## 3 Results and Discussion
### Pollutant Disappearance Experiments
#### 3.1.4. Surfactant Degradation
versicolor_ DSM (both parts of the neonol molecule), and _S. commune_ (the most active degrader of isonylphenol). In the IR spectra of samples, the degradation of neonol _P. ostreatus_ Florida (Figure S1) mutually altered the intensity of the absorption bands in the 2958 and 2926 cm\({}^{-1}\) region, corresponding to the antisymmetric and symmetric CH vibrations of the alkyl chain, and 2874 and 2858 cm\({}^{-1}\), corresponding to antisymmetric and symmetric CH aromatic rings. It indicates an increase in the fraction of absorption of the latter. This fact is also supported by an increase in the intensity of deformation bands at 1453 cm\({}^{-1}\) and skeletal vibrations at 1252 cm\({}^{-1}\) alkyl fragments. Some authors associate an increase in absorption at 1252 cm\({}^{-1}\) with the formation of aromatic esters during the degradation of alkylphenols. In addition, there is a significant increase in band absorption at 1402 cm\({}^{-1}\), which is associated with the deformation vibrations of the OH group, and the increase in intensity usually indirectly indicates the formation of hydrogen bonds, which indicates the appearance in the medium of polar components originating from the original neon by shortening the hydroxyethyl fragment. The notable changes in the IR spectra of samples obtained after neonol degradation by _S. rugosoanulata_ (Figure S2) were revealed. The wide absorption band of OH groups at 3365 cm\({}^{-1}\) shows a shift of about 80 cm\({}^{-1}\) toward higher frequencies. It indicates the degradation of some hydrogen bonds and a certain increase of the proportion of hydrophobic components. The absorption bands of antisymmetric and symmetric vibrations of alkyl fragments at 2974 and 2927 cm\({}^{-1}\), respectively, become more pronounced compared to the spectra of control treatment. Two bands in the region of symmetric and antisymmetric vibrations of C-H in aromatic rings degenerate into one, broadened with a maximum at 2883 cm\({}^{-1}\) after degradation. It is also characteristic of stretching vibrations of C-H-saturated hydrocarbons. The intense absorption at 881 cm\({}^{-1}\), which is characteristic of 1,4-disubstituted benzes, completely disappears, while the intensity of the stretching vibrations of the C-OH end groups of polyoxyethyl substituents at 1049 and 1089 cm\({}^{-1}\) decreases significantly. In addition, there is a pronounced absorption at 1115 cm\({}^{-1}\), characteristic of acetals. These data can show the destruction of aromatic rings during the degradation of neonol. of CH of aromatic rings at 2874 and 2860 cm\({}^{-1}\), become less intense compared to the control spectra. There is also a decrease in the intensity of the bands attributable to the vibrations of the C-O-C groups of the hydroxyethyl fragment at 1037 and 1106 cm\({}^{-1}\), as well as the absorption bands characteristic of the deformation vibrations of the CH groups of alkyl chains. The appearance of an absorption band at 1294 cm\({}^{-1}\), which is associated with dimers of carboxylic acids, is noteworthy. The appearance of carboxylic acids can be explained by oxidative degradation of aromatic rings of alkylphenols. Thus, based on the spectral data, it is possible to draw a conclusion about the most probable destruction of some of the neonol molecules affecting both aromatic rings and polyoxyethyl fragments. Isonomylphenol is a product of incomplete degradation of oxyethylated alkylphenol. Since the structure of isonomylphenol does not include polyoxyethyl substituents and has free phenolic hydroxyl, IR spectra of the isonomylphenol and neonol differ significantly due to the manifestation of the isonomyl substituent bands. There is an intense absorption in the isonomylphenol spectrum in the form of a somewhat broadened peak at 1456 cm\({}^{-1}\), which refers to the deformation vibrations of methylene units, and intensive absorption at 1379 cm\({}^{-1}\), related to the vibrations of the isopropyl fragment. The vibrations of the aromatic ring are more vivid and intensive at 1596 and 1513 cm\({}^{-1}\).