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Photocatalytic Removal of Emerging Pollutants
Autoři: Trousil Vojtěch | Blažková Zuzana | Palarčík Jiří | Machalický Oldřich | Cakl Jiří
Rok: 2017
Druh publikace: ostatní - článek ve sborníku
Název zdroje: Proceedings of the 5th International Conference on Chemical Technology
Název nakladatele: Česká společnost průmyslové chemie
Místo vydání: Praha
Strana od-do: nestránkováno
Tituly:
Jazyk Název Abstrakt Klíčová slova
eng Photocatalytic Removal of Emerging Pollutants Emerging pollutants belong to the substances that are not normally monitored, but their adverse effects may be significant. Pharmaceutical residues are continuously released to the waterways due to incomplete elimination in wastewater treatment plants. Diclofenac and naproxen are classified to the class of nonsteroidal anti-inflammatory drugs. Due to its relatively high lipofillity and presence of chlorine atom of diclofenac, biodegradability of these substances is relatively low. On the other hand, products emerged during its solar photolysis are often more toxic than parent compound. Diclofenac and naproxen (both 500 μg/l) were removed by heterogeneous photocatalysis in 4L borosilicate batch reactor. As a UV source, UV-LED diodes were used. Its photon flux was determined by ferrioxalate actinometry and peak emission by fluorescence spectrophotometry (PTI, USA). In case of heterogeneous photocatalysis, type of catalyst and its loading were evaluated for reaching best experimental conditions. Also experiments with optimal pH were evaluated. Samples were preconcentrated (Oasis HLB, Waters, USA) and analysed by HPLC. Also toxicity of diclofenac and naproxen were explored before and after after UV photolysis and heterogeneous photocatalysis. Growth inhibition of the fresh water alga Parachlorella kessleri was evaluated by chlorophyll extraction and its determination by UV/Vis spectrophotometer. Diclofenac; naproxen; heterogeneous photocatalysis

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