Production and Characterization of Activated Biochar of Cássia Fistula L. Leaves

Tomassoni, Fabíola; Schneider, Elisângela Edila; Giroletti, Cristiane Lisboa; Hassemer, Maria Eliza Nagel; Recio, Marı́a Ángeles Lobo; Lapolli, Flávio Rubens

doi:10.19177/rgsa.v9e02020800-815

Cited by 2 publications

(1 citation statement)

References 26 publications

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“…The tested adsorbents are amorphous due to their lignocellulosic structure confirmed by broad peaks from 10° to 30° for CBS and from 15° to 30° for BCC and BACB, attributed to the lignin content (Meili et al 2019a(Meili et al , 2019b. The peaks that appear around 40° to 50° for BCC and BACB correspond to reflections of the disordered micrographic structure, which are characteristic of activated carbon representing the inorganic phase (Tomassoni et al 2020).…”

Section: Characteristics Of Cbs Bcc and Bacbmentioning

confidence: 97%

Adsorption of atrazine and 2,4-D pesticides on alternative biochars from cedar bark sawdust (Cedrella fissilis)

Hernandes

Franco

Georgin

et al. 2021

Environ Sci Pollut Res

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Bark residues of the forest species Cedrela fissilis were physically and chemically modified with zinc chloride (ZnCl 2 ) as an activating agent. The two modified materials were analyzed as adsorbents in removing atrazine and 2,4-D herbicides from effluents. Firstly, the precursor material and the modified ones were characterized by different techniques to identify the structural changes that occurred in the surfaces. Through TGA, it was observed that both modified materials have thermal stability close to each other and are highly superior to the precursor. X-ray diffractions proved that the amorphous structure was not altered, the three materials being highly heterogeneous and irregular. The micrographs showed that the treatments brought new spaces and cavities on the surface, especially for the material carbonized with ZnCl 2 . The pH PZC of the modified materials was close to 7.5. The physically modified material had a surface area of 47.31 m 2 g −1 and pore volume of 0.0095 cm 3 g −1 , whereas the carbonized material had a surface area of 98.12 m 2 g −1 and pore volume of 0.0099 cm 3 g −1 . Initial tests indicated that none of the adsorbents were efficient in removing 2,4-D. However, they showed good potential for removing atrazine. The Koble-Corrigan isothermal model best fits the experimental data, with a maximum capacity of 3.44 mg g −1 and 2.70 mg g −1 for physically modified and with ZnCl 2 , respectively. The kinetic studies showed that the system tends to enter into equilibrium after 120 min, presenting good statistical indicators to the linear driving force model (LDF). The surface diffusion coefficients were 2.18×10 −9 and 2.37×10 −9 cm 2 s −1 for atrazine adsorption on the physically and chemically modified materials. These results showed that the application of residues from the processing of cedar bark is promising. However, new future studies must be carried out to improve the porous development of the material and obtain greater adsorption capacities.

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Section: Characteristics Of Cbs Bcc and Bacbmentioning

confidence: 97%

Adsorption of atrazine and 2,4-D pesticides on alternative biochars from cedar bark sawdust (Cedrella fissilis)

Hernandes

Franco

Georgin

et al. 2021

Environ Sci Pollut Res

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Comparative Analysis of Characteristics Based on Three Processes of Kenaf Solid Fuel: Hydrothermal Carbonization, Torrefaction, and Low Ash Torrefaction

Youn,

Kim,

2024

Korean J. Chem. Eng.

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This study conducted three processes-hydrothermal carbonization (HTC), torrefaction (TOR) and ash removal, and low ash TOR (LA_TOR)-to compare the characteristics of kenaf-based solid fuel under different production processes. To produce solid fuels, the ash removal process was conducted at 50 °C for 60 min in an autoclave, followed by HTC or TOR at various temperatures (160, 200, 240, 280, and 320 °C) for 60 min. The chemical compositions and fuel properties of the resulting products were then analyzed and compared. The study found that under HTC at 320 °C, the product had the highest carbon content compared with the products from TOR and LA_TOR at 320 °C. Thus, out of the three methods, HTC produced the highest quality solid fuel. However, this process exhibited a low energy yield and large energy loss. In contrast, LA_TOR showed a high energy yield and low energy loss, and effectively reduced the ash content of the product, demonstrating its suitability for industrial-scale applications that require fuel with LA content and energy loss.

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Production and Characterization of Activated Biochar of Cássia Fistula L. Leaves

Cited by 2 publications

References 26 publications

Adsorption of atrazine and 2,4-D pesticides on alternative biochars from cedar bark sawdust (Cedrella fissilis)

Adsorption of atrazine and 2,4-D pesticides on alternative biochars from cedar bark sawdust (Cedrella fissilis)

Comparative Analysis of Characteristics Based on Three Processes of Kenaf Solid Fuel: Hydrothermal Carbonization, Torrefaction, and Low Ash Torrefaction

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