The fluorescence analysis of laser photolysis of phenols in water

Оцифровано в НБ ТГ

Human Urinary Epithelial Cells as a Source of Engraftable Hepatocyte-Like Cells Using Stem Cell Technology

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Photodegradation of an herbicide (2-methyl-4-chlorophenoxyacetic acid) in the presence of “TiO2, SnO2, SnO2/TiO2 nanoparticles – polypropylene fibrous carrier” systems

Using electronic spectroscopy and fluorescence techniques, the degradation of 2-methyl-4-chlorophenoxyacetic acid has been researched in water under the excitation with UV radiation produced by a KrCl excimer lamp in the presence of “TiO2, SnO2, SnO2/TiO2Nanoparticles – Polypropylene Fibrous Carrier” Systems. It has been determined that MCPA phototransformation is most efficient when using the “TiO2/SnO2heteronanoparticles – carrier” system with the concentration of 25/6 mg/g. The results indicate that systems with applied semiconductor particles do not exhibit sorption properties towards МСРА molecules. Therefore, the change in the spectral characteristics of a МСРА water solution after time-exposure and exposure to radiation is only associated with the phototransformations of non-adsorbed МСРА molecules and with the emergence of their photodegradation products.</jats:p

Fluorescence investigations of phototransformation of phenol in aqueous solutions

Оцифровано в НБ ТГ

Photodegradation of bisphenol A in the presence of superfine microfiber polypropylene

The effect of UV radiation on the efficiency phototransformation BPA in water in the presence of polypropylene superfine microfibers. The absorption and fluorescence spectra of the investigated substance with three types of PPM of various properties were obtained. After excitation with an excilamp, the main photoproduct BPA fluoresces in the region of 405÷410 nm. With an increase in the irradiation time from 0 to 10 minutes, an increase in the fluorescence intensity of this BPA photoproduct was recorded. This indicates that in the course of irradiation, effective photodegradation of the initial toxicant occurs and a photoproduct is formed. In the course of irradiation, the degradation of the resulting photoproducts occurs, which is associated with their adsorption on the surface of the PPM

Phototransformation of bisphenol a in water in the presence of materials based on ultrafine polypropylene fibers

The effect of UV radiation on the efficiency of bisphenol A (BPA) phototransformation in water in the presence of polypropylene nonwoven material based on ultrafine fibers has been studied. The absorption and fluorescence spectra of the investigated substance with fibers of different properties have been obtained. After excitation with an excilamp, the main photoproduct - BPA - fluoresces in the region of similar to 408 nm. With an increase in the irradiation time from 0 to 10 min, the fluorescence intensity of this photoproduct increases. The absorption and fluorescence spectra of cyclohexane containing compounds desorbed from the fiber surface indicate the adsorption of the photoproduct on its surface during UV irradiation

Fluorescence investigations of phototransformation of phenol in aqueous solutions

Оцифровано в НБ ТГ

The fluorescence analysis of laser photolysis of phenols in water

Оцифровано в НБ ТГ