Optimization of biochar production based on environmental risk and remediation performance: Take kitchen waste for example

Xu, Congbin; Tan, Xiao; Zhao, Jianfu; Cao, Jinman; Ren, Meng; Xiao, Yong; Lin, Aoxiang

doi:10.1016/j.jhazmat.2021.125785

Cited by 49 publications

(11 citation statements)

References 66 publications

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“…Aer adsorption of OFX, for C1s, the peak area ratio of C-C/C]C decreased from 66% to 57.09% for a signicant decrease, the peak area ratio of O-C]O decreased from 8.46% to 7.86%, and the peak area ratio of C-O increased from 24.78% to 35.05% for a signicant increase. Probably due to that they combined with the groups in OFX through hydrogen bonding and p-p EDA interactions, 65 which was consistent with the FTIR results. For O 1s, the peak area ratio of C]O increased from 29.97% to 31.66%, which might be a result of its serving as electron donors during OFX adsorption.…”

Section: Adsorption Mechanismsupporting

confidence: 82%

A stable Fe/Co bimetallic modified biochar for ofloxacin removal from water: adsorption behavior and mechanisms

Hao

et al. 2022

RSC Adv.

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Section: Adsorption Mechanismsupporting

confidence: 82%

A stable Fe/Co bimetallic modified biochar for ofloxacin removal from water: adsorption behavior and mechanisms

Hao

et al. 2022

RSC Adv.

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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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“…2a. The RHB produced a sequence of parallel channels with different porosities that signify the shape of the layer in the RHB structure, which was desirable for the adsorption process because the channels and gaps help the adsorbent reach active positions faster [36]. The results of the FESEM analysis for synthesized three-component nanocomposite are presented in Fig.…”

Section: Fesemmentioning

confidence: 99%

Using a promising biomass-based biochar in photocatalytic degradation: highly impressive performance of RHB/SnO2/Fe3O4 for elimination of AO7

Sadati

Ayati

2023

Photochem Photobiol Sci

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The release of industrial dyes into the environment has recently increased, resulting in harmful effects on people and ecosystems. In recent years, the use of adsorbents in photocatalytic nanocomposites has attracted significant interest due to their low cost, efficiency, and eco-friendly physical and chemical characteristics. Herein, Acid Orange 7 (AO7) removal was investigated by photocatalytic degradation using Rice Rusk Biochar (RHB), Tin (IV) Oxide (SnO 2 ), and Iron Oxide (Fe 3 O 4 ) as heterogeneous nanocomposite. After the preparation of RHB, the nanocomposite was synthesized and characterized using Field Emission Scanning Electron Microscope (FESEM), X-ray Powder Diffraction (XRD), Brunauer-Emmett-Teller (BET), and Fourier-Transform Infrared Spectroscopy (FT-IR). To optimize the elimination of AO7 by the One-Factor-At-a-Time (OFAT) method, effective parameters including mixing ratio (RHB:SnO 2 :Fe 3 O 4 ), dye concentration, solution pH, and nanocomposite dose were studied. The results showed that the removal efficiency of AO7 after 120 min under the optimal mixing ratio of 1:1.5:0.6, dye concentration of 75 mg/l, solution pH of 4, and nanocomposite dose of 0.7 g/l was 92.37%. Moreover, Chemical Oxygen Demand (COD) and Total Organic Carbon (TOC) removal rates were obtained at 82.22 and 72.22%, respectively. The Average Oxidation State (AOS) and Carbon Oxidation State (COS) of the AO7 solution were increased after the process, indicating biodegradability improvement. Various scavenger effects were studied under optimal conditions, and the results revealed that O 2 − and H + reactive species play a crucial role in the photocatalytic degradation of AO7. The reusability and stability of nanocomposite were tested in several consecutive experiments, and the degradation efficiency was reduced from 92 to 79% after five consecutive cycles. It is expected that this research contributes significantly to the utilization of agricultural waste in photocatalytic nanocomposites for the degradation of environmental pollutants.

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Optimization of biochar production based on environmental risk and remediation performance: Take kitchen waste for example

Cited by 49 publications

References 66 publications

A stable Fe/Co bimetallic modified biochar for ofloxacin removal from water: adsorption behavior and mechanisms

A stable Fe/Co bimetallic modified biochar for ofloxacin removal from water: adsorption behavior and mechanisms

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

Using a promising biomass-based biochar in photocatalytic degradation: highly impressive performance of RHB/SnO2/Fe3O4 for elimination of AO7

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