Application of Biochar for Removal of Emerging Contaminants

Mishra, B.K.; Aggarwal, Mohit; Remya, Neelancherry

doi:10.1007/978-981-16-8367-1_10

Cited by 3 publications

(3 citation statements)

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“…In recent years, nano‐oxides/nano‐sulfides of transition metals coated on the surface of biochar have been prepared and used as catalysts for photodegradation and oxidation processes. Their efficiencies in degrading contaminants are greatly improved by combining them with biochar in the form of single‐transition‐metal and double‐transition‐metal oxides/sulfides 32‐34 . Biochar–metal composites were shown to play synergistic action in ROS generation, electron transfer, adsorption and oxidation of pollutants 13 …”

Section: Introductionmentioning

confidence: 99%

“…Their efficiencies in degrading contaminants are greatly improved by combining them with biochar in the form of single-transition-metal and double-transition-metal oxides/sulfides. [32][33][34] Biochar-metal composites were shown to play synergistic action in ROS generation, electron transfer, adsorption and oxidation of pollutants. 13 Among transition metals, the use of manganese as a sorbent, an oxidant and a catalyst in chemical oxidation has drawn attention.…”

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confidence: 99%

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Degradation of phenol and sulfamethoxazole with persulfate and ozone with nano‐MnO₂–biochar composites

Oh,

Lee,

Ryu

2024

J of Chemical Tech & Biotech

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BACKGROUNDIn this study, nano‐MnO2–biochar composites were synthesized as catalysts to promote the oxidation of recalcitrant organic contaminants. The MnO2 nanoparticles coated on biochar were hypothesized to enhance the oxidation of phenol and sulfamethoxazole (SMX) using ozone and/or persulfate.RESULTSThe optimal percentage of MnO2 coating on the surface of biochar was determined, and the synthesis of nano‐MnO2‐coated biochar was confirmed via scanning electron microscopy–energy dispersive X‐ray spectroscopy (EDS), X‐ray diffraction, and EDS line mapping analyses. Compared with oxidation using ozone or persulfate in the presence of either nano‐MnO2 or biochar, the synthesized nano‐MnO2–biochar composite markedly enhanced the oxidation of phenol and SMX. This was probably due to the spreading of MnO2 nanorods on the surface of biochar and the synergistic involvement of nano‐MnO2 and biochar as catalysts. X‐ray photoelectron spectroscopy analysis confirmed the involvement of Mn3+ in MnO2 to promote oxidation using ozone or persulfate. The co‐existence of ozone and persulfate could also promote oxidation. Hydroxyl radicals (OH⋅) and persulfate radicals (SO4−⋅) were major reactive oxygen species for ozone and persulfate systems, respectively.CONCLUSIONResults suggest that the synthesized nano‐MnO2–biochar composites may be effective catalysts for various types of advanced oxidation processes in environmental remediation.This article is protected by copyright. All rights reserved.

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Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

Degradation of phenol and sulfamethoxazole with persulfate and ozone with nano‐MnO₂–biochar composites

Oh,

Lee,

Ryu

2024

J of Chemical Tech & Biotech

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“…Biochar technology can lead to C negative agricultural systems and help mitigate climate change (Goswami et al., 2021; Ong et al., 2021). Biochar is a carbon (C)‐rich product obtained from pyrolysis (heating under oxygen‐deficient conditions) of biomass (such as wood chips, crop residue, or manure) and used as a soil amendment or a C sequestration agent (Lehmann & Joseph, 2015; Mishra et al., 2022; Wang & Wang, 2019). Globally, it has been estimated that biochar use could reduce GHG emissions from soils by 3.4–6.3 Pg CO 2 equivalent (Lehmann et al., 2021).…”

Section: Introductionmentioning

confidence: 99%

Biochar as a negative emission technology: A synthesis of field research on greenhouse gas emissions

et al. 2023

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Biochar is one of the few nature‐based technologies with potential to help achieve net‐zero emissions agriculture. Such an outcome would involve the mitigation of greenhouse gas (GHG) emission from agroecosystems and optimization of soil organic carbon sequestration. Interest in biochar application is heightened by its several co‐benefits. Several reviews summarized past investigations on biochar, but these reviews mostly included laboratory, greenhouse, and mesocosm experiments. A synthesis of field studies is lacking, especially from a climate change mitigation standpoint. Our objectives are to (1) synthesize advances in field‐based studies that have examined the GHG mitigation capacity of soil application of biochar and (2) identify limitations of the technology and research priorities. Field studies, published before 2022, were reviewed. Biochar has variable effects on GHG emissions, ranging from decrease, increase, to no change. Across studies, biochar reduced emissions of nitrous oxide (N2O) by 18% and methane (CH4) by 3% but increased carbon dioxide (CO2) by 1.9%. When biochar was combined with N‐fertilizer, it reduced CO2, CH4, and N2O emissions in 61%, 64%, and 84% of the observations, and biochar plus other amendments reduced emissions in 78%, 92%, and 85% of the observations, respectively. Biochar has shown potential to reduce GHG emissions from soils, but long‐term studies are needed to address discrepancies in emissions and identify best practices (rate, depth, and frequency) of biochar application to agricultural soils.

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Synthesis, characterization, and application of oxidant-modified biochar prepared from sawdust for sequestration of basic fuchsin: isotherm, kinetics, and toxicity studies

Varadharaj¹,

Ramesh²,

Kumar³

et al. 2023

Biomass Conv. Bioref.

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Application of Biochar for Removal of Emerging Contaminants

Cited by 3 publications

References 56 publications

Degradation of phenol and sulfamethoxazole with persulfate and ozone with nano‐MnO₂–biochar composites

Degradation of phenol and sulfamethoxazole with persulfate and ozone with nano‐MnO₂–biochar composites

Biochar as a negative emission technology: A synthesis of field research on greenhouse gas emissions

Synthesis, characterization, and application of oxidant-modified biochar prepared from sawdust for sequestration of basic fuchsin: isotherm, kinetics, and toxicity studies

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Application of Biochar for Removal of Emerging Contaminants

Cited by 3 publications

References 56 publications

Degradation of phenol and sulfamethoxazole with persulfate and ozone with nano‐MnO2–biochar composites

Degradation of phenol and sulfamethoxazole with persulfate and ozone with nano‐MnO2–biochar composites

Biochar as a negative emission technology: A synthesis of field research on greenhouse gas emissions

Synthesis, characterization, and application of oxidant-modified biochar prepared from sawdust for sequestration of basic fuchsin: isotherm, kinetics, and toxicity studies

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Product

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Degradation of phenol and sulfamethoxazole with persulfate and ozone with nano‐MnO₂–biochar composites

Degradation of phenol and sulfamethoxazole with persulfate and ozone with nano‐MnO₂–biochar composites