Abstract
As a consequence of the increasing use of engineered nanoparticles in e.g. industrial applications
and consumer products, these particles will be released into the aquatic environment. They will
be present in the water phase where they are likely to form aggregates/agglomerates. Through
sedimentation, the sediments are expected to be a sink for nanoparticles. Both in the water phase
and in sediments they will mix and interact with other environmental pollutants, including
heavy metals. In this study the toxicity of cadmium to three relevant freshwater species, green
algae Pseudokirchneriella subcapitata, crustacean Daphnia magna and sediment organism Lumbriculus
variegatus, was investigated both in the absence and presence of TiO2 nanoparticles.
Also uptake of cadmium in D. magna and L. variegatus was investigated in tests where organisms
were exposed to cadmium in sublethal concentrations in the absence and presence of 2mg/L
TiO2 nanoparticles (P25 Evonic, d: 30 nm). Mass balances for cadmium in the test systems
were determined. A high degree of sorption of cadmium onto TiO2 particles was found, which
makes TiO2 nanoparticles potential carriers for cadmium. The observed toxicity was higher than
expected based on water phase cadmium concentrations, and results shows that adsorbed fraction
of cadmium is bioavailable.
Original language | English |
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Title of host publication | SETAC Europe 21st Annual Meeting Abstract Book |
Number of pages | 235 |
Publication date | 2011 |
Publication status | Published - 2011 |
Event | SETAC Europe 21st Annual Meeting: Ecosystem Protection in a Sustainable World: A Challenge for Science and Regulation - Milano Convention Centre, Milano, Italy Duration: 15 May 2011 → 19 May 2011 Conference number: 21 http://milano.setac.eu/home/?contentid=291&pr_id=290 |
Conference
Conference | SETAC Europe 21st Annual Meeting |
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Number | 21 |
Location | Milano Convention Centre |
Country/Territory | Italy |
City | Milano |
Period | 15/05/2011 → 19/05/2011 |
Internet address |