Effect of silver nanoparticles on the marine environment - Virginia Echavar…


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Presentation at the Centre for Marine Biodiversity and Biotechnology Away Day 2012, by PhD student Virginia Echavarri Bravo

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Effect of silver nanoparticles on the marine environment - Virginia Echavar…

  1. 1. The accumulation of AgNPs in the receiving estuarine environment couldnegatively affect the functioning of resident bacterial communities?Virginia Echavarri PhD studentSupervised by Mark Hartl & Lynn Paterson Why silver nanoparticles Why bacteria? (Fig.1) ? Incorporation in Estuarine bacterial wide range of products communities play an owing to their important role in antibacterial properties. Fig.1 AgNPs used in the current biogeochemical project. Joint Research Centre (JMR) & processes affecting food Institute for Health and Consumer Protection web chain, nutrient cycle (Fig. 2) and water quality. Fig. 2 Microbial loop. Aims of the research project http://www.com.univ-mrs.fr Investigating the effects Minimum inhibitory on nutrient cycle and concentration of AgNPs water quality with a (MIC) investigated with microcosm toxicity tests developed approach (Fig.3) to with bacteria isolated model natural from the Firth of Forth conditions of the estuary. Fig.3 Microcosm set up with estuary. polypropylene (PP) buckets. Preliminary conclusions ApplicationThe toxicity of AgNPs is species specific. Antimicrobial Support of the environmental policy decision making.mechanisms could be bacteriostatic at MIC. Guidance to apply a strict and coherent riskMicrocosm approach allows to monitor the impact of assessment framework for silver-containing materialsAgNPs in a short period of time.