Abstract
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 mediumpressure 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.
Highlights
Organic environment micro-pollutants are a global challenge related to water quality
This paper presents results of studies on the heterogeneous photocatalysis of organic phenylbenzimidazole-5-sulfonic acid (PBSA) UV filter under various experimental conditions in the presence of UV irradiation
Materials and methods Materials All chemicals were purchased from commercial suppliers and used without purification. 2 phenylbenzimidazole 5 sulfonic acid (PBSA, CAS: 5466-77-3) was obtained from Sigma-Aldrich (USA)
Summary
Organic environment micro-pollutants (emerging pollutants) are a global challenge related to water quality. These substances have been identified in the environment but they are not included in routine environmental monitoring programs. Their fate in the environment and ecotoxicological impact on living organisms are unknown [1]. One of the components of personal care products are UV filters. These compounds are mainly used in sun creams and other cosmetic preparations (lipsticks, make-up agents, lotions, shampoos) protecting people against the harmful effects of UV radiation [3]
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