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Biomass Conversion and Biorefinery

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29.01.2022 | Original Article

Synthesis, characterization, and methylene blue adsorption isotherms of hydrochars derived from forestry waste and agro-residues

verfasst von: Xian Zhang, Fangyuan Chen, Shiwang Liu, Jian Lou, Wanpeng Liu, Diederik P. L. Rousseau, Stijn Van Hulle

Erschienen in: Biomass Conversion and Biorefinery | Ausgabe 2/2024

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Abstract

Mason pine-derived hydrochar (MPHC), cedarwood-derived hydrochar (CHC), bamboo-derived hydrochar (BHC), coconut shell-derived hydrochar (CSHC), pecan shell-derived hydrochar (PSHC), wheat straw-derived hydrochar (WSHC), maize straw-derived hydrochar (MSHC), and rice straw-derived hydrochar (RSHC) were synthesized by hydrothermal carbonization (HTC). The physicochemical properties of these hydrochars were characterized by various techniques, and the adsorption behavior of methylene blue (MB) on hydrochars from an aqueous solution was also investigated. The characterization results suggested that the hydrochars possessed various oxygen-containing functional groups (e.g., ether and hydroxyl groups, etc.). Thermodynamic parameters demonstrated that adsorption was spontaneous for all produced hydrochars. The adsorption was endothermic for CHC, BHC, CSHC, PSHC, WSHC, MSHC, RSHC, and exothermic for MPHC. The Langmuir model best described the adsorption process. MB adsorption capacity is ranked as MPHC > PSHC > CSHC > CHC > MSHC> WSHC > RSHC > BHC. The saturated adsorption value for MB on these hydrochars at 15 ℃ was 155.14, 109.24, 93.15, 91.71, 88.11, 86.36, 70.01, and 64.43 mg/g, respectively; the difference in adsorption value indicates that the type of biomass affects MB adsorption. This high adsorption capacity for MB suggests that the produced hydrochars could be utilized as a promising new adsorbent in wastewater treatment.

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Vorheriger Artikel Degradation of newly developed date palm agro-residues-filled polyethylene biocomposites in the planktonic and benthic zones of a marine environment

Nächster Artikel Biosorption of Basic Red 46 using raw cactus fruit peels: equilibrium, kinetic and thermodynamic studies

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Titel: Synthesis, characterization, and methylene blue adsorption isotherms of hydrochars derived from forestry waste and agro-residues
verfasst von: Xian Zhang
Fangyuan Chen
Shiwang Liu
Jian Lou
Wanpeng Liu
Diederik P. L. Rousseau
Stijn Van Hulle
Publikationsdatum: 29.01.2022
Verlag: Springer Berlin Heidelberg
Erschienen in: Biomass Conversion and Biorefinery / Ausgabe 2/2024
Print ISSN: 2190-6815
Elektronische ISSN: 2190-6823
DOI: https://doi.org/10.1007/s13399-021-02241-y

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Abstract

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