Uptake and Sequestration of Naphthalene and 1,2-Dichlorobenzene by C60

Cheng, Xuekun; Kan, Amy T.; Tomson, Mason B.

doi:10.1007/s11051-005-5674-z

Cited by 65 publications

(40 citation statements)

References 66 publications

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“…It has been proposed that the resistant desorption of hydrophobic organic contaminants from the aggregates of C 60 is due to the adsorption of organic molecules within the micropores of the C 60 aggregates [12,[26][27][28]. Thus, it might be reasonable to speculate that the two groups of nC 60 samples involved in the present study are of different microporous structures, resulting from the differences in aggregate formation between these two groups during the preparation of nC 60 samples.…”

Section: Mechanistic Aspectsmentioning

confidence: 88%

Contaminant‐mobilizing capability of fullerene nanoparticles (nC₆₀): Effect of solvent‐exchange process in nC₆₀ formation

Wang

Fortner

Hou

et al. 2012

Enviro Toxic and Chemistry

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Abstract-Fullerene nanoparticles (nC 60 ) in aqueous environments can significantly enhance the transport of hydrophobic organic contaminants by serving as a contaminant carrier. In the present study, the authors examine the effect of the solvent-exchange process on nC 60 aggregate formation and, subsequently, on nC 60 's contaminant-mobilizing capability. A series of nC 60 samples were prepared using a modified toluene-water solvent-exchange method through the inclusion of a secondary organic solvent in the phase transfer of molecular C 60 in toluene to nC 60 in water. Two groups of solvents-a water-miscible group and a non-water-miscible group-of varied polarity were selected as secondary solvents. The involvement of a secondary solvent in the phase transfer process had only small effects on the particle size and distribution, z potential, and mobility of the nC 60 products but significantly influenced the capability of nC 60 to enhance the transport of 2,2 0 ,5,5 0 -polychlorinated biphenyl (PCB) in a saturated sandy soil column, regardless of whether the secondary solvent was water-miscible or non-water-miscible. The two groups of secondary solvents appear to affect the aggregation properties of nC 60 in water via different mechanisms. In general, nC 60 products made with a secondary water-miscible solvent have stronger capabilities to enhance PCB transport. Taken together, the results indicate that according to formation conditions and solvent constituents, nC 60 will vary significantly in its interactions with organic contaminants, specifically as related to adsorption or desorption as well as transport in porous media. Environ. Toxicol. Chem. 2013;32:329-336. # 2012 SETAC

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Section: Mechanistic Aspectsmentioning

confidence: 88%

Contaminant‐mobilizing capability of fullerene nanoparticles (nC₆₀): Effect of solvent‐exchange process in nC₆₀ formation

Wang

Fortner

Hou

et al. 2012

Enviro Toxic and Chemistry

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“…If CNP aggregates could be dispersed effectively, the surface area and adsorption of organic contaminants would be expected to increase. Cheng et al (2005) found the adsorption of naphthalene and 1,2-dichlorobenzene on dispersed C 60 in toluene was orders of magnitude higher than that of aggregated C 60 . These authors also ml/g) were higher than those on "C 60 large aggregates" (K d =10 2.39 ml/g).…”

Section: Morphologymentioning

confidence: 93%

Organic contaminants and carbon nanoparticles: sorption mechanisms and impact parameters

Peng

Zhang

et al. 2014

J. Zhejiang Univ. Sci. A

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Carbon nanoparticles (CNPs) are novel manufactured materials with unique properties and have potential for a variety of applications. Adsorption of organic contaminants by discharged CNPs may affect the fate and transport of organic contaminants in the environment. This review summarizes the present research progress regarding organic contaminant adsorption on CNPs, and provides important information for the evaluation of the environmental behavior of organic contaminants and the risks associated with the use of CNPs. The main adsorption mechanisms involve hydrophobic interactions, π-π interactions, hydrogen bonds, and electrostatic interactions. These interactions may exist simultaneously, while the controlling adsorption mechanism differs depending on the properties of both the organic contaminants and the CNPs along with environmental conditions. The status of CNPs in the environment greatly affects or even controls their characteristics for adsorption of organic contaminants. The mobility and transport of dispersed CNPs and CNP-adsorbed organic contaminants could be promoted in natural aqueous environments, potentially increasing the spread of various organic contaminants and their associated environmental risks. Investigating the adsorption mechanisms and impact parameters is vital in predicting the environmental behaviors of both organic contaminants and CNPs and their associated risks.

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“…However, at a concentration of 0.5 % CNMs, 14 C-phenanthrene was mineralised to a greater extent with SWCNT amendments than FS. This disparity was attributed to variation in rates of phenanthrene desorption from the solid to aqueous phase, as desorption hysteresis occurs more commonly with fullerenes than CNTs due to differences in aggregate structure and availability of sorption sites (Cheng et al, 2005;Yang and Xing, 2007;Towell et al, 2011). The HPCD extractability of 14 C-phenanthrene was significantly reduced as a result of CNM amendment in a concentration-dependant manner due to increased numbers of sorption sites resulting in enhanced phenanthrene sorption (Towell et al, 2011).…”

Section: The Bioavailability and Bioaccessibility Of Cnm-associated Cmentioning

confidence: 99%

Carbon nanomaterials in clean and contaminated soils: environmental implications and applications

Riding

Martin

Jones

et al. 2015

SOIL

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Abstract. The exceptional sorptive ability of carbon nanomaterials (CNMs) for hydrophobic organic contaminants (HOCs) is driven by their characteristically large reactive surface areas and highly hydrophobic nature. Given these properties, it is possible for CNMs to impact on the persistence, mobility and bioavailability of contaminants within soils, either favourably through sorption and sequestration, hence reducing their bioavailability, or unfavourably through increasing contaminant dispersal. This review considers the complex and dynamic nature of both soil and CNM physicochemical properties to determine their fate and behaviour, together with their interaction with contaminants and the soil microflora. It is argued that assessment of CNMs within soil should be conducted on a case-by-case basis and further work to assess the long-term stability and toxicity of sorbed contaminants, as well as the toxicity of CNMs themselves, is required before their sorptive abilities can be applied to remedy environmental issues.

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Uptake and Sequestration of Naphthalene and 1,2-Dichlorobenzene by C60

Cited by 65 publications

References 66 publications

Contaminant‐mobilizing capability of fullerene nanoparticles (nC₆₀): Effect of solvent‐exchange process in nC₆₀ formation

Contaminant‐mobilizing capability of fullerene nanoparticles (nC₆₀): Effect of solvent‐exchange process in nC₆₀ formation

Organic contaminants and carbon nanoparticles: sorption mechanisms and impact parameters

Carbon nanomaterials in clean and contaminated soils: environmental implications and applications

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Uptake and Sequestration of Naphthalene and 1,2-Dichlorobenzene by C60

Cited by 65 publications

References 66 publications

Contaminant‐mobilizing capability of fullerene nanoparticles (nC60): Effect of solvent‐exchange process in nC60 formation

Contaminant‐mobilizing capability of fullerene nanoparticles (nC60): Effect of solvent‐exchange process in nC60 formation

Organic contaminants and carbon nanoparticles: sorption mechanisms and impact parameters

Carbon nanomaterials in clean and contaminated soils: environmental implications and applications

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Product

Resources

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Contaminant‐mobilizing capability of fullerene nanoparticles (nC₆₀): Effect of solvent‐exchange process in nC₆₀ formation

Contaminant‐mobilizing capability of fullerene nanoparticles (nC₆₀): Effect of solvent‐exchange process in nC₆₀ formation