Effect of biochar particle size on hydrophobic organic compound sorption kinetics: Applicability of using representative size

Kang, Sungkwon; Jung, Jihyeun; Choe, Jonggeun; Ok, Yong Sik; Choi, Yongju

doi:10.1016/j.scitotenv.2017.11.129

Cited by 58 publications

(15 citation statements)

References 44 publications

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“…4 and 5) owing to the larger particle size. Sorption equilibria had not been reached for the GAC-Fe3O4(B) composite after 40 h. These results are consistent with prior work showing the influence of particle size on sorption kinetics of hydrophobic organic solutes on activated carbon and biochars (Ahn et al, 2005;Kang et al, 2018). As shown, the rate of DD uptake by the fine 390 textured AC and AC-Fe3O4(A) is rapid with showing 97% removal of DD from aqueous 391 solution after one hour.…”

Section: Discussionsupporting

confidence: 87%

Synthesis and evaluation of Fe3O4-impregnated activated carbon for dioxin removal

Premachandra

Boyd

et al. 2021

Chemosphere

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Section: Discussionsupporting

confidence: 87%

Synthesis and evaluation of Fe3O4-impregnated activated carbon for dioxin removal

Premachandra

Boyd

et al. 2021

Chemosphere

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“…Several studies have found that including smaller biochar particle sizes can achieve improved contaminant removal, including bacteria (i.e., E. coli), 63 as well as dissolved contaminants such as heavy metals 90,91 and organics. 92,93 The particle size dependence of dissolved contaminant removal can be attributed to reduced intraparticle kinetic diffusion limitations, 61,91 as diffusion paths to internal sorption sites are shorter for smaller particle sizes. Bacteria are too large to diffuse through biochar pores to access internal surface area, so the improved removal of bacteria is likely caused by enhanced accessibility to external surface sites for smaller particle sizes.…”

Section: Environmental Science: Water Research and Technology Critical mentioning

confidence: 99%

Biochar-augmented biofilters to improve pollutant removal from stormwater – can they improve receiving water quality?

Boehm

Bell

Fitzgerald

et al. 2020

Environ. Sci.: Water Res. Technol.

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“…For more than a decade, research into the diverse applications of biochar has been increasing [1]. This increase is primarily driven by potential applications for biochar in agricultural practices [2][3][4][5][6]. Biochar refers to the solid carbonaceous product [7] produced naturally and commercially [8] via pyrolysis and gasification [9] from organic biomass.…”

Section: Introductionmentioning

confidence: 99%

Investigating the Influence of Biochar Amendment on the Physicochemical Properties of Podzolic Soil

et al. 2020

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Research into biochar, as an amendment to soil, has increased over the last decade. However, there is still much to understand regarding the effects of biochar type and rates on the physicochemical properties of different soil types. This study aimed to investigate the effects of biochar application on the physicochemical properties of podzolic soils. Soil samples were collected from the research site in Pasadena, Newfoundland, Canada. Experimental treatments consisted of three types of soils (topsoil, E-horizon soil and mixed soil (topsoil 2: E-horizon soil 1)), two biochar types (granular and powder) and four biochar application rates (0%, 0.5%, 1% and 2% on a weight basis). Ten physicochemical parameters (bulk density (BD), porosity, field capacity (FC), plant available water (PAW), water repellency (WR), electrical conductivity (EC), pH, cation exchange capacity (CEC), total carbon (TC), and nitrogen (N)) were investigated through a total of 72 experimental units. Biochar morphological structure and pore size distribution were examined using a scanning electron microscope, whereas specific surface area was assessed by the Brunauer−Emmett−Teller method. The result indicated that the E-horizon soil was highly acidic compared to control (topsoil) and mixed soils. A significant difference was observed between the control and 2% biochar amendment in all three soil mixtures tested in this experiment. Biochar amendments significantly reduced the soil BD (E-horizon: 1.40–1.25 > mixed soil: 1.34–1.21 > topsoil: 1.31–1.18 g cm−3), increased the CEC (mixed soil: 2.83–3.61 > topsoil: 2.61–2.70 > E-horizon: 1.40–1.25 cmol kg−1) and total C (topsoil: 2.40–2.41 > mixed soil: 1.74–1.75 > E-horizon: 0.43–0.44%). Water drop penetration tests showed increased WR with increasing biochar doses from 0 to 2% (topsoil: 2.33–4.00 > mixed soil: 2.33–3.33 > E-horizon: 4.00–4.67 s), and all the biochar–soil combinations were classified as slightly-repellent. We found significant effects of biochar application on soil water retention. Porosity increased by 2.8%, FC by 10%, and PAW by 12.9% when the soil was treated with powdered biochar. Additionally, we examined the temporal effect of biochar (0 to 2% doses) on pH and EC and observed an increase in pH (4.3–5.5) and EC (0.0–0.20 dS/m) every day from day 1–day 7. Collectively the study findings suggest 2% powder biochar application rate is the best combination to improve the physicochemical properties of the tested mixed podzolic soil. Granular and powdered biochar was found to be hydrophobic and hydrophilic, respectively. These findings could be helpful to better understand the use of biochar for improving the physicochemical properties of podzolic soils when used for agricultural practices in boreal ecosystems.

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Effect of biochar particle size on hydrophobic organic compound sorption kinetics: Applicability of using representative size

Cited by 58 publications

References 44 publications

Synthesis and evaluation of Fe3O4-impregnated activated carbon for dioxin removal

Synthesis and evaluation of Fe3O4-impregnated activated carbon for dioxin removal

Biochar-augmented biofilters to improve pollutant removal from stormwater – can they improve receiving water quality?

Investigating the Influence of Biochar Amendment on the Physicochemical Properties of Podzolic Soil

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