{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,26]],"date-time":"2026-09-26T15:14:55Z","timestamp":1790435695489,"version":"4.1.0"},"reference-count":50,"publisher":"MDPI AG","issue":"24","license":[{"start":{"date-parts":[[2021,12,11]],"date-time":"2021-12-11T00:00:00Z","timestamp":1639180800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["51861165203"],"award-info":[{"award-number":["51861165203"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Sichuan Science and Technology Program","award":["2019YJ0125 and 2020YJ0261"],"award-info":[{"award-number":["2019YJ0125 and 2020YJ0261"]}]},{"name":"the State Key Laboratory of Polymer Materials Engineering","award":["sklpme2019-2-19"],"award-info":[{"award-number":["sklpme2019-2-19"]}]},{"name":"the Program for Featured Directions of Engineering  Multidisciplines of Sichuan University","award":["2020SCUNG203"],"award-info":[{"award-number":["2020SCUNG203"]}]},{"name":"the Fundamental Research Funds for Central Universities, the Opening Project of Guangxi Key Laboratory of Calcium Carbonate Resources Comprehensive Utilization","award":["HZXYKFKT201902"],"award-info":[{"award-number":["HZXYKFKT201902"]}]},{"name":"the Special Foundation for Innovation-Driven Development of Hezhou","award":["Hekechuang PT0710004"],"award-info":[{"award-number":["Hekechuang PT0710004"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Polymers"],"abstract":"<jats:p>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.<\/jats:p>","DOI":"10.3390\/polym13244338","type":"journal-article","created":{"date-parts":[[2021,12,13]],"date-time":"2021-12-13T01:29:33Z","timestamp":1639358973000},"page":"4338","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":18,"title":["Iron-Loaded Carbon Aerogels Derived from Bamboo Cellulose Fibers as Efficient Adsorbents for Cr(VI) Removal"],"prefix":"10.3390","volume":"13","author":[{"given":"Xiaolin","family":"Xue","sequence":"first","affiliation":[{"name":"State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute at Sichuan University, Chengdu 610065, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wei","family":"Yuan","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute at Sichuan University, Chengdu 610065, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhuo","family":"Zheng","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute at Sichuan University, Chengdu 610065, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jian","family":"Zhang","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute at Sichuan University, Chengdu 610065, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chenghong","family":"Ao","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute at Sichuan University, Chengdu 610065, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jiangqi","family":"Zhao","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute at Sichuan University, Chengdu 610065, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Qunhao","family":"Wang","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute at Sichuan University, Chengdu 610065, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5778-9936","authenticated-orcid":false,"given":"Wei","family":"Zhang","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute at Sichuan University, Chengdu 610065, China"},{"name":"Advanced Polymer Materials Research Center of Sichuan University, Shishi 362700, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Canhui","family":"Lu","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute at Sichuan University, Chengdu 610065, China"},{"name":"Advanced Polymer Materials Research Center of Sichuan University, Shishi 362700, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2021,12,11]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"123604","DOI":"10.1016\/j.colsurfa.2019.123604","article-title":"Microwave assisted green synthesis of Zwitterionic photolumenescent N-doped carbon dots: An efficient \u2018on-off\u2019 chemosensor for tracer Cr(+6) considering the inner filter effect and nano drug-delivery vector","volume":"579","author":"Ganguly","year":"2019","journal-title":"Colloids Surf. A Physicochem. Eng. Asp."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"107611","DOI":"10.1016\/j.biotechadv.2020.107611","article-title":"Review: Remotely controlled magneto-regulation of therapeutics from magnetoelastic gel matrices","volume":"44","author":"Ganguly","year":"2020","journal-title":"Biotechnol. Adv."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1016\/j.watres.2015.06.004","article-title":"Heavy metal release due to aging effect during zero valent iron nanoparticles remediation","volume":"83","author":"Calderon","year":"2015","journal-title":"Water Res."