Adsorption of polychlorinated dibenzo-p-dioxins/dibenzofurans on activated carbon from hexane

Zhou, Xu-Jian; Buekens, Alfons; Li, Xiaodong; Ni, Mingjiang; Cen, Kefa

doi:10.1016/j.chemosphere.2015.10.003

Cited by 28 publications

(11 citation statements)

References 26 publications

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“…The BET surface area was calculated to be about 248 m 2 g À1 , which was higher than carbon soot and part of commercial active carbon. 26 Carbon aerosol-based sponge was synthesized by a facile dipcoating method (Fig. 3a).…”

Section: Resultsmentioning

confidence: 99%

Synthesis and characterization of a plasma carbon aerosol coated sponge for recyclable and efficient separation and adsorption

Yang

et al. 2017

RSC Adv.

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Section: Resultsmentioning

confidence: 99%

Synthesis and characterization of a plasma carbon aerosol coated sponge for recyclable and efficient separation and adsorption

Yang

et al. 2017

RSC Adv.

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“…This might be due to their relatively high initial concentrations in PCDD/Fs. Owing to flotation, the residual concentrations of dioxins retained a similar low level and dioxins with higher initial concentrations seemed to have higher removal efficiencies (Zhou et al, 2016). Flotation cannot alter the congener fingerprint of dioxins in the aqueous phase significantly.…”

Section: Dioxin Congener Distribution Before and After Flotationmentioning

confidence: 95%

“…Flotation cannot alter the congener fingerprint of dioxins in the aqueous phase significantly. Accordingly, Zhou et al (2016) found that the fingerprint of dioxins contained in an n-hexane solution was similar to that of fly ash.…”

Section: Dioxin Congener Distribution Before and After Flotationmentioning

confidence: 98%

Effects of Surfactants on the Removal of Carbonaceous Matter and Dioxins from Weathered Incineration Fly Ash

Liu

Wei

et al. 2017

Aerosol Air Qual. Res.

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Our previous study demonstrated flotation to be effective in removing carbonaceous matter and dioxins from fresh fly ash in medical waste incinerators (MWIs). However, flotation of weathered fly ash seems to be difficult because of the oxidation of the ash surface and the presence of hydrophilic unburned carbon. Three types of surfactants namely nonionic Tween 80, anionic sodium dodecyl sulfate (SDS) and cationic CTAB were employed at different doses to improve flotation performance. Results indicated that Tween 80 exhibited superior decarburization performance compared with SDS and CTAB. The effect of surfactants on dioxin removal was found to correspond to the carbon removal from MWI fly ash. The optimal removal yields (90.6% of carbonaceous matter and 88.6% of dioxins) were obtained when 5% (w/w) Tween 80 was added. However, an excessive dose might cause the dissolution of dioxins.

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“…This is probably influenced by the different concentration of PCDDs and PCDFs in the initial concentrations (Zhou et al, 2016). Dioxins solution is extracted from fly ash, and the total concentration of PCDDs is lower than PCDFs (Table 1).…”

Section: The Effect Of Initial Concentration On the Removal Of Pcdd/fsmentioning

confidence: 99%

Experimental Study on PCDD/Fs Adsorption onto Nano-Graphite

Lin

et al. 2016

Aerosol Air Qual. Res.

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The adsorption of the 17 toxic 2,3,7,8-substituted dioxin congeners onto graphite was investigated using a laboratoryscale fixed-bed adsorption system. First, the morphology and microstructure of graphite were characterized by Scanning Electron Microscopy and Brunauer-Emmer-Teller surface estimation. Removal efficiency of the 17 toxic PCDD/Fs varies from 89.31% to 99.96% and the amount adsorbed on graphite is a linear function of the inlet concentration of PCDD/Fs, as it was varied from 2.3-20.7 ng I-TEQ Nm -3 . Operating over 3 hours, it is observed that the saturation time of fixed-bed adsorbers is less when the inlet concentration is higher. The removal efficiency of dioxin depends on vapour pressure and rises strongly with increasing chlorine substitution number. Removal efficiencies strongly correlate with vapour pressure, with R 2 0.96 for PCDDs and 0.99 for PCDFs, respectively. The removal efficiency of dioxin decreases linearly as the temperature increased (R 2 = 0.99). Possibly, π-π interactions between PCDD/Fs and graphite sheets lead to a high adsorption capacity of dioxin. The high mesopores volume and pore structure of graphite are critical factors when adsorbing dioxin.

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Adsorption of polychlorinated dibenzo-p-dioxins/dibenzofurans on activated carbon from hexane

Cited by 28 publications

References 26 publications

Synthesis and characterization of a plasma carbon aerosol coated sponge for recyclable and efficient separation and adsorption

Synthesis and characterization of a plasma carbon aerosol coated sponge for recyclable and efficient separation and adsorption

Effects of Surfactants on the Removal of Carbonaceous Matter and Dioxins from Weathered Incineration Fly Ash

Experimental Study on PCDD/Fs Adsorption onto Nano-Graphite

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