Adsorption of organic contaminants on biochar colloids: effects of pyrolysis temperature and particle size

Hameed, Rashida; Cheng, Lei; Lin, Daohui

doi:10.1007/s11356-020-08291-5

Cited by 38 publications

(6 citation statements)

References 39 publications

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“…For example, colloids derived from pyrolyzed biomass, such as rice or soy-bean straws, showed positive correlations between their PAHs sorption coefficients and their degree of humification, as determined by specific ultraviolet absorbance measurements. The role of hydrophobic interactions in PAHs removal has been further corroborated in two recent studies (Fu et al 2018 ; Hameed et al 2020 ) where phenanthrene sorption to PBNPs was positively correlated to the pseudo-micellar conformation of the PBNPs and their aromaticity. Recently, a similar finding was reported on sorption of galaxolide, a synthetic musk widely used in cosmetics care products and detergents, to PBNPs derived from wheat straw and rice husk pyrolyzed at 300–700 °C (Zhang et al 2019 ).…”

Section: Biochar-derived Nanoparticlesmentioning

confidence: 60%

Pyrolyzed biomass-derived nanoparticles: a review of surface chemistry, contaminant mobility, and future research avenues to fill the gaps

Swaren

Safari

Konhauser

et al. 2022

Biochar

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Nanoparticles are abundant in the subsurface, soil, streams, and water bodies, and are often a critical control on elemental speciation, transport and cycling in the natural environment. This review provides an overview of pyrolyzed biomass-derived nanoparticles (PBNPs), their surface properties and reactivity towards aqueous species. We focus specifically on biochar-derived nanoparticles and activated carbon-derived nanoparticles which fall under our classification of PBNPs. Activated carbon-iron (nano)composites are included in some instances where there are significant gaps in literature because of their environmental relevance. Increased use of activated carbon, along with a resurgence in the manufacture and application of biochar for water treatment and soil amendment, has generated significant concerns about the mobility and toxicity of PBNPs derived from the bulk material in environmental applications. Recent examples are discussed to highlight current progress in understanding the influence of PBNPs on contaminant transport, followed by a critical discussion of gaps and future research directions. Graphical Abstract

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Section: Biochar-derived Nanoparticlesmentioning

confidence: 60%

Pyrolyzed biomass-derived nanoparticles: a review of surface chemistry, contaminant mobility, and future research avenues to fill the gaps

Swaren

Safari

Konhauser

et al. 2022

Biochar

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“…[ 37 ] The H/C ratio was also low, which shows the high degree of aromaticity gave higher adsorption capacity and chemical activity of TBI K and TBT K . [ 41 ]…”

Section: Resultsmentioning

confidence: 99%

Functionalized typha biochar for antibiotic removal via low‐carbon integrated method: Performance and mechanism analyses

Liu,

Wen,

et al. 2024

CLEAN Soil Air Water

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Antibiotic residues in water represent an urgent environmental challenge. To efficiently remove these residues, a low‐carbon integrated biochar synthesis method was proposed, and an optimized typha biochar (TBIK) was prepared. Compared with the biochar prepared by a conventional two‐step carbonization and activation method (TBTK), the TBIK preparation process reduced energy consumption by 43849.58 J and cut carbon dioxide emissions by 32.80%. TBIK exhibited a large surface area of 1252.40 m2/g and rapidly achieved an equilibrium removal efficiency of 99.95% within 20 min for simulated antibiotics wastewater. Furthermore, TBIK possessed more number of functional groups than TBTK, especially O‐H and C‐S groups. The adsorption stability and tolerance of TBIK in solutions with different ionic strengths and coexisting anions were examined. Characterization techniques such as scanning electron microscopy (SEM), Fourier transform infrared (FT‐IR), and X‐ray photoelectron spectroscopy (XPS) as well as Brunauer, Emmett and Teller (BET) analyses were employed to elucidate the morphology and adsorption mechanism of the adsorbent. The microporous structure and abundance of functional groups are key to the excellent adsorption capabilities of TBIK. Thus, this integrated method for biochar production, optimized for treating antibiotic wastewater, holds significant potential for future applications.

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“…The average crystallite size for Z420, Z450, Z480, Z500, Z600 and ZnO were found to be 13.87 nm, 18.95 nm, 29.91 nm, 31.19 nm, 32.31 nm and 32.37 nm respectively. Generally, lower dimension of particle size possess higher point defects [25]. Therefore, the ZnO with smaller crystallite size are expected to have greater defects as compared to that with larger crystallite sizes.…”

Section: Structural Analysis Of the Adsorbentsmentioning

confidence: 99%

Probing the structural transformation of ZIF-L to ZnO for sustainable congo red dye removal

Priyananda Singh,

Wareppam,

Singh

et al. 2024

Phys. Scr.

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Severe water pollution due to industrial dye effluents has alarmed the scientific world to unravel a suitable technique and appropriate catalysts for dye removal and wastewater management. In the present work, the adsorbent capacity of ZnO was tuned by calcining ZIF-L, a class of Metal Organic Framework (MOF) at temperatures ranging from 300-600 oC. XRD, FTIR, FESEM-EDX and XPS analysis shows the decomposition of ZIF-L and the nucleation of ZnO at the higher calcining temperatures above 350 oC. The ZIF-L derived ZnO obtained at 420-500 oC exhibited higher CR removal capacity than ZIF-L and ZnO obtained through co-precipitation. The optimized calcining temperature was observed at 480 oC with a maximum Congo Red (CR) dye removal percentage of 94.8 %. The adsorption capacities increased from 24.88 mg g-1 to 117.07 mg g-1 as the initial adsorbent dosage decreased from 0.5 g L-1 to 0.1 g L-1. Further, the Langmuir and Freundlich isotherm studies predict the increase in adsorption capacity from 49.09 mg g-1 to 183.98 mg g-1as the initial dye concentration increases from 5 mg L-1 to 50 mg L-1 at the optimal Z480 adsorbent dose of 0.1 g L-1. The result shows that the dye adsorption kinetics and isotherm are well fitted with the Pseudo second order model and the Fruendlich model. The plausible mechanism of dye interaction with the surface of ZnO nanoparticles at different calcining temperatures is also discussed.

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Adsorption of organic contaminants on biochar colloids: effects of pyrolysis temperature and particle size

Cited by 38 publications

References 39 publications

Pyrolyzed biomass-derived nanoparticles: a review of surface chemistry, contaminant mobility, and future research avenues to fill the gaps

Pyrolyzed biomass-derived nanoparticles: a review of surface chemistry, contaminant mobility, and future research avenues to fill the gaps

Functionalized typha biochar for antibiotic removal via low‐carbon integrated method: Performance and mechanism analyses

Probing the structural transformation of ZIF-L to ZnO for sustainable congo red dye removal

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