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"372","DOI":"10.1016\/j.apsusc.2017.02.044","article-title":"Removal of Cr6+ from wastewater via adsorption with high-specific-surface-area nitro-gen-doped hierarchical porous carbon derived from silkworm cocoon","volume":"405","author":"Sun","year":"2017","journal-title":"Appl. Surf. Sci."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"1419","DOI":"10.1016\/j.carbpol.2016.11.025","article-title":"Grafting of polyethylenimine onto cellulose nanofibers for interfacial enhancement in their epoxy nanocomposites","volume":"157","author":"Zhao","year":"2016","journal-title":"Carbohydr. Polym."},{"key":"ref_6","doi-asserted-by":"crossref","unstructured":"Almutairi, F.M., El-Ghoul, Y., and Jabli, M. (2021). Extraction of Cellulose Polymeric Material from Populus tremula Fibers: Characterization and Application to the Adsorption of Methylene Blue and Crystal Violet. Polymers, 13.","DOI":"10.3390\/polym13193334"},{"key":"ref_7","doi-asserted-by":"crossref","unstructured":"Amaku, J.F., Nnaji, J.C., Ogundare, S.A., Akpomie, K.G., Ngwu, C.M., Chukwuemeka-Okorie, H.O., Zubairu, S.M., Ugwu, B.I., Odoemelam, S.A., and Conradie, J. (2021). Chrysophyllum albidum stem bark extract coated tillite adsorbent for the uptake of Cr(VI): Thermodynamic, kinetic, isotherm, and reusability. Biomass Convers. Biorefinery, 1\u201313.","DOI":"10.1007\/s13399-021-01489-8"},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"139944","DOI":"10.1016\/j.scitotenv.2020.139944","article-title":"Functionalized electrospun nanofiber membranes for water treatment: A review","volume":"739","author":"Chen","year":"2020","journal-title":"Sci. Total. Environ."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"1851","DOI":"10.1039\/C7EN00366H","article-title":"Layered silicate RUB-15 for efficient removal of UO22+ and heavy metal ions by ion-exchange","volume":"4","author":"Zhe","year":"2017","journal-title":"Environ. Sci. Nano"},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"104608","DOI":"10.1016\/j.jece.2020.104608","article-title":"Titania modified gum tragacanth based hydrogel nanocomposite for water remediation","volume":"9","author":"Sharma","year":"2020","journal-title":"J. Environ. Chem. Eng."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"111996","DOI":"10.1016\/j.jenvman.2021.111996","article-title":"Novel adsorptive PVC nanofibrous\/thiol-functionalized TNT composite UF membranes for effective dynamic removal of heavy metal ions","volume":"284","author":"Hezarjaribi","year":"2021","journal-title":"J. Environ. Manag."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"101339","DOI":"10.1016\/j.jwpe.2020.101339","article-title":"Removal of heavy metals from aqueous solution using carbon-based adsorbents: A review","volume":"37","author":"Duan","year":"2020","journal-title":"J. Water Process. Eng."},{"key":"ref_13","first-page":"377","article-title":"Removal of hexavalent chromium from aqueous solutions by adsorption on modified groundnut hull","volume":"5","author":"Owalude","year":"2016","journal-title":"Beni-Suef Univ. J. Basic Appl. Sci."},{"key":"ref_14","first-page":"419","article-title":"Chromium Interactions in CCA\/CCB Wood Preservatives. Part, I. Interactions with Wood Carbohydrates","volume":"44","author":"Pizzi","year":"1990","journal-title":"Holzforsch.\u2014Int. J. Biol. Chem. Phys. Technol. Wood"},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"102899","DOI":"10.1016\/j.jece.2019.102899","article-title":"Fluidized aerobic bio-reactor technology in treatment of textile effluent","volume":"7","author":"Singare","year":"2019","journal-title":"J. Environ. Chem. Eng."},{"key":"ref_16","first-page":"1","article-title":"Equilibrium adsorption study of the adsorptive removal of Cd 2+ and Cr 6+ using activated carbon","volume":"25","author":"Wang","year":"2018","journal-title":"Environ. Sci. Pollut. Res."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"111626","DOI":"10.1016\/j.envres.2021.111626","article-title":"Surface modified polymer-magnetic-algae nanocomposite for the removal of chromium- equilibrium and mechanism studies","volume":"201","author":"Sarojini","year":"2021","journal-title":"Environ. Res."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"21473","DOI":"10.1038\/s41598-020-78142-3","article-title":"Removal of aqueous Cr(VI) by magnetic biochar derived from bagasse","volume":"10","author":"Liang","year":"2020","journal-title":"Sci. Rep."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"111151","DOI":"10.1016\/j.envres.2021.111151","article-title":"Highly surface activated carbon to remove Cr(VI) from aqueous solution with adsorbent recycling","volume":"197","author":"Fang","year":"2021","journal-title":"Environ. Res."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"351","DOI":"10.1016\/j.biortech.2016.06.102","article-title":"Investigation of the adsorption-reduction mechanisms of hexavalent chromium by ramie biochars of different pyrolytic temperatures","volume":"218","author":"Zhou","year":"2016","journal-title":"Bioresour. Technol."