From Waste to Resource: Utilizing Sweet Chestnut Waste to Produce Hydrothermal Carbon for Water Decontamination
Carbonaceous materials are a highly appealing class of adsorbents, owing to their exceptional properties, such as high surface area and thermal and chemical stability. These materials have found successful applications in water purification. Sweet chestnut (<i>Castanea sativa</i>) cupule...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-06-01
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| Series: | C |
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| Online Access: | https://www.mdpi.com/2311-5629/9/2/57 |
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| author | Silvia Izquierdo Nazaret Pacheco Carlos J. Durán-Valle Ignacio M. López-Coca |
| author_facet | Silvia Izquierdo Nazaret Pacheco Carlos J. Durán-Valle Ignacio M. López-Coca |
| author_sort | Silvia Izquierdo |
| collection | DOAJ |
| description | Carbonaceous materials are a highly appealing class of adsorbents, owing to their exceptional properties, such as high surface area and thermal and chemical stability. These materials have found successful applications in water purification. Sweet chestnut (<i>Castanea sativa</i>) cupules are disposed of as waste. Valorization of these residues is a step forward in terms of circular economy and sustainability. Meanwhile, per- and poly-fluoroalkyl substances (PFASs) pose significant concerns due to their persistence, bioaccumulation, and toxicity, emerging as contaminants of concern for human health and the environment. This study focuses on preparing carbonaceous material by hydrothermal carbonization from chestnut cupules, followed by their use as adsorbents for PFAS removal from polluted water. The cupule waste material was crushed, ground, sieved, and subjected to hydrothermal treatment at temperatures ranging from 180–200 °C to produce hydrothermal carbons. The adsorbents obtained were characterized by various techniques such as nitrogen adsorption isotherm, porosimetry, point of zero charge, Fourier-transform infrared, scanning electron microscopy, and thermal, elemental, and energy dispersive X-ray analyses. Surface area (S<sub>BET</sub>) values of 42.3–53.2 m<sup>2</sup>·g<sup>−1</sup> were obtained; pH<sub>PZC</sub> ranged from 3.8 to 4.8. This study also determined the adsorption kinetics and isotherms for removing perfluorooctanoate-contaminated water. The equilibrium was established at 72 h and <i>q<sub>e</sub></i> = 1029.47 mg·g<sup>−1</sup>. To summarize, this research successfully valorized a biomass residue by transforming it into hydrothermal carbon, which was then utilized as an adsorbent for water decontamination. |
| first_indexed | 2024-03-11T02:39:26Z |
| format | Article |
| id | doaj.art-14c85156e7d9446fa4cab0d23313dd24 |
| institution | Directory Open Access Journal |
| issn | 2311-5629 |
| language | English |
| last_indexed | 2024-03-11T02:39:26Z |
| publishDate | 2023-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | C |
| spelling | doaj.art-14c85156e7d9446fa4cab0d23313dd242023-11-18T09:41:04ZengMDPI AGC2311-56292023-06-01925710.3390/c9020057From Waste to Resource: Utilizing Sweet Chestnut Waste to Produce Hydrothermal Carbon for Water DecontaminationSilvia Izquierdo0Nazaret Pacheco1Carlos J. Durán-Valle2Ignacio M. López-Coca3Environmental and Sustainable Chemistry Research Group, School of Technology, University of Extremadura, 10003 Cáceres, SpainEnvironmental and Sustainable Chemistry Research Group, School of Technology, University of Extremadura, 10003 Cáceres, SpainEnvironmental and Sustainable Chemistry Research Group, IACYS, Faculty of Sciences, University of Extremadura, 06006 Badajoz, SpainEnvironmental and Sustainable Chemistry Research Group, INTERRA, School of Technology, University of Extremadura, 10003 Cáceres, SpainCarbonaceous materials are a highly appealing class of adsorbents, owing to their exceptional properties, such as high surface area and thermal and chemical stability. These materials have found successful applications in water purification. Sweet chestnut (<i>Castanea sativa</i>) cupules are disposed of as waste. Valorization of these residues is a step forward in terms of circular economy and sustainability. Meanwhile, per- and poly-fluoroalkyl substances (PFASs) pose significant concerns due to their persistence, bioaccumulation, and toxicity, emerging as contaminants of concern for human health and the environment. This study focuses on preparing carbonaceous material by hydrothermal carbonization from chestnut cupules, followed by their use as adsorbents for PFAS removal from polluted water. The cupule waste material was crushed, ground, sieved, and subjected to hydrothermal treatment at temperatures ranging from 180–200 °C to produce hydrothermal carbons. The adsorbents obtained were characterized by various techniques such as nitrogen adsorption isotherm, porosimetry, point of zero charge, Fourier-transform infrared, scanning electron microscopy, and thermal, elemental, and energy dispersive X-ray analyses. Surface area (S<sub>BET</sub>) values of 42.3–53.2 m<sup>2</sup>·g<sup>−1</sup> were obtained; pH<sub>PZC</sub> ranged from 3.8 to 4.8. This study also determined the adsorption kinetics and isotherms for removing perfluorooctanoate-contaminated water. The equilibrium was established at 72 h and <i>q<sub>e</sub></i> = 1029.47 mg·g<sup>−1</sup>. To summarize, this research successfully valorized a biomass residue by transforming it into hydrothermal carbon, which was then utilized as an adsorbent for water decontamination.https://www.mdpi.com/2311-5629/9/2/57carbonaceous materialbiocharhydrothermal carbon<i>Castanea sativa</i>biomass residuesresidue valorization |
| spellingShingle | Silvia Izquierdo Nazaret Pacheco Carlos J. Durán-Valle Ignacio M. López-Coca From Waste to Resource: Utilizing Sweet Chestnut Waste to Produce Hydrothermal Carbon for Water Decontamination C carbonaceous material biochar hydrothermal carbon <i>Castanea sativa</i> biomass residues residue valorization |
| title | From Waste to Resource: Utilizing Sweet Chestnut Waste to Produce Hydrothermal Carbon for Water Decontamination |
| title_full | From Waste to Resource: Utilizing Sweet Chestnut Waste to Produce Hydrothermal Carbon for Water Decontamination |
| title_fullStr | From Waste to Resource: Utilizing Sweet Chestnut Waste to Produce Hydrothermal Carbon for Water Decontamination |
| title_full_unstemmed | From Waste to Resource: Utilizing Sweet Chestnut Waste to Produce Hydrothermal Carbon for Water Decontamination |
| title_short | From Waste to Resource: Utilizing Sweet Chestnut Waste to Produce Hydrothermal Carbon for Water Decontamination |
| title_sort | from waste to resource utilizing sweet chestnut waste to produce hydrothermal carbon for water decontamination |
| topic | carbonaceous material biochar hydrothermal carbon <i>Castanea sativa</i> biomass residues residue valorization |
| url | https://www.mdpi.com/2311-5629/9/2/57 |
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