Impacts of some environmentally relevant parameters on the sorption of polycyclic aromatic hydrocarbons to aqueous suspensions of fullerene

Hu, Xialin; Liu, Jingfu; Mayer, Philipp; Jiang, Guibin

doi:10.1897/08-009.1

Cited by 72 publications

(87 citation statements)

References 39 publications

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“…Due to its hydrophobicity, B(a)P absorbs to particulate matter in aqueous environments (Karickhoff, 1984), and TiO2NP, featuring a high surface area could act as adsorption surface for B(a)P. Indeed, previous studies have reported adsorption of PAHs, such as phenanthrene, fluoranthene, and chrysene, to C60 and gold ENPs (Baun et al, 2008;Farkas et al, 2012;Hu et al, 2008). Consequently, by adhesion to aggregating and settling TiO2NP, B(a)P could partly be removed from the water column and hence become less bioavailable.…”

Section: Discussionmentioning

confidence: 99%

The impact of TiO2 nanoparticles on uptake and toxicity of benzo(a)pyrene in the blue mussel (Mytilus edulis)

Farkas

Bergum

Nilsen

et al. 2015

Science of The Total Environment

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Nanoparticles are emerging contaminants of concern. Knowledge on their environmental impacts is scarce, especially on their interactive effects with other contaminants. In this study we investigated effects of titanium dioxide nanoparticles (TiO2NP) on the blue mussel (Mytilus edulis) and determined their influence on the bioavailability and toxicity of benzo(a)pyrene (B(a)P), a carcinogenic polyaromatic hydrocarbon (PAH). Blue mussels were exposed to either TiO2NP (0.2 and 2.0 mg L -1 ) or B(a)P (20 µg L -1 ) and to the respective combinations of these two compounds. Aqueous contaminant concentrations, the uptake of Ti and B(a)P into mussel soft tissue, effects on oxidative stress and chromosomal damage were analyzed. The uncoated TiO2NP agglomerated rapidly in the seawater. The presence of TiO2NP significantly reduced the bioavailability of B(a)P, shown by lowered B(a)P concentrations in exposure tanks and in mussel tissue. The activities of antioxidant enzymes superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GPx) were impacted by the various exposures regimes, indicating oxidative stress in the contaminant exposure groups. While SOD activity was increased only in the 0.2TiO2NP exposure group, CAT activity was enhanced in both combined exposure groups.The GPx activity was increased only in the groups exposed to the two single compounds. In hemocytes, increased chromosomal damage was detected in mussels exposed to the single compounds, which was further increased after exposure to the combination of compounds. In this study we show that the presence of TiO2NP in the exposure system reduced B(a)P uptake in blue mussels. However, since most biomarker responses did not decrease despite lower B(a)P uptake in combined exposures, the results suggest that TiO2NP can act as additional stressor, or potentially alters B(a)P toxicity by activation.

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Section: Discussionmentioning

confidence: 99%

The impact of TiO2 nanoparticles on uptake and toxicity of benzo(a)pyrene in the blue mussel (Mytilus edulis)

Farkas

Bergum

Nilsen

et al. 2015

Science of The Total Environment

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“…The effects of CNMs on the uptake of a compound might thus be better explained via the C free that can be measured with negligible depletion solid-phase microextraction (nd-SPME) (Mayer et al, 2000a,b;Hu et al, 2006;Yang et al, 2008). The C free of polycyclic aromatic hydrocarbons (PAHs) in nC 60 suspensions was measured in our previous study (Hu et al, 2008). The sorption of PAHs to nC 60 resulted in a remarkable decline of their C free , suggesting a reduced diffusive uptake of non-bound HOCs even at relatively low concentrations of nC 60 .…”

Section: Introductionmentioning

confidence: 99%

Bioavailability of organochlorine compounds in aqueous suspensions of fullerene: Evaluated with medaka (Oryzias latipes) and negligible depletion solid-phase microextraction