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"459","DOI":"10.1016\/j.apt.2012.10.012","article-title":"Magnetic nanocomposites for environmental remediation","volume":"24","author":"Zhu","year":"2013","journal-title":"Adv. Powder Technol."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"550","DOI":"10.1016\/j.jhazmat.2019.02.063","article-title":"Removal of chromium (VI) from water by porous carbon derived from corn straw: Influencing factors, regeneration and mechanism","volume":"369","author":"Ma","year":"2019","journal-title":"J. Hazard. Mater."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"1859","DOI":"10.1007\/s10570-014-0255-x","article-title":"Mechanically robust, flame-retardant and anti-bacterial nanocomposite films comprised of cellulose nanofibrils and magnesium hydroxide nanoplatelets in a regenerated cellulose matrix","volume":"21","author":"Zhao","year":"2014","journal-title":"Cellulose"},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"1554","DOI":"10.1016\/j.ijbiomac.2021.05.119","article-title":"Cellulose nanocrystals: Pretreatments, preparation strategies, and surface functionalization","volume":"182","author":"Rana","year":"2021","journal-title":"Int. J. Biol. Macromol."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"79","DOI":"10.1016\/j.jhazmat.2017.03.002","article-title":"Stabilization of nanoscale zero-valent iron (nZVI) with modified biochar for Cr(VI) removal from aqueous solution","volume":"332","author":"Dong","year":"2017","journal-title":"J. Hazard. Mater."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"336","DOI":"10.1016\/j.chemosphere.2015.11.050","article-title":"Adsorption kinetics of magnetic biochar derived from peanut hull on removal of Cr (VI) from aqueous solution: Effects of production conditions and particle size","volume":"145","author":"Han","year":"2016","journal-title":"Chemosphere"},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"24","DOI":"10.1016\/j.cej.2014.05.038","article-title":"Carbothermal preparation of porous carbon-encapsulated iron composite for the removal of trace hexavalent chromium","volume":"253","author":"Zhuang","year":"2014","journal-title":"Chem. Eng. J."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"2919","DOI":"10.1016\/j.rinp.2017.08.011","article-title":"Ultra-lightweight and highly porous carbon aerogels from bamboo pulp fibers as an effective sorbent for water treatment","volume":"7","author":"Yuan","year":"2017","journal-title":"Results Phys."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"81","DOI":"10.1016\/j.cej.2011.11.006","article-title":"Cadmium removal and recovery from aqueous solutions by novel adsorbents prepared from orange peel and Fe2O3 nanoparticles","volume":"180","author":"Gupta","year":"2012","journal-title":"Chem. Eng. J."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"289","DOI":"10.1016\/j.envpol.2012.12.003","article-title":"Characterization and influence of biochars on nitrous oxide emission from agricultural soil","volume":"174C","author":"Wang","year":"2013","journal-title":"J. Environ. Pollut."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"1169","DOI":"10.1016\/j.fuel.2003.11.015","article-title":"Characterization of chars from pyrolysis of lignin","volume":"83","author":"Sharma","year":"2004","journal-title":"Fuel"},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"183","DOI":"10.1016\/j.bej.2013.06.009","article-title":"Carbon nanotubes promote Cr(VI) reduction by alginate-immobilized Shewanella oneidensis MR-1","volume":"77","author":"Yan","year":"2013","journal-title":"Biochem. Eng. J."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"127","DOI":"10.1016\/j.jhazmat.2015.04.032","article-title":"Novel fungus-Fe3O4 bio-nanocomposites as high performance adsorbents for the removal of radionuclides","volume":"295","author":"Ding","year":"2015","journal-title":"J. Hazard. Mater."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"289","DOI":"10.1016\/j.jtice.2016.09.012","article-title":"Chromium removal using magnetic biochar derived from herb-residue","volume":"68","author":"Shang","year":"2016","journal-title":"J. Taiwan Inst. Chem. Eng."},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"4371","DOI":"10.1021\/acssuschemeng.7b00418","article-title":"Magnetic Porous Carbonaceous Material Produced from Tea Waste for Efficient Removal of As(V), Cr(VI), Humic Acid, and Dyes","volume":"5","author":"Wen","year":"2017","journal-title":"ACS Sustain. Chem. Eng."},{"key":"ref_36","first-page":"399","article-title":"Nitrogen-Enriched Core-Shell Structured Fe\/Fe3 C\u2013C Nanorods as Advanced Electrocatalysts for Oxygen Reduction Reaction","volume":"24","author":"Wen","year":"2012","journal-title":"Adv. Mater."