engineering and Technology, Xinjiang University, Urumqi 830017, ChinaState Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemical Engineering and Technology, Xinjiang University, Urumqi 830017, ChinaState Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemical Engineering and Technology, Xinjiang University, Urumqi 830017, ChinaState Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemical Engineering and Technology, Xinjiang University, Urumqi 830017, ChinaState Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemical Engineering and Technology, Xinjiang University, Urumqi 830017, ChinaPorous carbon nanofibers are commonly used for adsorption processes owing to their high specific surface area and rich pore structure. However, the poor mechanical properties of polyacrylonitrile (PAN)-based porous carbon nanofibers have limited their applications. Herein, we introduced solid waste-derived oxidized coal liquefaction residue (OCLR) into PAN-based nanofibers to obtain activated reinforced porous carbon nanofibers (ARCNF) with enhanced mechanical properties and regeneration for efficient adsorption of organic dyes in wastewater. This study examined the effects of contact time, concentration, temperature, pH, and salinity on the adsorption capacity. The adsorption processes of the dyes in ARCNF are appropriately described by the pseudo-second-order kinetic model. The maximum adsorption capacity for malachite green (MG) on ARCNF is 2712.84 mg g<sup>−1</sup> according to the fitted parameters of the Langmuir model. Adsorption thermodynamics indicated that the adsorptions of the five dyes are spontaneous and endothermic processes. In addition, ARCNF have good regenerative performance, and the adsorption capacity of MG is still higher than 76% after 5 adsorption-desorption cycles. Our prepared ARCNF can efficiently adsorb organic dyes in wastewater, reducing the pollution to the environment and providing a new idea for solid waste recycling and water treatment.https://www.mdpi.com/1996-1944/16/10/3614coal liquefaction residueelectrostatic spinningporous carbon nanofibersorganic dyesadsorption |
| spellingShingle | Yaoyao Chen Kefu Wang Liqin Cao Xueli Huang Yizhao Li Preparation of Reusable Porous Carbon Nanofibers from Oxidized Coal Liquefaction Residue for Efficient Adsorption in Water Treatment Materials coal liquefaction residue electrostatic spinning porous carbon nanofibers organic dyes adsorption |
| title | Preparation of Reusable Porous Carbon Nanofibers from Oxidized Coal Liquefaction Residue for Efficient Adsorption in Water Treatment |
| title_full | Preparation of Reusable Porous Carbon Nanofibers from Oxidized Coal Liquefaction Residue for Efficient Adsorption in Water Treatment |
| title_fullStr | Preparation of Reusable Porous Carbon Nanofibers from Oxidized Coal Liquefaction Residue for Efficient Adsorption in Water Treatment |
| title_full_unstemmed | Preparation of Reusable Porous Carbon Nanofibers from Oxidized Coal Liquefaction Residue for Efficient Adsorption in Water Treatment |
| title_short | Preparation of Reusable Porous Carbon Nanofibers from Oxidized Coal Liquefaction Residue for Efficient Adsorption in Water Treatment |
| title_sort | preparation of reusable porous carbon nanofibers from oxidized coal liquefaction residue for efficient adsorption in water treatment |
| topic | coal liquefaction residue electrostatic spinning porous carbon nanofibers organic dyes adsorption |
| url | https://www.mdpi.com/1996-1944/16/10/3614 |
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