Characteristics and quantification of mechanisms of Cd2+ adsorption by biochars derived from three different plant-based biomass

Dai, Weijie; Xu, Meili; Zhao, Zilin; Zheng, Jiatong; Huang, Fei; Wang, Heng; Liu, Chufan; Xiao, Rongbo

doi:10.1016/j.arabjc.2021.103119

Cited by 46 publications

(11 citation statements)

References 52 publications

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“…X-ray diffraction (XRD) analysis is an indispensable step in gaining information about the nanomaterials’ crystal structure and crystal lattice. , The XRD spectrum of the pristine biochar (Figure S1a) exhibited characteristic peaks at 28.5, 40.6, and 50.26°, which were indexed to the (002), (100), and (004) planes, respectively, as previously mentioned by other workers, whereas the XRD pattern of the Ag@biochar composite (Figure S1b) demonstrated the same peaks of the pristine biochar yet with a lower intensity and other new peaks at 32.1, 46.06, and 62.5° which were indexed to the (111), (200), and (220) planes, respectively, referring to face-centered-cubic silver (JCPDS file number 04-0783). Moreover, the (111) plane, in accordance with many workers, was the preferred growth direction for the phytosynthesized Ag@biochar nanocomposite.…”

Section: Resultssupporting

confidence: 63%

Novel Biogenic Synthesis of a Ag@Biochar Nanocomposite as an Antimicrobial Agent and Photocatalyst for Methylene Blue Degradation

et al. 2022

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The conventional synthesis of nanomaterials employing physical and chemical methods usually requires high cost and toxic chemicals. Thus, a facile, ecofriendly, cost-effective, novel, and sustainable route for the synthesis of a silver-loaded biochar nanocomposite (Ag@biochar) using Chenopodium ambrosioides leaf extract and biomass is reported for the first time in this study to advocate many of the principles of green chemistry such as safer solvents and auxiliaries. UV spectroscopic analysis at 420 nm indicated the formation of silver nanoparticles (AgNPs). The band gap energy of Ag@biochar was 1.9 eV, confirming its potential use as a photocatalyst. Ag@biochar was found to be photoluminescent at 425 nm. AgNPs on the surface of biochar were predominantly spherical with a size range of 25–35 nm and a surface area of 47.61 m2/g. A zeta potential of −5.87 mV designated the stability of Ag@biochar. Testing the photocatalytic potential of Ag@biochar to remove methylene blue from wastewater demonstrated its high removal efficiency that reached 88.4% due to its high efficiency of electron transfer confirmed via electrochemical impedance spectroscopy analysis and retained 70.65% after six cycles of reuse. Ag@biochar was shown to be a powerful broad-spectrum antimicrobial agent as it completely prevented the growth of Escherichia coli and also inhibited the growth of Pseudomonas aeruginosa, Klebsiella pneumoniae, Bacillus subtilis, and Candida albicans with the inhibition zones of 19, 18, 22, and 16 mm, respectively.

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Section: Resultssupporting

confidence: 63%

Novel Biogenic Synthesis of a Ag@Biochar Nanocomposite as an Antimicrobial Agent and Photocatalyst for Methylene Blue Degradation

et al. 2022

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“…6), the percentage of O-C = O increased after TC adsorption, while the content of C-O decreased. The shift of binding energy means the change in the functional groups, indicating that the oxygen-containing functional groups play an important role in the adsorption process through H bonding interaction [68]. Further, the binding energies of the C = O groups after TC adsorption shifted to 532.35 eV (O-C = O), revealing the formation of complex compound due to the interaction between lone pair electrons of oxygenous groups and TC [23].…”

Section: Adsorption Mechanisms Of Tc By Peanut Shell Biocharsmentioning

confidence: 98%

Enhanced adsorption performance of tetracycline in aqueous solutions by KOH-modified peanut shell-derived biochar

Yin

Xie

et al. 2021

Biomass Conv. Bioref.

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Modification of biochar is essential to improve its properties and then promote its adsorption effect. In this study, modified biochar derived from peanut shell was prepared by KOH treatment. Adsorption behavior and mechanisms toward tetracycline (TC) by biochar were investigated. The results showed that KOH modification significantly changed the surface morphology, pore structure, elemental composition, functional groups, minerals, and carbon defects of biochar. The content of C, H, N, and S of biochar decreased as well as the content of O and ash increased after KOH modification. Surface area and pore volume of KBC were 1271.97 m 2 •g −1 and 0.653 cm 3 •g −1 , which was 5.8 and 5.4 folds than that of BC, respectively. KOH modification also changed the Ca, Si minerals components in biochar. Moreover, the functional groups in biochar also significantly changed after modification, especially O-and N-containing groups. More carbon defects occurred in KBC due to the KOH reactions. Pseudo-second-order model and Langmuir model can better describe the adsorption processes of TC on biochars. The maximum adsorption capacity of TC on KBC reached 356.19 mg•g −1 at 318.15 K. KBC has a stable removal effect to TC in a wide pH range and under the interference of co-existing ions. Pore filling and π-π interaction were the main adsorption mechanisms for TC removal by KBC. Therefore, KOH-modified peanut shell-derived biochar has a potential to act as an adsorbent to remove TC from aqueous solutions or immobilization in soils.

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“…The method is most commonly used owing to its uidity with biomass feedstock sources and exible operating conditions. Various biomass raw materials like crab shell, 55 rice straw, eucalyptus leaves and vetiver grass, 56 Caragana korshinskii, 57 corn stalk and polyethylene, 58 etc., have favourably been converted into porous carbons by pyrolysis. The conversion involves reactions like dehydration, condensation, crosslinking, depolymerization, fragmentation and isomerization.…”

Section: Pyrolysis Carbonizationmentioning

confidence: 99%

Recent advancement of biomass-derived porous carbon based materials for energy and environmental remediation applications

et al. 2022

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Characteristics and quantification of mechanisms of Cd2+ adsorption by biochars derived from three different plant-based biomass

Cited by 46 publications

References 52 publications

Novel Biogenic Synthesis of a Ag@Biochar Nanocomposite as an Antimicrobial Agent and Photocatalyst for Methylene Blue Degradation

Novel Biogenic Synthesis of a Ag@Biochar Nanocomposite as an Antimicrobial Agent and Photocatalyst for Methylene Blue Degradation

Enhanced adsorption performance of tetracycline in aqueous solutions by KOH-modified peanut shell-derived biochar

Recent advancement of biomass-derived porous carbon based materials for energy and environmental remediation applications

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