Francisco J. Cano, Rocío Sánchez−Albores, A. Ashok, J. Escorcia−García, A. Cruz−Salomón, Odín Reyes−Vallejo, P. J. Sebastian, S. Velumani
{"title":"番木瓜籽衍生的功能化生物炭：一种环保高效的染料吸附替代品","authors":"Francisco J. Cano, Rocío Sánchez−Albores, A. Ashok, J. Escorcia−García, A. Cruz−Salomón, Odín Reyes−Vallejo, P. J. Sebastian, S. Velumani","doi":"10.1007/s10854-025-14725-y","DOIUrl":null,"url":null,"abstract":"<div><p>Biochar is emerging as a sustainable material for addressing critical environmental challenges, including water pollution and carbon sequestration. In this study, biochar derived from <i>papaya seed</i> biomass via slow pyrolysis was investigated for its efficacy in removing organic dyes from aqueous solutions. Both biochar and chemically functionalized biochar were comprehensively characterized using XRD, FTIR, XPS, BET surface area analysis, and SEM/EDS to elucidate their structural, morphological, and surface properties. The adsorption performance was assessed using methylene blue (MB), rhodamine B (RhB), malachite green (MG), and methyl orange (MO) as model contaminants, with particular attention to adsorption kinetics and equilibrium behavior. The unmodified biochar exhibited moderate adsorption capacities, primarily driven by π − π interactions and a limited number of functional groups, achieving removal efficiencies of 55.5, 97.8, and 12.9% for MB, MG, and RhB, respectively, while MO showed negligible adsorption. Remarkably, chemical functionalization with KMnO₄ significantly enhanced biochar performance, increasing surface area and functional group diversity. This modification enabled the complete removal (100%) of MB and MG within six minutes, alongside substantial improvements for RhB and MO, achieving 100 and 88% removal, respectively. Adsorption kinetics followed a pseudo‒second‒order model (<i>R</i><sup>2</sup> > 0.99), indicating chemisorption as the dominant mechanism, while Langmuir isotherms (<i>R</i><sup>2</sup> = 0.993 − 0.999) suggested monolayer adsorption. Additionally, the intraparticle diffusion model highlighted the synergistic contributions of surface interactions and pore diffusion to overall adsorption efficiency. These findings establish chemically functionalized papaya seed biochar as a highly efficient, low‒cost adsorbent for dye removal, underscoring its potential for environmental remediation. The innovative utilization of papaya seed biomass not only adds value to agricultural waste but also advances sustainable water treatment strategies, reinforcing its significance in environmental science and engineering.</p></div>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":"36 11","pages":""},"PeriodicalIF":2.8000,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10854-025-14725-y.pdf","citationCount":"0","resultStr":"{\"title\":\"Carica papaya seed− derived functionalized biochar: an environmentally friendly and efficient alternative for dye adsorption\",\"authors\":\"Francisco J. Cano, Rocío Sánchez−Albores, A. Ashok, J. Escorcia−García, A. Cruz−Salomón, Odín Reyes−Vallejo, P. J. Sebastian, S. Velumani\",\"doi\":\"10.1007/s10854-025-14725-y\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Biochar is emerging as a sustainable material for addressing critical environmental challenges, including water pollution and carbon sequestration. In this study, biochar derived from <i>papaya seed</i> biomass via slow pyrolysis was investigated for its efficacy in removing organic dyes from aqueous solutions. Both biochar and chemically functionalized biochar were comprehensively characterized using XRD, FTIR, XPS, BET surface area analysis, and SEM/EDS to elucidate their structural, morphological, and surface properties. The adsorption performance was assessed using methylene blue (MB), rhodamine B (RhB), malachite green (MG), and methyl orange (MO) as model contaminants, with particular attention to adsorption kinetics and equilibrium behavior. The unmodified biochar exhibited moderate adsorption capacities, primarily driven by π − π interactions and a limited number of functional groups, achieving removal efficiencies of 55.5, 97.8, and 12.9% for MB, MG, and RhB, respectively, while MO showed negligible adsorption. Remarkably, chemical functionalization with KMnO₄ significantly enhanced biochar performance, increasing surface area and functional group diversity. This modification enabled the complete removal (100%) of MB and MG within six minutes, alongside substantial improvements for RhB and MO, achieving 100 and 88% removal, respectively. Adsorption kinetics followed a pseudo‒second‒order model (<i>R</i><sup>2</sup> > 0.99), indicating chemisorption as the dominant mechanism, while Langmuir isotherms (<i>R</i><sup>2</sup> = 0.993 − 0.999) suggested monolayer adsorption. Additionally, the intraparticle diffusion model highlighted the synergistic contributions of surface interactions and pore diffusion to overall adsorption efficiency. These findings establish chemically functionalized papaya seed biochar as a highly efficient, low‒cost adsorbent for dye removal, underscoring its potential for environmental remediation. 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Carica papaya seed− derived functionalized biochar: an environmentally friendly and efficient alternative for dye adsorption
Biochar is emerging as a sustainable material for addressing critical environmental challenges, including water pollution and carbon sequestration. In this study, biochar derived from papaya seed biomass via slow pyrolysis was investigated for its efficacy in removing organic dyes from aqueous solutions. Both biochar and chemically functionalized biochar were comprehensively characterized using XRD, FTIR, XPS, BET surface area analysis, and SEM/EDS to elucidate their structural, morphological, and surface properties. The adsorption performance was assessed using methylene blue (MB), rhodamine B (RhB), malachite green (MG), and methyl orange (MO) as model contaminants, with particular attention to adsorption kinetics and equilibrium behavior. The unmodified biochar exhibited moderate adsorption capacities, primarily driven by π − π interactions and a limited number of functional groups, achieving removal efficiencies of 55.5, 97.8, and 12.9% for MB, MG, and RhB, respectively, while MO showed negligible adsorption. Remarkably, chemical functionalization with KMnO₄ significantly enhanced biochar performance, increasing surface area and functional group diversity. This modification enabled the complete removal (100%) of MB and MG within six minutes, alongside substantial improvements for RhB and MO, achieving 100 and 88% removal, respectively. Adsorption kinetics followed a pseudo‒second‒order model (R2 > 0.99), indicating chemisorption as the dominant mechanism, while Langmuir isotherms (R2 = 0.993 − 0.999) suggested monolayer adsorption. Additionally, the intraparticle diffusion model highlighted the synergistic contributions of surface interactions and pore diffusion to overall adsorption efficiency. These findings establish chemically functionalized papaya seed biochar as a highly efficient, low‒cost adsorbent for dye removal, underscoring its potential for environmental remediation. The innovative utilization of papaya seed biomass not only adds value to agricultural waste but also advances sustainable water treatment strategies, reinforcing its significance in environmental science and engineering.
期刊介绍：
The Journal of Materials Science: Materials in Electronics is an established refereed companion to the Journal of Materials Science. It publishes papers on materials and their applications in modern electronics, covering the ground between fundamental science, such as semiconductor physics, and work concerned specifically with applications. It explores the growth and preparation of new materials, as well as their processing, fabrication, bonding and encapsulation, together with the reliability, failure analysis, quality assurance and characterization related to the whole range of applications in electronics. The Journal presents papers in newly developing fields such as low dimensional structures and devices, optoelectronics including III-V compounds, glasses and linear/non-linear crystal materials and lasers, high Tc superconductors, conducting polymers, thick film materials and new contact technologies, as well as the established electronics device and circuit materials.
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