Valorization of almond shell biomass to biocarbon materials: Influence of pyrolysis temperature on their physicochemical properties and electrical conductivity

Debevc, Susan; Weldekidan, Haftom; Snowdon, Michael R.; Vivekanandhan, Singaravelu; Wood, Delilah F.; Misra, Manjusri; Mohanty, Amar K.

doi:10.1016/j.cartre.2022.100214

Cited by 19 publications

(4 citation statements)

References 52 publications

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“…For Pyr‐SC, R = 1.08; a higher R ‐value represented a higher degree of C defects 34 . C in Pyr‐SC was porous defective C, 35 which made Pyr easier to insert. These defects made Pyr‐SC an excellent Pyr carrier and increased the specific surface area of Pyr.…”

Section: Resultsmentioning

confidence: 99%

An economical pyrrhotite‐loaded sludge carbon composite effectively activated persulfate to sterilize Escherichia coli

Chen

Yang

Xia

et al. 2023

J of Chemical Tech & Biotech

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BACKGROUNDPersulfate (PS) has the capability to yield free radicals via activators, thereby shaping an advanced oxidation process that can significantly contribute to effective sterilization. Central to this technology is the pursuit of appropriate activators.RESULTSIn our research, we successfully synthesized an economical and efficient PS activator, namely a pyrrhotite‐loaded sludge carbon (Pyr‐SC) composite. This was achieved via a straightforward procedure utilizing two environmentally friendly and cost‐efficient raw materials: pyrite and sludge. Pyr‐SC exhibited a specific surface area of 60.4 m2 g−1 and rich functional groups such as carbon–sulfur and sulfur–oxygen. The magnetic and graphitic carbon structures were formed at high temperatures during the preparation process, and the sludge carbon (SC) exhibited porous defects, which allowed the effective insertion of iron/sulfur into SC to form the stable Pyr‐SC structure. Pyr‐SC activated PS, which further sterilized Escherichia coli in the wastewater at a sterilization rate of 7.00 lg E. coli at 107 cfu mL−1 in 80 min. The sterilization rate was less affected by temperature and pH. We verified sulfate, hydroxyl and oxygen free radicals produced by the Pyr‐SC‐activated PS. The Pyr‐SC composite, thanks to its expedited electron transfer, could activate PS to engender free radicals. Furthermore, the oscillatory transformation of iron ions caused by the monosulfide ion on the Pyr‐SC surface augmented the production of free radicals. An assessment of Pyr‐SC's stability was conducted, adhering to the principles of magnetic separation. After five cycles in the Pyr‐SC/PS reaction system, the sterilization rate reached 3.29 lg, whereas the leaching rate of iron in Pyr‐SC decreased. The Pyr‐SC/PS reaction system also had a broad spectrum of wastewater.CONCLUSIONThe economically prepared Pyr‐SC composite provided an effective technology for activating PS and sterilizing microorganisms in wastewater. © 2023 Society of Chemical Industry.

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Section: Resultsmentioning

confidence: 99%

An economical pyrrhotite‐loaded sludge carbon composite effectively activated persulfate to sterilize Escherichia coli

Chen

Yang

Xia

et al. 2023

J of Chemical Tech & Biotech

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“…This can be attributed to the robust H-bonding interaction between carboxyl and phenolic hydroxyl (C-OH) groups on the biochar surface and iron oxide (Fe-OH), corresponding to magnetization. [55][56][57] In the h cycle, the extraction efficiency decreased to 88.63%. This decline may be attributed to a reduction in the number of binding sites on the surface of AMBC.…”

Section: Regenerationmentioning

confidence: 98%

The potential of lignocellulosic biomass for magnetic solid phase extraction of naproxen from saliva samples

Aouled Abdallah,

Ben Sghaier,

Zougagh

et al. 2024

Anal. Methods

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“…Some studies also mention the effect of oxygen content when it comes to electrical conductivity of carbon material. 69 The biocarbon obtained by almond shells and hulls at 700 °C showed an overall improvement in conductivity compared to the products generated at 300 and 500 °C, 69 which is associated with the lower oxygen content of the biocarbon gained by 700 °C. Ana et al 70 explained this phenomenon further.…”

Section: Metallurgical Properties Of Biocarbonsmentioning

confidence: 99%

Metallurgical Properties of Biocarbon in Ferroalloy Production─A Review

Han,

Tangstad

2024

ACS Omega

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The significant volume of CO 2 emissions contributes to global warming, which has drawn substantial attention. Metallurgical processes contribute to around 30% of these emissions, with ferroalloy smelting alone equivalent to the collective mean CO 2 emissions from 11.8 million people. Biocarbon emerges as a promising substitute for fossil reductants, and its research and industrial application have the potential to significantly curtail emissions on a relatively short time scale. As a result, extensive research has been conducted on biobased carbon materials and their practical utilization in metal production processes. In this review, an overview of the methodologies employed to assess the CO 2 reactivity, electrical conductivity, reactivity toward slag and SiO, and mechanical strength is illustrated. The impact of characterizations on its behavior within furnaces is concluded. Furthermore, the ongoing efforts to substitute traditional fuels with these environmentally friendly materials in the sintering process are introduced. The metallurgical properties of biocarbon are closely related to its chemical composition and physical characteristics, such as porosity, surface area, and internal structure. It has higher CO 2 reactivity, lower electrical conductivity, higher SiO reactivity, and lower mechanical strength than conventional coke. Some of the drawbacks can be addressed through techniques such as densification, pyrolysis, carbonization, and agglomeration, effectively mitigating these limitations. Additionally, the current application situation on sintering has demonstrated that the substitution of specific coke amounts with biobased reductants in the ore agglomeration process can save energy. The incorporation of biocarbon in metallurgy is a feasible and potential way to reduce CO 2 emissions, and this work deserves a valuable and significant endeavor.

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Valorization of almond shell biomass to biocarbon materials: Influence of pyrolysis temperature on their physicochemical properties and electrical conductivity

Cited by 19 publications

References 52 publications

An economical pyrrhotite‐loaded sludge carbon composite effectively activated persulfate to sterilize Escherichia coli

An economical pyrrhotite‐loaded sludge carbon composite effectively activated persulfate to sterilize Escherichia coli

The potential of lignocellulosic biomass for magnetic solid phase extraction of naproxen from saliva samples

Metallurgical Properties of Biocarbon in Ferroalloy Production─A Review

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