Iron-Loaded Carbon Aerogels Derived from Bamboo Cellulose Fibers as Efficient Adsorbents for Cr(VI) Removal
Open accessAbstract
A unique iron/carbon aerogel (Fe/CA) was prepared via pyrolysis using ferric nitrate and bamboo cellulose fibers as the precursors, which could be used for high-efficiency removal of toxic Cr(VI) from wastewaters. Its composition and crystalline structures were characterized by FTIR, XPS, and XRD. In SEM images, the aerogel was highly porous with abundant interconnected pores, and its carbon-fiber skeleton was evenly covered by iron particles. Such structures greatly promoted both adsorption and redox reaction of Cr(VI) and endowed Fe/CA with a superb adsorption capacity of Cr(VI) (182 mg/g) with a fast adsorption rate (only 8 min to reach adsorption equilibrium), which outperformed many other adsorbents. Furthermore, the adsorption kinetics and isotherms were also investigated. The experiment data could be much better fitted by the pseudo-second-order kinetics model with a high correlating coefficient, suggesting that the Cr(VI) adsorption of Fe/CA was a chemical adsorption process. Meanwhile, the Langmuir model was found to better describe the isotherm curves, which implied the possible monolayer adsorption mechanism. It is noteworthy that the aerogel adsorbent as a bulk material could be easily separated from the water after adsorption, showing high potential in real-world water treatment.
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The enhanced HER activity is expected due to increased Fe content, interaction between iron and bio-based carbon aerogels, and presence of carbon nanotubes that enhance electron transport.
“This enhanced HER activity is expected not only because of the increased Fe content, and the interaction between iron and the bio-based carbon aerogels 46 , but also due to the presence of carbon nanotubes that can enhance the electron transport characteristics.”
From Boosting hydrogen production with raspberry-derived carbon aerogels with <i>in situ</i> grown carbon nanotubes (2026) · cites this paper as [46]
The Results and Discussion (§3.1) show that iron was incorporated into the bamboo-derived carbon aerogel and that some iron reacted with carbon to form Fe–C. The paper links this structure to Cr(VI) removal, not to enhanced hydrogen evolution reaction (HER) activity. The carbon-nanotube explanation appears after this citation and is not attributed to this source. (LLM, conf=0.86)
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Rubalcaba-Medina, A., Rodríguez-Macias, F. J., Sanchez-Mendoza, Y. A., Jiménez-Salinas, S., Rafei, M., Gracia-Espino, E., & Vega-Cantu, Y. I. (2026) · Energy Advances · doi:10.1039/d5ya00133a · Cited by 1 · see citing works
- Authors
- Xue, X., Yuan, W., Zheng, Z., Zhang, J., Ao, C., Zhao, J., Wang, Q., Zhang, W., & Lu, C.
- Affiliations
- Sichuan University (CN)
- Corresponding author
- Zhang, Wei
- Lu, Canhui
- Venue
- Polymers
- Publisher
- MDPI AG
- Published
- 2021-12-11
- Volume
- 13
- Issue
- 24
- Pages
- 4338
- ISSN
- 2073-4360 (ISSN-L)
- PMC
- PMC8703939
- OpenAlex
- W4200189379
- Cited by
- 18
- References
- 50
- Citations by year
- 2026: 3 · 2025: 3 · 2024: 3 · 2023: 7 · 2022: 2
- FWCI
- 0.89
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- Locations
- Polymers (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- Funders
- National Natural Science Foundation of China (51861165203)
- Sichuan Science and Technology Program (2019YJ0125 and 2020YJ0261)
- the State Key Laboratory of Polymer Materials Engineering (sklpme2019-2-19)
- the Program for Featured Directions of Engineering Multidisciplines of Sichuan University (2020SCUNG203)
- the Fundamental Research Funds for Central Universities, the Opening Project of Guangxi Key Laboratory of Calcium Carbonate Resources Comprehensive Utilization (HZXYKFKT201902)
- the Special Foundation for Innovation-Driven Development of Hezhou (Hekechuang PT0710004)
- Topics
- Physical Sciences › Environmental Science › Water Science and Technology › Adsorption and biosorption for pollutant removal
- Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Chromium effects and bioremediation
- Physical Sciences › Engineering › Biomedical Engineering › Environmental remediation with nanomaterials
- Keywords
- hexavalent chromium removal, Cr(VI) adsorption, pyrolysis, porous carbon, adsorption kinetics, adsorption isotherms, pseudo-second-order kinetics, Langmuir isotherm, heavy metal wastewater treatment, redox reactions
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