engleski

Synthesis, characterisation and aquatic ecotoxicity of the UV filter hexyl 2-(4-diethylamino-2-hydroxybenzoyl)benzoate (DHHB) and its chlorinated by-products

In this work was presented the synthesis pathway for the UV filter diethylaminohydroxybenzoylbenzoate (DHHB) and its chlorinated by-products in order to investigate the transformation behavior and toxicity changes of DHHB during chlorination disinfection treatment. The acute toxicity was measured using standardized tests with aquatic model organisms. The potency of DHHB was compared with other benzophenone-like UV filters tested in the same experimental set-up. Toxicity of chlorinated compounds tested by photobacteria was found to be in the similar range as that of the starting compound. Microalgae were more sensitive to DHHB than to its chlorinated by-products, while daphnids were affected more by DHHB's chlorinated products. The comparative toxicity data showed DHHB and even more its chlorinated by-products as highly biologically potent to daphnids than other tested UV filter. The toxic potential of benzophenone-like UV filters should be interpreted together with data on their chemical properties, chlorination effects and affected organism.

UV filters ; chlorination ; comparative toxicity ; microalgae ; daphnids

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