Rogério J. M. Nascimento, Vinícius Taveira, Luiz Carlos Alves Bezerra, Felipe Bohn, Pierre B. A. Fechine, Francisco Avelino
{"title":"开发一种生产基于纳米磁铁矿的椰壳生物吸附剂的生态友好型综合方法:阐明罗丹明 B 和亚甲基蓝的吸附机理","authors":"Rogério J. M. Nascimento, Vinícius Taveira, Luiz Carlos Alves Bezerra, Felipe Bohn, Pierre B. A. Fechine, Francisco Avelino","doi":"10.1007/s13399-024-05869-8","DOIUrl":null,"url":null,"abstract":"<p>The present study focused on optimizing the biosorbent production through chemical modification of natural coconut fibers (NCFs) using a biorefinery process combined with nanoparticle impregnation and its adsorptive performance for removing Rhodamine B (Rh-B) and methylene blue. NCF was chemically modified via the formosolv process using formic acid (85% wt.) and 2% v/v HCl as catalyst at 100 °C for 1 h under atmospheric pressure, yielding formosolv coconut fiber (FCF). Nanomagnetic composites (NCF/Fe<sub>3</sub>O<sub>4</sub> and FCF/Fe<sub>3</sub>O<sub>4</sub>) were produced through wet co-precipitation by mixing FeSO<sub>4</sub>·7H<sub>2</sub>O and FeCl<sub>3</sub>·6H<sub>2</sub>O salts (1:2 mol/mol) in an alkaline medium at different concentrations. This process generated four biosorbents, such as NCF, FCF, NCF/Fe<sub>3</sub>O<sub>4</sub>, and FCF/Fe<sub>3</sub>O<sub>4</sub>, which were characterized by chemical composition, XRD, FTIR, and magnetic properties. (1) The biorefinery process caused a chemical modification in the fibers, increasing the cellulose content and the crystallinity indexes. (2) The formosolv process enhanced the iron incorporation. (3) FCF exhibited the highest Rh-B removal efficiencies (REs), approximately 98% for FCF and 74% for FCF/Fe<sub>3</sub>O<sub>4</sub>. (4) For MB, RE values were 98% for FCF and 93% for FCF/Fe<sub>3</sub>O<sub>4</sub>. (5) These biosorbents were produced via a simple, fast, and cost-effective methodology and showed great potential for adsorption purposes. (6) Isotherms revealed distinct behaviors for the dyes, indicating different interactions with adsorbents. (7) Rh-B fitted better to the Freundlich model, suggesting a physisorption mechanism, while MB showed better fitting to the Langmuir model, suggesting the occurrence of chemisorption. (8) Thermodynamic parameters indicated that the adsorption of both dyes was endothermic and spontaneous for all biosorbents. (10) Biorefinery-processed fibers exhibited higher enthalpy values, indicating stronger interaction with MB and Rh-B. (11) Regeneration studies suggested that a higher NaOH concentration enhanced the desorption efficiency. Overall, the proposed modification routes have demonstrated the capability to produce eco-friendly magnetic biosorbents with high adsorption potential through a simple, fast, and low-cost approach.</p>","PeriodicalId":488,"journal":{"name":"Biomass Conversion and Biorefinery","volume":null,"pages":null},"PeriodicalIF":3.5000,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Development of an integrated and eco-friendly approach for producing nanomagnetite-based coconut coir biosorbents: elucidation of the adsorption mechanism of Rhodamine B and methylene blue\",\"authors\":\"Rogério J. M. Nascimento, Vinícius Taveira, Luiz Carlos Alves Bezerra, Felipe Bohn, Pierre B. A. Fechine, Francisco Avelino\",\"doi\":\"10.1007/s13399-024-05869-8\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>The present study focused on optimizing the biosorbent production through chemical modification of natural coconut fibers (NCFs) using a biorefinery process combined with nanoparticle impregnation and its adsorptive performance for removing Rhodamine B (Rh-B) and methylene blue. NCF was chemically modified via the formosolv process using formic acid (85% wt.) and 2% v/v HCl as catalyst at 100 °C for 1 h under atmospheric pressure, yielding formosolv coconut fiber (FCF). Nanomagnetic composites (NCF/Fe<sub>3</sub>O<sub>4</sub> and FCF/Fe<sub>3</sub>O<sub>4</sub>) were produced through wet co-precipitation by mixing FeSO<sub>4</sub>·7H<sub>2</sub>O and FeCl<sub>3</sub>·6H<sub>2</sub>O salts (1:2 mol/mol) in an alkaline medium at different concentrations. This process generated four biosorbents, such as NCF, FCF, NCF/Fe<sub>3</sub>O<sub>4</sub>, and FCF/Fe<sub>3</sub>O<sub>4</sub>, which were characterized by chemical composition, XRD, FTIR, and magnetic properties. (1) The biorefinery process caused a chemical modification in the fibers, increasing the cellulose content and the crystallinity indexes. (2) The formosolv process enhanced the iron incorporation. (3) FCF exhibited the highest Rh-B removal efficiencies (REs), approximately 98% for