Liu

Zhou

et al. 2010

Chemosphere

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a b s t r a c tThe wide application of engineered nanomaterials, such as fullerene (C 60 ), will inevitably lead to their release into the aqueous environment, which may alter the bioavailability of organic compounds to aquatic organisms. Negligible depletion solid-phase microextraction (nd-SPME) together with medaka (Oryzias latipes) bioaccumulation were used to study the effects of aqueous suspensions of fullerene (nC 60 ) on the bioavailability of eight organochlorine compounds (OCCs) (log K OW 3.76-6.96). Freely dissolved concentrations of OCCs decreased by 11.5-88.4% at addition of 5 mg L À1 nC 60 as indicated by reduced equilibrium concentrations in the SPME fiber coating, the highest reduction being observed for the most hydrophobic OCCs. Medaka bioaccumulation study demonstrated that at the kinetic uptake regime, nC 60 significantly decreased the bioaccumulation of the high hydrophobic OCCs (log K OW > 6), but slightly enhanced the bioaccumulation of the less hydrophobic OCCs (log K OW < 6). The OCC concentrations in medaka (C fish ) at the kinetic uptake regime linearly correlated with that in nd-SPME fiber (C fiber ) without nC 60 (p = 0.007-0.013, R 2 = 0.666-0.723), but this correlation deteriorated with the presence of nC 60 (p = 0.073-0.081, R 2 = 0.423-0.440). These results suggest that in nC 60 the uptake mechanism of OCCs to medaka is different from that to nd-SPME fiber. While only the freely dissolved OCCs are available to nd-SPME fiber, both the freely dissolved and the nC 60 associated OCCs contributed to the accumulation of OCCs to medaka.

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“…Hu et al reported that aqueous suspensions of fullerene are able to effectively adsorb polycyclic aromatic hydrocarbons (PAHs). This behavior indicates that NPs can affect the solubility of hydrophobic organics contaminants in water [51]. Zero-valent iron nanoparticles represent a promising agent for environmental remediation, and they have been used in several studies as reducing agent to remediate contaminated sites with metals [17,139].…”

Section: Fate Of Nplts In the Environmentmentioning

confidence: 99%

Instrumental approach toward understanding nano-pollutants

Naghdi

Metahni

Ouarda

et al. 2017

Nanotechnol. Environ. Eng.

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Nano-pollutants (NPLTs) have recently raised global concerns due to their possible harmful impact on environment and human health. However, until date, information on the occurrence, fate and toxicity of NPLTs in environment is scant. The knowledge gap can be attributed to the lack of advanced and sophisticated methodologies for the precise detection and characterization of NPLTs at lower concentration in complex matrices, such as surface water, wastewater, soil and food. This review briefly discusses the performance of classical methods for characterization and study of the properties of NPLTs. The important properties include shape, size, aggregation state, chemical composition and structure. Chromatographic, microscopic and spectroscopic techniques have been developed for detection and quantitative estimation of fabricated or naturally existed NPLTs in different matrices. Often, combination of these techniques is required for the separation, purification and accurate estimation. For better detection and understanding of the initial steps of interaction with the environmental matrices, pollution sources, such as wastewater and industrial discharges, must be selected as sampling points. Understanding the dynamics of agglomeration, and decantation will allow to estimate the plume of transport to delimit the potential effects.

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Impacts of some environmentally relevant parameters on the sorption of polycyclic aromatic hydrocarbons to aqueous suspensions of fullerene

Cited by 72 publications

References 39 publications

The impact of TiO2 nanoparticles on uptake and toxicity of benzo(a)pyrene in the blue mussel (Mytilus edulis)

The impact of TiO2 nanoparticles on uptake and toxicity of benzo(a)pyrene in the blue mussel (Mytilus edulis)

Bioavailability of organochlorine compounds in aqueous suspensions of fullerene: Evaluated with medaka (Oryzias latipes) and negligible depletion solid-phase microextraction

Instrumental approach toward understanding nano-pollutants

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