Optimization of synthesis conditions of hydrochar and pyrohydrochar from fish bones for their use in the adsorption of fluoride from water
In this study, the optimization of the synthesis variables of hydrochar (HC) and pyrohydrochar (PHC) obtained from pleco fish spines that would generate the highest fluoride adsorption capacity and synthesis yield was carried out. For this purpose, a D-Optimal experimental composite central design w...
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Elsevier
2024-12-01
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| Series: | Sustainable Chemistry for the Environment |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2949839224001020 |
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| author | Sergio Armando Cruz Briano Nahum Andrés Medellín Castillo Juan Carlos Moreno Piraján Liliana Giraldo Gutiérrez Guillermo Javier Castro Larragoitia Pablo Delgado Sánchez Alfredo Israel Flores Rojas Hilda Guadalupe Cisneros Ontiveros |
| author_facet | Sergio Armando Cruz Briano Nahum Andrés Medellín Castillo Juan Carlos Moreno Piraján Liliana Giraldo Gutiérrez Guillermo Javier Castro Larragoitia Pablo Delgado Sánchez Alfredo Israel Flores Rojas Hilda Guadalupe Cisneros Ontiveros |
| author_sort | Sergio Armando Cruz Briano |
| collection | DOAJ |
| description | In this study, the optimization of the synthesis variables of hydrochar (HC) and pyrohydrochar (PHC) obtained from pleco fish spines that would generate the highest fluoride adsorption capacity and synthesis yield was carried out. For this purpose, a D-Optimal experimental composite central design was established using response surface methodology (RSM) considering three levels for temperature and synthesis time. Hydrochar was produced by hydrothermal carbonization at temperatures of 180–240 °C for 4–8 h in the presence of water under autogenous pressure. On the other hand, pyrohydrochar was obtained by pyrolysis of hydrochar in the absence of water at temperatures of 350–650 °C for 1–2 h at autogenous pressures (2–20 MPa). The results of the D-Optimal design indicated that the materials synthesized at lower temperatures and times, particularly at 180 °C - 4 h (HC1) and 350 °C - 1.5 h (PHC5), achieved the highest adsorption yield and capacity, with values of 87.9 % and 5.27 mg g−1; and 94.8 % and 5.73 mg g−1 for HC1 and PHC5, respectively. Analysis of variance (ANOVA) on the synthesis model revealed that temperature and carbonization time are significant factors, both factors have an influence on HC and PHC fluoride adsorption capacity and HC yield and only temperature affects PHC yield. The optimum synthesis conditions to obtain the highest yields were 180 °C for 4 h and 350 °C for 1 h for HC and PHC, respectively, with 88.4 % and 96.2 % values. As for the maximum adsorption capacity, the optimum temperature and time values were 185 °C for 4 h and 378 °C for 1 h for HC and PHC, respectively, reaching adsorption capacities of 5.27 mg g−1 and 5.64 mg g−1. In addition, HC1 and PHC5 materials were characterized by N2 physisorption, Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), CHNS elemental analysis and scanning electron microscopy (SEM). These materials showed differences among themselves, where the higher specific area of PCH5 with 137 m2 g−1, with respect to HC1 with 119 m2 g−1, stands out, as well as a higher concentration of basic sites, being 1.65 and 1.40 meq g−1 for HC1 and PHC5, respectively, on the other hand, the FTIR showed the same functional groups present on the surface, although in the SEM it was observed that the surface of HC1 presented small fractures, which disappeared when subjected to the pyrolysis process, in addition, the TGA showed a greater amount of organic matter in HC1 that could affect the adsorption of fluorides. The effect of pH on the adsorption capacity of HC1 and PHC5 fluorides was also investigated, revealing an increase of this capacity with decreasing solution pH due to electrostatic forces. |
| format | Article |
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| institution | Kabale University |
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| language | English |
| publishDate | 2024-12-01 |
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| series | Sustainable Chemistry for the Environment |
| spelling | doaj-art-f7cb92c02ab64691a9e2e35b0e7db5f92024-12-09T04:28:53ZengElsevierSustainable Chemistry for the Environment2949-83922024-12-018100159Optimization of synthesis conditions of hydrochar and pyrohydrochar from fish bones for their use in the adsorption of fluoride from waterSergio Armando Cruz Briano0Nahum Andrés Medellín Castillo1Juan Carlos Moreno Piraján2Liliana Giraldo Gutiérrez3Guillermo Javier Castro Larragoitia4Pablo Delgado Sánchez5Alfredo Israel Flores Rojas6Hilda Guadalupe Cisneros Ontiveros7Programa Multidisciplinario en Ciencias Ambientales, Universidad Autónoma de San Luis Potosí, Zona Universitaria S.L.P., Av. Dr. M Nava No. 221 78290, Mexico; Corresponding author.Programa Multidisciplinario en Ciencias Ambientales, Universidad Autónoma de San Luis Potosí, Zona Universitaria S.L.P., Av. Dr. M Nava No. 221 78290, Mexico; Centro de Investigación y Estudios de Posgrado, Facultad de Ingeniería, Universidad Autónoma de San Luis Potosí, Zona Universitaria S.L.P., Av. Dr. M Nava No. 8, 78290, Mexico; Corresponding author at: Programa Multidisciplinario en