},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"25025","DOI":"10.1039\/C7RA03144K","article-title":"New insights on the dynamics of the \u03b3-Fe\/\u03b1-Fe phase-transition inside iron-filled carbon nanotubes","volume":"7","author":"Boi","year":"2017","journal-title":"Rsc Adv."},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"338","DOI":"10.1016\/j.carbon.2015.12.044","article-title":"Controllable synthesis of magnetic carbon composites with high porosity and strong acid resistance from hydrochar for efficient removal of organic pollutants: An overlooked influence","volume":"99","author":"Zhu","year":"2016","journal-title":"Carbon"},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"495","DOI":"10.1016\/j.jpowsour.2015.04.021","article-title":"Nitrogen doped carbon nanotubes with encapsulated ferric carbide as excellent electrocatalyst for oxygen reduction reaction in acid and alkaline media","volume":"286","author":"Zhong","year":"2015","journal-title":"J. Power Sources"},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"1353","DOI":"10.1080\/01932691.2010.505871","article-title":"Dynamic Column Adsorption Studies of Toxic Cr(VI) Ions onto Iron Oxide Loaded Gelatin Nanopar-ticles","volume":"32","author":"Agrawal","year":"2011","journal-title":"J. Dispers. Sci. Technol."},{"key":"ref_41","doi-asserted-by":"crossref","first-page":"47","DOI":"10.1016\/j.cis.2006.03.001","article-title":"Characterization of zero-valent iron nanoparticles","volume":"120","author":"Sun","year":"2006","journal-title":"Adv Colloid Interface"},{"key":"ref_42","doi-asserted-by":"crossref","first-page":"954","DOI":"10.1016\/j.mssp.2015.07.092","article-title":"Photocatalytic properties of fresh and pyrolyzed transparent nanocomposite films lay-er-by-layer fabricated from alternative layers of graphene and titanate nanotube","volume":"40","author":"Sun","year":"2015","journal-title":"Mater. Sci. Semicond. Process."},{"key":"ref_43","doi-asserted-by":"crossref","first-page":"19816","DOI":"10.1021\/am505170j","article-title":"Polyethylenimine Facilitated Ethyl Cellulose for Hexavalent Chromium Removal with a Wide pH Range","volume":"6","author":"Qiu","year":"2014","journal-title":"ACS Appl. Mater. Interfaces"},{"key":"ref_44","doi-asserted-by":"crossref","first-page":"9817","DOI":"10.1039\/C5TA01227A","article-title":"Cr(VI) removal by magnetic carbon nanocomposites derived from cellulose at different carboni-zation temperatures","volume":"3","author":"Qiu","year":"2015","journal-title":"J. Mater. Chem. A"},{"key":"ref_45","doi-asserted-by":"crossref","first-page":"2256","DOI":"10.1039\/C3TA13957C","article-title":"Mesoporous magnetic carbon nanocomposite fabrics for highly efficient Cr(VI) removal","volume":"2","author":"Zhu","year":"2014","journal-title":"J. Mater. Chem. A"},{"key":"ref_46","doi-asserted-by":"crossref","first-page":"1073","DOI":"10.1016\/j.jhazmat.2007.07.085","article-title":"Untreated coffee husks as biosorbents for the removal of heavy metals from aqueous solutions","volume":"152","author":"Oliveira","year":"2008","journal-title":"J. Hazard. Mater."},{"key":"ref_47","doi-asserted-by":"crossref","first-page":"4188","DOI":"10.1016\/j.watres.2012.10.056","article-title":"N-doped porous carbon with magnetic particles formed in situ for enhanced Cr(VI) removal","volume":"47","author":"Li","year":"2013","journal-title":"Water Res."},{"key":"ref_48","doi-asserted-by":"crossref","first-page":"868","DOI":"10.1016\/j.jhazmat.2016.10.006","article-title":"Synthesis of magnetic biochar from pine sawdust via oxidative hydrolysis of FeCl2 for the removal sulfamethoxazole from aqueous solution","volume":"321","author":"Reguyal","year":"2017","journal-title":"J. Hazard. Mater."},{"key":"ref_49","doi-asserted-by":"crossref","first-page":"17454","DOI":"10.1039\/C4TA04040F","article-title":"Cellulose derived magnetic mesoporous carbon nanocomposites with enhanced hexavalent chromium removal","volume":"2","author":"Qiu","year":"2014","journal-title":"J. Mater. Chem. A"},{"key":"ref_50","doi-asserted-by":"crossref","first-page":"63110","DOI":"10.1039\/C4RA10189H","article-title":"Efficient removal of a typical dye and Cr(VI) reduction using N-doped magnetic porous carbon","volume":"4","author":"Zhang","year":"2014","journal-title":"RSC Adv."}],"container-title":["Polymers"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2073-4360\/13\/24\/4338\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T07:45:30Z","timestamp":1760168730000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2073-4360\/13\/24\/4338"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2021,12,11]]},"references-count":50,"journal-issue":{"issue":"24","published-online":{"date-parts":[[2021,12]]}},"alternative-id":["polym13244338"],"URL":"https:\/\/doi.org\/10.3390\/polym13244338","relation":{},"ISSN":["2073-4360"],"issn-type":[{"value":"2073-4360","type":"electronic"}],"subject":[],"published":{"date-parts":[[2021,12,11]]}}}