Biogenic nanoporous oxides recovery from by-products of bioenergy production: Rice husks and corncob biochars

Gómez-Vásquez, Rafael D.; Fernández-Ballesteros, E.; Camargo-Trillos, Diego A.

doi:10.1016/j.biombioe.2022.106455

Cited by 10 publications

(4 citation statements)

References 51 publications

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“…The results are shown in Table 4, where it can be observed the presence of elements such as K, P, and Si, which are in a higher proportion in the BCM biochar when compared with corn cobs. The amount of K increases considerably by the pyrolysis process, being the main element in BCM with a concentration greater than 11%, similar to that reported by Gómez-Vásquez et al (2022) [36]. The high amount of elements was attributed to the fertilizer used for plant growth (Land and Water Division, FAO, 2002) since the main elemental composition is K, P, and Si with concentrations greater than 0.6% [37].…”

Section: Inorganic Compositionsupporting

confidence: 76%

“…In Figure 4, an intense signal at 29.29 • due to silicon oxide (SiO 2 ) with crystallographic chart 96-900-0809 can be observed. Since SiO 2 is a compound that is prominent in the inorganic components of corn cob [36], or it may belong to a potassium mineral (K) with crystallographic chart 96-901-1978, these elements can be found in biochar due to the inorganic elements present in the biomass that was not carbonized. The signals for amorphous graphite were also observed at signals between 20 and 30 • and 40 and 50 • .…”

Section: Structure Of Modified Biocharmentioning

confidence: 99%

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Magnetic Biochar Obtained by Chemical Coprecipitation and Pyrolysis of Corn Cob Residues: Characterization and Methylene Blue Adsorption

et al. 2023

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Biochar is a carbonaceous and porous material with limited adsorption capacity, which increases by modifying its surface. Many of the biochars modified with magnetic nanoparticles reported previously were obtained in two steps: first, the biomass was pyrolyzed, and then the modification was performed. In this research, a biochar with Fe3O4 particles was obtained during the pyrolysis process. Corn cob residues were used to obtain the biochar (i.e., BCM) and the magnetic one (i.e., BCMFe). The BCMFe biochar was synthesized by a chemical coprecipitation technique prior to the pyrolysis process. The biochars obtained were characterized to determine their physicochemical, surface, and structural properties. The characterization revealed a porous surface with a 1013.52 m2/g area for BCM and 903.67 m2/g for BCMFe. The pores were uniformly distributed, as observed in SEM images. BCMFe showed Fe3O4 particles on the surface with a spherical shape and a uniform distribution. According to FTIR analysis, the functional groups formed on the surface were aliphatic and carbonyl functional groups. Ash content in the biochar was 4.0% in BCM and 8.0% in BCMFe; the difference corresponded to the presence of inorganic elements. The TGA showed that BCM lost 93.8 wt% while BCMFe was more thermally stable due to the inorganic species on the biochar surface, with a weight loss of 78.6%. Both biochars were tested as adsorbent materials for methylene blue. BCM and BCMFe obtained a maximum adsorption capacity (qm) of 23.17 mg/g and 39.66 mg/g, respectively. The obtained biochars are promising materials for the efficient removal of organic pollutants.

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Section: Inorganic Compositionsupporting

confidence: 76%

Section: Structure Of Modified Biocharmentioning

confidence: 99%

Magnetic Biochar Obtained by Chemical Coprecipitation and Pyrolysis of Corn Cob Residues: Characterization and Methylene Blue Adsorption

et al. 2023

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“…Biochar can be synthesized by the pyrolysis process (300 °C–700 °C) which occurs without the presence of oxygen and under limited environmental conditions. It can be produced from various residues such as rice husks, sawdust, kitchen waste, tea residues, etc. − The production processes for biochar are slow pyrolysis, fast pyrolysis, carbonization, evaporation, and hydrothermal carbonization. − The physical properties of biochar change during these processes, including elemental composition, phase structure, molecular structure, etc. Bakshi et al examined that the adsorption of Mg 2+ and Ca 2+ by nanozerovalent ions (nZVI) modified biochar is primarily due to the electrostatic interaction and ion exchange mechanism.…”

Section: Physicochemical Methodsmentioning

confidence: 99%

A Critical Review on the Sustainable Approaches for the Removal of Toxic Heavy Metals from Water Systems

Carolin

Kamalesh

Kumar³

et al. 2023

Ind. Eng. Chem. Res.

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Heavy metal pollution results in enormous environmental impacts and significant human health problems. Because of their extreme toxicity and lack of biodegradability, heavy metal ions in water are considered problematic. Although the removal of various heavy metal ions from wastewater has been widely investigated, heavy metal contamination still requires effective and suitable remediation. With special attention on heavy metal removal, this study reviews recent advances, breakthroughs, and potential applications of various physical, chemical, and biological methods. Each treatment method has specific mechanisms of interaction with metal ions, which are described in this review. The discussion in this review leads to the conclusion that adsorption has the best potential which leads to the sustainable remediation of heavy metals. In summary, the review provides a new perspective on heavy metal reduction and encourages the development of innovative strategies for heavy metal removal. The main current problems and prospects in this field are highlighted in this review.

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“…However, no similar work has been found with rice husk as a raw material. R. Gomez-Vazquez et al (2002) [60] published a study of pyrolysis and combustion combined to obtain both mesoporous silica materials and bioenergy (bio-oil and syngas) from rice husk. This is the only work in which silica is obtained by calcination of biochar and not by precipitation.…”

Section: Bio-silica Productionmentioning

confidence: 99%

Sustainable Harnessing of SiO2 Nanoparticles from Rice Husks: A Review of the Best Synthesis and Applications

Rodriguez-Otero,

Vargas,

Galarneau

et al. 2023

Processes

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The extraction of silica particles from rice husks has been extensively studied. This review aims to present the most efficient approach to harnessing rice husk biomass and converting silica into high-value-added materials for direct applications to address current challenges like water purification. Rice husks, as a residue from agriculture, had been largely used as a source of power through direct incineration in major rice-producing countries. However, rice husks present an intriguing opportunity as a renewable source of SiO2, offering a low-cost adsorbent with a high surface area and ease of functionalization that can be transformed into diverse mesoporous silica structures or composites, enabling applications in catalysis, drug delivery, water treatment, etc. This dual potential of rice husks can be harnessed by combining bio-oil and syngas production through pyrolysis with the efficient extraction of SiO2, ensuring the comprehensive utilization of the biomass. This review not only highlights the immense potential of silica nanoparticles but also serves as a roadmap for future investigations, with the ultimate aim of harnessing the full capabilities of this renewable and sustainable resource, contributing to the circular economy by yielding valuable by-products.

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Biogenic nanoporous oxides recovery from by-products of bioenergy production: Rice husks and corncob biochars

Cited by 10 publications

References 51 publications

Magnetic Biochar Obtained by Chemical Coprecipitation and Pyrolysis of Corn Cob Residues: Characterization and Methylene Blue Adsorption

Magnetic Biochar Obtained by Chemical Coprecipitation and Pyrolysis of Corn Cob Residues: Characterization and Methylene Blue Adsorption

A Critical Review on the Sustainable Approaches for the Removal of Toxic Heavy Metals from Water Systems

Sustainable Harnessing of SiO2 Nanoparticles from Rice Husks: A Review of the Best Synthesis and Applications

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