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Title

Cell-wall-dependent effect of carboxyl-CdSe/ZnS quantum dots on lead and copper availability to green microalgae

Authors
Boltzman, Jonathan
Published in Environmental Pollution. 2012, vol. 167, p. 27-33
Abstract The present study examines the effect of carboxyl-CdSe/ZnS quantum dots (QDs) on Cu and Pb availability to microalgae with different cell wall characteristics: Chlorella kesslerii possessing a cellulosic cell wall and two strains of Chlamydomonas reinhardtii, a wall-less and a walled strain containing glycoproteins as the main cell wall component. Results demonstrated that QDs decreased Pb and Cu intracellular contents ({Cu}int and {Pb}int) inwalled strains by a factor of 2.5 and 2, respectively, as expected by the decrease of about 70% and 40% in the dissolved Cu and Pb concentrations. QDs increased {Cu}int and {Pb}int in wall-less strain by a factor of 4 and 3.5. These observations were consistent with the observed association of QDs to the wall-less C. reinhardtii, and lack of association to walled algal strains. Suwannee River humic acid did not influence metal association to QDs, but decreased {Cu}int and {Pb}int in all microalgae.
Keywords Carboxyl-CdSe/ZnS core/shell quantum dotsMicroalgaeBioavailability MixturesFlow field-flow fractionation coupled to ICP-MSCarrier effect
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Research group Environmental Biogeochemistry and Ecotoxicology
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WORMS, Isabelle et al. Cell-wall-dependent effect of carboxyl-CdSe/ZnS quantum dots on lead and copper availability to green microalgae. In: Environmental Pollution, 2012, vol. 167, p. 27-33. https://archive-ouverte.unige.ch/unige:23648

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Deposited on : 2012-10-31

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