Ciencias Ambientales, Universidad Autónoma de San Luis Potosí, Zona Universitaria S.L.P., Av. Dr. M Nava No. 221 78290, Mexico.Grupo de investigación en Solidos Porosos y calorimetría. Dpto. de Química, Universidad de los Andes, Bogotá, ColombiaDepartamento de Química, Facultad de Ciencias, Universidad Nacional de Colombia, Bogotá, ColombiaPrograma Multidisciplinario en Ciencias Ambientales, Universidad Autónoma de San Luis Potosí, Zona Universitaria S.L.P., Av. Dr. M Nava No. 221 78290, MexicoFacultad de Agronomía, Universidad Autónoma de San Luis Potosí, Soledad de Graciano Sánchez, Km. 14.5 Carr. San Luis - Matehuala Palma de la Cruz, S.L.P. 78321, MexicoCentro de Investigación y Estudios de Posgrado, Facultad de Ingeniería, Universidad Autónoma de San Luis Potosí, Zona Universitaria S.L.P., Av. Dr. M Nava No. 8, 78290, MexicoPrograma Multidisciplinario en Ciencias Ambientales, Universidad Autónoma de San Luis Potosí, Zona Universitaria S.L.P., Av. Dr. M Nava No. 221 78290, MexicoIn this study, the optimization of the synthesis variables of hydrochar (HC) and pyrohydrochar (PHC) obtained from pleco fish spines that would generate the highest fluoride adsorption capacity and synthesis yield was carried out. For this purpose, a D-Optimal experimental composite central design was established using response surface methodology (RSM) considering three levels for temperature and synthesis time. Hydrochar was produced by hydrothermal carbonization at temperatures of 180–240 °C for 4–8 h in the presence of water under autogenous pressure. On the other hand, pyrohydrochar was obtained by pyrolysis of hydrochar in the absence of water at temperatures of 350–650 °C for 1–2 h at autogenous pressures (2–20 MPa). The results of the D-Optimal design indicated that the materials synthesized at lower temperatures and times, particularly at 180 °C - 4 h (HC1) and 350 °C - 1.5 h (PHC5), achieved the highest adsorption yield and capacity, with values of 87.9 % and 5.27 mg g−1; and 94.8 % and 5.73 mg g−1 for HC1 and PHC5, respectively. Analysis of variance (ANOVA) on the synthesis model revealed that temperature and carbonization time are significant factors, both factors have an influence on HC and PHC fluoride adsorption capacity and HC yield and only temperature affects PHC yield. The optimum synthesis conditions to obtain the highest yields were 180 °C for 4 h and 350 °C for 1 h for HC and PHC, respectively, with 88.4 % and 96.2 % values. As for the maximum adsorption capacity, the optimum temperature and time values were 185 °C for 4 h and 378 °C for 1 h for HC and PHC, respectively, reaching adsorption capacities of 5.27 mg g−1 and 5.64 mg g−1. In addition, HC1 and PHC5 materials were characterized by N2 physisorption, Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), CHNS elemental analysis and scanning electron microscopy (SEM). These materials showed differences among themselves, where the higher specific area of PCH5 with 137 m2 g−1, with respect to HC1 with 119 m2 g−1, stands out, as well as a higher concentration of basic sites, being 1.65 and 1.40 meq g−1 for HC1 and PHC5, respectively, on the other hand, the FTIR showed the same functional groups present on the surface, although in the SEM it was observed that the surface of HC1 presented small fractures, which disappeared when subjected to the pyrolysis process, in addition, the TGA showed a greater amount of organic matter in HC1 that could affect the adsorption of fluorides. The effect of pH on the adsorption capacity of HC1 and PHC5 fluorides was also investigated, revealing an increase of this capacity with decreasing solution pH due to electrostatic forces.http://www.sciencedirect.com/science/article/pii/S2949839224001020AdsorptionOptimizationHydrocharPyrohydrocharFluoride |
| spellingShingle | Sergio Armando Cruz Briano Nahum Andrés Medellín Castillo Juan Carlos Moreno Piraján Liliana Giraldo Gutiérrez Guillermo Javier Castro Larragoitia Pablo Delgado Sánchez Alfredo Israel Flores Rojas Hilda Guadalupe Cisneros Ontiveros Optimization of synthesis conditions of hydrochar and pyrohydrochar from fish bones for their use in the adsorption of fluoride from water Sustainable Chemistry for the Environment Adsorption Optimization Hydrochar Pyrohydrochar Fluoride |
| title | Optimization of synthesis conditions of hydrochar and pyrohydrochar from fish bones for their use in the adsorption of fluoride from water |
| title_full | Optimization of synthesis conditions of hydrochar and pyrohydrochar from fish bones for their use in the adsorption of fluoride from water |
| title_fullStr | Optimization of synthesis conditions of hydrochar and pyrohydrochar from fish bones for their use in the adsorption of fluoride from water |
| title_full_unstemmed | Optimization of synthesis conditions of hydrochar and pyrohydrochar from fish bones for their use in the adsorption of fluoride from water |
| title_short | Optimization of synthesis conditions of hydrochar and pyrohydrochar from fish bones for their use in the adsorption of fluoride from water |
| title_sort | optimization of synthesis conditions of hydrochar and pyrohydrochar from fish bones for their use in the adsorption of fluoride from water |
| topic | Adsorption Optimization Hydrochar Pyrohydrochar Fluoride |
| url | http://www.sciencedirect.com/science/article/pii/S2949839224001020 |
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