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

• Published in: Chemosphere (Oxford) Vol. 80; no. 7; pp. 693 - 700
• Main Authors: Hu, Xialin, Liu, Jingfu, Zhou, Qunfang, Lu, Shiyan, Liu, Rui, Cui, Lin, Yin, Daqiang, Mayer, Philipp, Jiang, Guibin
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.08.2010; Elsevier
• Subjects: Animals; Applied sciences; Bioaccumulation; Bioavailability; Correlation; Depletion; Dissolution; Exact sciences and technology; Fibers; Freshwater; Fullerene suspensions; Fullerenes; Fullerenes - chemistry; Fullerenes - metabolism; Hydrocarbons, Chlorinated - chemistry; Hydrocarbons, Chlorinated - isolation & purification; Hydrocarbons, Chlorinated - metabolism; Hydrophobic and Hydrophilic Interactions; Neodymium; Organochlorine compounds; Oryzias - metabolism; Pollution; Solid Phase Microextraction; Suspensions; Uptakes; Water Pollutants, Chemical - chemistry; Water Pollutants, Chemical - isolation & purification; Water Pollutants, Chemical - metabolism; Solid-phase microextraction; Bioavailability; Fullerene suspensions; Organochlorine compounds; Pollutant behavior; Hydrophobic compound; Partition coefficient; Solid phase microextraction; Vertebrata; Depletion; Correlation analysis; Pisces; Chlorine Organic compounds; Fullerenes; Phase partition; Kinetics; Oryzias latipes; Biological accumulation; Nanostructured materials; Organic compounds
• ISSN: 0045-6535; 1879-1298
• DOI: 10.1016/j.chemosphere.2010.05.042

The 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 −1 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.