Eco-friendly magnetic biochar: An effective trap for nanoplastics of varying surface functionality and size in the aqueous environment

Singh, Nisha; Khandelwal, Nitin; Ganie, Zahid Ahmad; Darbha, Gopala Krishna

doi:10.1016/j.cej.2021.129405

Cited by 87 publications

(17 citation statements)

References 59 publications

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“…5) as the coverage increases and to the fact that adsorbed NPs can be considered as new adsorption sites. Similar results have been reported by Abdoul Magid et al (2021) and Singh et al (2021) which investigated the adsorption and removal of polystyrene nanoparticles by biochar.…”

Section: Adsorption Isotherm Studiessupporting

confidence: 90%

Removal efficiency and adsorption mechanisms of CeO2 nanoparticles onto granular activated carbon used in drinking water treatment plants

Arenas

Coustumer

Gentile

et al. 2023

Science of The Total Environment

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Section: Adsorption Isotherm Studiessupporting

confidence: 90%

Removal efficiency and adsorption mechanisms of CeO2 nanoparticles onto granular activated carbon used in drinking water treatment plants

Arenas

Coustumer

Gentile

et al. 2023

Science of The Total Environment

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“…Iron Qiu et al 2020), aluminium (Cui et al 2020), magnesium (Zhu et al 2020a), and manganese (Zhang et al 2021d) are the most commonly used metals in metal oxide-biochar composites. Singh et al (2021) examined the behaviors of iron-functionalized biochar with magnetic extractability for the prompt and easy elimination of nano/microplastics. As illustrated in Fig.…”

Section: Biochar-based Compositesmentioning

confidence: 99%

“…Fig.1A Schematic illustration and chemical reactions of microwave-assisted one-pot synthesis of β-cyclodextrin functionalized biochar(Qu et al 2020). B The interaction mechanism between magnetic biochar and nanoplastics(Singh et al 2021) …”

mentioning

confidence: 99%

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

Qiu

Liu

Ling

et al. 2022

Biochar

302

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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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“…The microplastic contained in a water medium could also be effectively adsorbed and removed by using the magnetic properties of biochar activated with different metals (Fe, Mg, Zn, etc. ), treating the wastewater effectively through a series of filtration methods (Singh et al, 2021;Wang et al, 2021;Kumar et al, 2023).…”

Section: Biochar In Reducing Water Pollutionmentioning

confidence: 99%

“…Another relevant approach for microplastic removal from aqueous solutions has been suggested to use the magnesium and zinc-modified magnetic biochar by utilization of magnetic and thermal degradation approaches (Wang et al, 2021). Using iron modified biochar pyrolyzed at 850 and 550 °C demonstrated strong adsorption of microplastics (30-1000 nm, carboxyl, and amine functional groups) utilizing the magnetic property of biochar (Singh et al, 2021). Similarly, the application of peanut shell biochar, with or without modification with magnesium oxide metalloid, attained a significant removal (>75.53%) for microplastics from a porous medium (Wang et al, 2022).…”

Section: Biochar and Emerging-hazardous Wastes Such As Organic Pollut...mentioning

confidence: 99%

Advances and prospects of biochar in improving soil fertility, biochemical quality, and environmental applications

Nepal

Ahmad

Munsif

et al. 2023

Front. Environ. Sci.

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With the global food deficit increasing and rising climate change issues, there is a need to find green solutions to improve soil fertility and productivity while enhancing soil biochemical quality and reducing the ecological impact of agriculture. Biochar is a potentially cost-effective, carbonaceous resource with many agricultural and environmental applications. As a soil amendment, it improves soil physical and biochemical properties and increases soil fertility and productivity—particularly over the long-term—increasing soil aggregation, water retention, pH, and microbial activities, thus, improving overall soil quality, potentially helping to reduce chemical fertilizer needs over time. The extent of biochar’s impact on soil physiochemical properties varies depending on biochar source, type, size, inherent soil characteristics, cropping system, etc. Moreover, biochar has significant potential in soil and water remediation, especially through its unique adsorption and chemical properties capable to capture and immobilize pollutants such as metal(loid)s, organic pollutants, and hazardous emerging contaminants such as microplastics. Further, biochar has also emerged as a key strategic, cost-effective material to tackle global issues such as climate change mitigation, reducing the net greenhouse gas emission to minimize global warming potential. However, a knowledge gap remains as to understanding the long-term persistence of biochar on agroecosystem, optimal biochar application rate for the diversity of biochar-soil-crop-environmental conditions, interaction of biochar with inherent soil carbon stock, specific mechanisms of biochar’s effect on soil biotic properties, quantification of carbon sequestration, greenhouse gas emissions, synergy or potential antagonistic effects with other carbon sources such as compost, manure, residues, etc., its modification for environmental applications and associated environmental and human risks over long-term. Further research is needed to evaluate the long-term impacts of types and sizes of biochar on overall soil quality to recommend suitable application practices based on soil management and cropping system. Also, its environmental applications need to be finetuned for wider and target specific applications to tackle pressing environmental issues such as soil and water pollution.

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Eco-friendly magnetic biochar: An effective trap for nanoplastics of varying surface functionality and size in the aqueous environment

Cited by 87 publications

References 59 publications

Removal efficiency and adsorption mechanisms of CeO2 nanoparticles onto granular activated carbon used in drinking water treatment plants

Removal efficiency and adsorption mechanisms of CeO2 nanoparticles onto granular activated carbon used in drinking water treatment plants

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

Advances and prospects of biochar in improving soil fertility, biochemical quality, and environmental applications

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