Plastic nanoparticles in water - dissertation on Thursday 19 May
On Thursday May 19 Karin Mattsson (Department of Chemistry) is defending her thesis within Environmental Science: "Nanoparticles in the aquatic environment, Particle characterization and effects on organisms."
Time and place: 10:00 in the Blue Hall, Ecology Building, Sölvegatan 37, Lund.
About the thesisThis thesis explores the effect of nanomaterials in aquatic systems. We have studied the effects of size and surface chemistry for nanoparticles as well as the effect Daphnia magna filtration has on nanomaterials. We delivered plastic nanoparticles to fish through a natural food chain, from algae through Daphnia and show that the nanoparticles are transported through the food chain and affect the fish behavior, metabolism and brain. Moreover, we show that nanomaterials can pass biological barriers. We exposed Daphnia magna to NWs with two different diameters (40 and 80 nm respectively) and similar lengths and found that the NWs can pass the epithelium membrane and that the 40 nm NWs do it to a greater extent. We also show thatplastic nanoparticles transported through a food chain can pass the blood-brain barrier in fish.