nanoparticles Archives - One Earth - One Ocean e. V. https://oneearth-oneocean.com/tag/nanoparticles/ Mon, 14 Apr 2014 20:21:10 +0000 de-DE hourly 1 https://wordpress.org/?v=6.5.5 https://oneearth-oneocean.com/wp-content/uploads/2022/08/cropped-oeoo-logo-unterzeile-blau-1-32x32.jpg nanoparticles Archives - One Earth - One Ocean e. V. https://oneearth-oneocean.com/tag/nanoparticles/ 32 32 Strong sorption of PCBs to nanoplastics, microplastics, carbon nanotubes and fullerenes https://oneearth-oneocean.com/research/2014/strong-sorption-of-pcbs-to-nanoplastics-microplastics-carbon-nanotubes-and-fullerenes/ https://oneearth-oneocean.com/research/2014/strong-sorption-of-pcbs-to-nanoplastics-microplastics-carbon-nanotubes-and-fullerenes/#respond Mon, 14 Apr 2014 20:21:10 +0000 http://www.oneearth-oneocean.com/kb/?p=470 http://pubs.acs.org/doi/abs/10.1021/es405721v Ilona Velzeboer, Christiaan Kwadijk, and Albert Aart Koelmans Strong sorption of PCBs to nanoplastics, microplastics, carbon nanotubes and fullerenes Environ. Sci. Technol., Just Accepted Manuscript DOI: 10.1021/es405721v Publication Date (Web): April 1, 2014 Abstract The presence of microplastic and carbon-based nanoparticles in the environment may have implications for the fate and effects of traditional hydrophobic chemicals. Here we present parameters for the sorption of 17 CB congeners to 10-180 µm sized polyethylene (micro-PE), 70 nm polystyrene (nano-PS), multiwalled carbon nanotubes (MWCNT), fullerene (C60) and a natural sediment, in the environmentally relevant 10-5 to 10-1 ?g L-1 concentration range. Effects of salinity and sediment organic matter fouling were assessed by measuring the isotherms in fresh- and seawater, with and without sediment present. Sorption to the ?bulk? sorbents sediment organic matter (OM) and micro-PE occurred through linear hydrophobic partitioning with OM and micro-PE having similar sorption affinity. Sorption to MWCNT and nano-PS was non-linear. PCB sorption to MWCNT and C60 was 3 to 4 orders of magnitude stronger than to OM and micro-PE. Sorption to nano-PS was 1 to 2 orders of magnitude stronger than to micro-PE, which was attributed to the higher aromaticity and surface-volume ratio of nano-PS. Organic matter effects varied among sorbents, with the largest OM fouling effect observed for the high surface sorbents MWCNT and nano-PS. Salinity decreased sorption for sediment and MWCNT, but increased sorption for the polymers nano-PS and micro-PE. The exceptionally strong sorption of (planar) PCBs to C60, MWCNT and nano-PS may imply increased hazards upon membrane transfer of these particles. http://pubs.acs.org/toc/esthag/0/ja

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]]> http://pubs.acs.org/doi/abs/10.1021/es405721v Ilona Velzeboer, Christiaan Kwadijk, and Albert Aart Koelmans Strong sorption of PCBs to nanoplastics, microplastics, carbon nanotubes and fullerenes Environ. Sci. Technol., Just Accepted Manuscript DOI: 10.1021/es405721v Publication Date (Web): April 1, 2014 Abstract The presence of microplastic and carbon-based nanoparticles in the environment may have implications for the fate and effects of traditional hydrophobic chemicals. Here we present parameters for the sorption of 17 CB congeners to 10-180 µm sized polyethylene (micro-PE), 70 nm polystyrene (nano-PS), multiwalled carbon nanotubes (MWCNT), fullerene (C60) and a natural sediment, in the environmentally relevant 10-5 to 10-1 ?g L-1 concentration range. Effects of salinity and sediment organic matter fouling were assessed by measuring the isotherms in fresh- and seawater, with and without sediment present. Sorption to the ?bulk? sorbents sediment organic matter (OM) and micro-PE occurred through linear hydrophobic partitioning with OM and micro-PE having similar sorption affinity. Sorption to MWCNT and nano-PS was non-linear. PCB sorption to MWCNT and C60 was 3 to 4 orders of magnitude stronger than to OM and micro-PE. Sorption to nano-PS was 1 to 2 orders of magnitude stronger than to micro-PE, which was attributed to the higher aromaticity and surface-volume ratio of nano-PS. Organic matter effects varied among sorbents, with the largest OM fouling effect observed for the high surface sorbents MWCNT and nano-PS. Salinity decreased sorption for sediment and MWCNT, but increased sorption for the polymers nano-PS and micro-PE. The exceptionally strong sorption of (planar) PCBs to C60, MWCNT and nano-PS may imply increased hazards upon membrane transfer of these particles. http://pubs.acs.org/toc/esthag/0/ja

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