New notion of biochar: A review on the mechanism of biochar applications in advannced oxidation processes

Zhou, Xiong; Zhu, Yuan; Niu, Qiuya; Zeng, Guangming; Lai, Cui; Liu, Shiyu; Huang, Danlian; Qin, Lei; Liu, Xigui; Li, Bisheng; Yi, Huan; Fu, Yukui; Li, Ling; Zhang, Mingming; Zhou, Chengyun; Liu, Jiahuan

doi:10.1016/j.cej.2021.129027

Cited by 213 publications

(43 citation statements)

References 199 publications

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“…Preparation of suitable materials to achieve or maintain adequate elimination effect on a variety of water-based refractory chemicals is a feasible way to solve the above problems. The latest research indicates the potential of biochar in wastewater treatment applications, such as catalysis, adsorption, redox, or biocidal, all of which involve various reaction mechanisms (Kamali et al 2021;Zhao et al 2021b;Zhou et al 2021). The main benefits of biochar-based materials lie in their highly porous, large surface area, better ion exchange capacity, and plentiful functional groups.…”

Section: Introductionmentioning

confidence: 99%

Biochar for the removal of contaminants from soil and water: a review

Qiu

Liu

Ling

et al. 2022

Biochar

377

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Biochar shows significant potential to serve as a globally applicable material to remediate water and soil owing to the extensive availability of feedstocks and conducive physio-chemical surface characteristics. This review aims to highlight biochar production technologies, characteristics of biochar, and the latest advancements in immobilizing and eliminating heavy metal ions and organic pollutants in soil and water. Pyrolysis temperature, heat transfer rate, residence time, and type of feedstock are critical influential parameters. Biochar’s efficacy in managing contaminants relies on the pore size distribution, surface groups, and ion-exchange capacity. The molecular composition and physical architecture of biochar may be crucial when practically applied to water and soil. In general, biochar produced at relatively high pyrolysis temperatures can effectively manage organic pollutants via increasing surface area, hydrophobicity and microporosity. Biochar generated at lower temperatures is deemed to be more suitable for removing polar organic and inorganic pollutants through oxygen-containing functional groups, precipitation and electrostatic attraction. This review also presents the existing obstacles and future research direction related to biochar-based materials in immobilizing organic contaminants and heavy metal ions in effluents and soil. Graphical Abstract

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Section: Introductionmentioning

confidence: 99%

Biochar for the removal of contaminants from soil and water: a review

Qiu

Liu

Ling

et al. 2022

Biochar

377

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“…It was noted that almost no degradation of MB occurred in 1 mM H 2 O 2 solution without the Cu 3 SnS 4 catalyst, demonstrating the photocatalysis mediated generation of ROS and degradation of MB. In advanced oxidation technologies, hydroxyl radicals (·OH) are known as one of the key active species for MB degradation with a redox potential of + 2.8 V (versus NHE) in acidic media and + 1.5 V (versus NHE) in basic media [ 35 ]. To test whether ·OH was generated during the Cu 3 SnS 4 mediated photocatalytic process, t -butanol ( t -BuOH), a powerful ·OH scavenger [ 36 ], was pre-added to the reaction mixture to investigate whether the degradation could be retarded.…”

Section: Resultsmentioning

confidence: 99%

Photogenerated reactive oxygen species and hyperthermia by Cu3SnS4 nanoflakes for advanced photocatalytic and photothermal antibacterial therapy

Yang

Wang

et al. 2022

J Nanobiotechnol

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Background The rapid spread of infectious bacteria has brought great challenges to public health. It is imperative to explore effective and environment-friendly antibacterial modality to defeat antibiotic-resistant bacteria with high biosafety and broad-spectrum antibacterial property. Results Herein, biocompatible Cu3SnS4 nanoflakes (NFs) were prepared by a facile and low-cost fabrication procedure. These Cu3SnS4 NFs could be activated by visible light, leading to visible light-mediated photocatalytic generation of a myriad of reactive oxygen species (ROS). Besides, the plasmonic Cu3SnS4 NFs exhibit strong near infrared (NIR) absorption and a high photothermal conversion efficiency of 55.7%. The ROS mediated cellular oxidative damage and the NIR mediated photothermal disruption of bacterial membranes collaboratively contributed to the advanced antibacterial therapy, which has been validated by the efficient eradication of both Gram-negative Escherichia coli and Gram-positive methicillin-resistant Staphylococcus aureus strains in vitro and in vivo. Meanwhile, the exogenous copper ions metabolism from the Cu3SnS4 NFs facilitated the endothelial cell angiogenesis and collagen deposition, thus expediting the wound healing. Importantly, the inherent localized surface plasmon resonance effect of Cu3SnS4 NFs empowered them as an active substrate for surface-enhanced Raman scattering (SERS) imaging and SERS-labeled bacteria detection. Conclusions The low cost and biocompatibility together with the solar-driven broad-spectrum photocatalytic/photothermal antibacterial property of Cu3SnS4 NFs make them a candidate for sensitive bacteria detection and effective antibacterial treatment. Graphical Abstract

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“…Over the last few decades, biochars have been reported to possess a good adsorption capacity toward heavy metal ions, and the characteristics and structures of biochars play an important role in this process [ 10 ]. To obtain effective biochar adsorbents, various agricultural wastes and by-products have been explored, such as palmae shell [ 11 ], hardwood [ 12 ], corn straw [ 12 ], phragmites biomass [ 13 ], banana peels [ 14 ], mango peels [ 15 ], cauliflower leaves [ 16 ], etc.…”

Section: Introductionmentioning

confidence: 99%

Single-Step Hydrothermal Synthesis of Biochar from H3PO4-Activated Lettuce Waste for Efficient Adsorption of Cd(II) in Aqueous Solution

et al. 2022

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Developing an ideal and cheap adsorbent for adsorbing heavy metals from aqueous solution has been urgently need. In this study, a novel, effective and low-cost method was developed to prepare the biochar from lettuce waste with H3PO4 as an acidic activation agent at a low-temperature (circa 200 °C) hydrothermal carbonization process. A batch adsorption experiment demonstrated that the biochar reaches the adsorption equilibrium within 30 min, and the optimal adsorption capacity of Cd(II) is 195.8 mg∙g−1 at solution pH 6.0, which is significantly improved from circa 20.5 mg∙g−1 of the original biochar without activator. The fitting results of the prepared biochar adsorption data conform to the pseudo-second-order kinetic model (PSO) and the Sips isotherm model, and the Cd(II) adsorption is a spontaneous and exothermic process. The hypothetical adsorption mechanism is mainly composed of ion exchange, electrostatic attraction, and surface complexation. This work offers a novel and low-temperature strategy to produce cheap and promising carbon-based adsorbents from organic vegetation wastes for removing heavy metals in aquatic environment efficiently.

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New notion of biochar: A review on the mechanism of biochar applications in advannced oxidation processes

Cited by 213 publications

References 199 publications

Biochar for the removal of contaminants from soil and water: a review

Biochar for the removal of contaminants from soil and water: a review

Photogenerated reactive oxygen species and hyperthermia by Cu3SnS4 nanoflakes for advanced photocatalytic and photothermal antibacterial therapy

Single-Step Hydrothermal Synthesis of Biochar from H3PO4-Activated Lettuce Waste for Efficient Adsorption of Cd(II) in Aqueous Solution

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