FCF and 74% for FCF/Fe<sub>3</sub>O<sub>4</sub>. (4) For MB, RE values were 98% for FCF and 93% for FCF/Fe<sub>3</sub>O<sub>4</sub>. (5) These biosorbents were produced via a simple, fast, and cost-effective methodology and showed great potential for adsorption purposes. (6) Isotherms revealed distinct behaviors for the dyes, indicating different interactions with adsorbents. (7) Rh-B fitted better to the Freundlich model, suggesting a physisorption mechanism, while MB showed better fitting to the Langmuir model, suggesting the occurrence of chemisorption. (8) Thermodynamic parameters indicated that the adsorption of both dyes was endothermic and spontaneous for all biosorbents. (10) Biorefinery-processed fibers exhibited higher enthalpy values, indicating stronger interaction with MB and Rh-B. (11) Regeneration studies suggested that a higher NaOH concentration enhanced the desorption efficiency. Overall, the proposed modification routes have demonstrated the capability to produce eco-friendly magnetic biosorbents with high adsorption potential through a simple, fast, and low-cost approach.</p>\",\"PeriodicalId\":488,\"journal\":{\"name\":\"Biomass Conversion and Biorefinery\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":3.5000,\"publicationDate\":\"2024-07-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Biomass Conversion and Biorefinery\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://doi.org/10.1007/s13399-024-05869-8\",\"RegionNum\":4,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"ENERGY & FUELS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Biomass Conversion and Biorefinery","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1007/s13399-024-05869-8","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENERGY & FUELS","Score":null,"Total":0}
Development of an integrated and eco-friendly approach for producing nanomagnetite-based coconut coir biosorbents: elucidation of the adsorption mechanism of Rhodamine B and methylene blue
The present study focused on optimizing the biosorbent production through chemical modification of natural coconut fibers (NCFs) using a biorefinery process combined with nanoparticle impregnation and its adsorptive performance for removing Rhodamine B (Rh-B) and methylene blue. NCF was chemically modified via the formosolv process using formic acid (85% wt.) and 2% v/v HCl as catalyst at 100 °C for 1 h under atmospheric pressure, yielding formosolv coconut fiber (FCF). Nanomagnetic composites (NCF/Fe3O4 and FCF/Fe3O4) were produced through wet co-precipitation by mixing FeSO4·7H2O and FeCl3·6H2O salts (1:2 mol/mol) in an alkaline medium at different concentrations. This process generated four biosorbents, such as NCF, FCF, NCF/Fe3O4, and FCF/Fe3O4, which were characterized by chemical composition, XRD, FTIR, and magnetic properties. (1) The biorefinery process caused a chemical modification in the fibers, increasing the cellulose content and the crystallinity indexes. (2) The formosolv process enhanced the iron incorporation. (3) FCF exhibited the highest Rh-B removal efficiencies (REs), approximately 98% for FCF and 74% for FCF/Fe3O4. (4) For MB, RE values were 98% for FCF and 93% for FCF/Fe3O4. (5) These biosorbents were produced via a simple, fast, and cost-effective methodology and showed great potential for adsorption purposes. (6) Isotherms revealed distinct behaviors for the dyes, indicating different interactions with adsorbents. (7) Rh-B fitted better to the Freundlich model, suggesting a physisorption mechanism, while MB showed better fitting to the Langmuir model, suggesting the occurrence of chemisorption. (8) Thermodynamic parameters indicated that the adsorption of both dyes was endothermic and spontaneous for all biosorbents. (10) Biorefinery-processed fibers exhibited higher enthalpy values, indicating stronger interaction with MB and Rh-B. (11) Regeneration studies suggested that a higher NaOH concentration enhanced the desorption efficiency. Overall, the proposed modification routes have demonstrated the capability to produce eco-friendly magnetic biosorbents with high adsorption potential through a simple, fast, and low-cost approach.
期刊介绍:
Biomass Conversion and Biorefinery presents articles and information on research, development and applications in thermo-chemical conversion; physico-chemical conversion and bio-chemical conversion, including all necessary steps for the provision and preparation of the biomass as well as all possible downstream processing steps for the environmentally sound and economically viable provision of energy and chemical products.