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Removal of 2-phenylbenzimidazole-5-sulfonic acid using heterogeneous photocatalysis

Studziński W., Gackowska A.

Acta Innovations

2018

no. 28

5--13

UV filters are classified as environmental pollutants (emerging pollutants). One of the most frequently detected UV filters in real samples is 2-phenylbenzimidazole-5-sulfonic acid (PBSA). It has been shown that conventional technologies applied in sewage treatment plants are not adapted for complete removal of sunscreen agents. Therefore, there is a trend to undertake activities leading to improvement of water quality by enhancing treatment methods. This is important due to the fact that in an aqueous environment, in the presence of UV radiation or sunlight irradation, PBSA generates reactive oxygen species that can damage the DNA of living organisms. The aim of study was to investigate an effect of pH and TiO2 on PBSA stability in the presence of UV radiation. It was found that the rate of PBSA degradation depends on the catalyst dose and pH of solution. The photocatalysis reaction was carried out in a Heraeus laboratory exposure set equipped with a 150 W medium pressure mercury lamp. The course of PBSA degradation process as a function of time was monitored using UV/VIS spectrophotometer and liquid chromatograph equipped with UV-Vis detector.

Effect of various agents on stability of 2-phenylbenzimidazole-5-sulfonic acid

Studziński W., Karczmarek A.

Acta Innovations

2017

no. 25

5--12

The subject of this study is 2-phenylbenzimidazole-5-sulfonic acid (PBSA), which is one of 26 filters used for personal protection in the European Union. The aim of the study was to investigate the stability of 2- phenylbenzimidazole-5-sulfonic acid and its sodium salt under the influence of various agents. The study has shown that UV radiation, pH value, hydrogen peroxide are important factors limiting the stability of PBSA. The significance of the study is expanding the knowledge about the stability of PBSA.

Zastosowanie 1,3-arylowych pochodnych 1,3-propanodionu i ich chelatów w technologii polimerów

Jakubowski B.

Chemik

2007

Vol. 60, nr 5

275-279

Przedstawiono zastosowanie l,3-ary Iowych pochodnych l ,3propanodionu, ich soli i chelatów z metalami w technologii polimerów. Związki te są stosowane gfównie jako specjalistyczne dodatki do tworzyw polimerowych i po-wiok. Szerzej omówiono zastosowanie tych związków jako kostabilizatorów w procesach termicznej.obróbki halogenowanych polimerów.

The applications of 1,3-diaryl derivatives of 1,3-propandione, their salts and chelates with metals in polymer technology were presented. These compounds are used mainly as additives to poiymers and coatings. Their activity as costabilizers in thermal processes of halogenated polymers are discused widely.