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Occurrence of PBDE compounds and Bisphenol A in rivers with the occurrence of cryfish
Svobodová, Kateřina ; Vach, Marek (advisor)
The thesis deals with result evaluation of a project under the auspices of the EAA and Norway Grants, which ran from 2015 to 2016. The project's goal was to evaluate water quality at sites with native and invasive crayfish. The project also included monitoring organic substances such as Polybrominated diphenyl ethers (PBDEs). I mainly focused on a subset of PBDEs, the brominated flame retardants (BFRs). These substances have been monitored since the 1970s, when food was accidentally contaminated leading to the contamination of the nearby area in the US. What is alarming is their persistence in the environment, which leads to their constantly increasing levels. Information about the transformation and biodegradation of PBDEs in the environment is still limited and is continually analyzed in new studies. These substances are poorly volatile and insoluble, which makes dust and particles arising from the products containing BPAs the main sources of contact. Another agent, whose presence in the environment of the Czech Republic I analyzed, is Bisphenol A (BPA). BPA is used in the production of epoxy resins and polycarbonate plastics. BPA is a toxic substance with the ability to disrupt hormone function. Baby feeding bottles have been confirmed to contain these compounds. In April 2004, the Czech government approved a (program to reduce pollution of surface waters by dangerous harmful substances). In August 2004, the EU enacted a ban on the sale and use of penta-BDE and octa-BDE in all fields. Since 2011, Bisphenol A may not be used in the manufacture of baby feeding bottles. The goal of this thesis is to analyze and evaluate the amount and possible consequences of these substances in our environment, which are alarming even after full or partial bans on the use of these substances.
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