Ecotoxicity of river sediments: invertebrate community, toxicity bioassays and the Toxic Unit approach as complementary assessment tools Núria de Castro-Català, Maja Kuzmanovic, Neus Roig, Jordi Sierra, Antoni Ginebreda, Damià Barceló, Sandra Pérez, Mira Petrovic, Yolanda Picó, Marta Schumacher and Isabel Muñoz
33
Embed
Ecotoxicity of river sediments: invertebrate community, toxicity bioassays and the Toxic Unit approach as complementary assessment tools
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
Ecotoxicity of river sediments:
invertebrate community, toxicity
bioassays and the Toxic Unit approach as
complementary assessment tools Núria de Castro-Català, Maja Kuzmanovic, Neus Roig, Jordi Sierra, Antoni Ginebreda, Damià
Barceló, Sandra Pérez, Mira Petrovic, Yolanda Picó, Marta Schumacher and Isabel Muñoz
INTRODUCTION
Sediment quality is crucial to the health of an aquatic
ecosystem.
Efficient extraction technologies and liquid chromatography
mass spectrometry (LC-MS)
Picó et al. 2015 Anal Bioanal Chem
INTRODUCTION
Chemical concentrations alone are insufficient to
demonstrate adverse environmental effects because they
do not provide evidence of toxicity
Bioavailability depends upon hydrological conditions,
sediment composition, organic matter content, ...
Different modes of action, different sensitivities of the
organisms
OBJECTIVES Multi-stressed river basins from the Iberian Peninsula
4 – 5 sampling sites in each River
OBJECTIVES
Pollutants
Toxicity
What kind of toxicity?
How much?
Pollutants
Organic compounds:
POPs, Pests, PhACs, EDCs, PFCs
OBJECTIVES
POPs (Persistent Organic Pollutants)
PAHs (Polycyclic aromatic hydrocarbons):
- fossil fuels and in tar deposits
- result of incomplete combustion of organic matter
PCBs (Polychlorinated biphenyls):
- used as dielectric and coolant fluids
- banned by the United States Congress in 1979 and by the
Stockholm Convention on Persistent Organic Pollutants in 2001.
EDCs (Endocrine Disrupting Compounds)
Azoles corrosion inhibitors
Bisphenol A
Parabens
preservatives in cosmetics and pharmaceuticals
Estrogens
Alkylphenols detergents, fuels and lubricants,
phenolic resins, fragrances, antioxidants, oil field
chemicals and fire retardant materials
Others…
PFCs (Perfluorinated compounds)
used in textiles and food packaging due to their unique
properties as repellents of water and oils
also used as surfactants and lubricants in fire-fighting foams,