Comprehensive wastewater treatment from various pollutants is an urgent problem, and the development of new sorbents is of great scientific and practical importance. Sorbents based on sapropel were obtained: thermally oxidized sapropel, humic acids isolated from sapropel, thermally oxidized sapropel modified with humic acids, organomineral composite material based on thermally oxidized sapropel and bentonite. Resorcinol adsorption from model solutions with concentrations from 1 · 10-5 to 1 · 10-2mol/dm3 onsapropel-based sorbents was carried out under static conditions at a ratio of 1 g of sorbent per 200 cm3 of solution. It is shown that the limiting stage of resorcinol adsorption onsapropel-based sorbents is mixed diffusion. The adsorption theories of Langmuir, Freundlich, Brunauer–Emmett–Teller (BET) and Dubinin–Radradkevich are applicable to describe the resorcinol adsorption onsapropel-based sorbents. Taking into account the values of the activation energy and thermodynamic parameters of resorcinol adsorption, the obtained sapropel-based sorbents can be considered as the mechanism of resorcinol adsorption on the surface and physical adsorption due to volumetric filling of micro- and mesopores, as well as cavities. Resorcinol can also form covalent and hydrogen bonds with silicate and aluminosilicate groups, and hydrogen bonds with amino groups with sapropel-based sorbents. Therefore, it is quite difficult to separate the contribution of physical adsorption and possible chemical interactions of functional groups of sapropel-based sorbents with resorcinol. Limiting values of resorcinol adsorption onsapropel-based sorbents calculated by the BET equation (0.25–1.00 mmol/ g) and the Dubinin–Radushkevich equation (0.52–2.60 mmol/g), comparable to other developed sorbents.

Определение подлинности (аутентичности) молока является важным и актуальным вопросом не толь- ко для производителей и потребителей, но и для регулирующих органов. Современные аналитические методы об- наружения фальсификации молока медленны, трудоемки и непрактичны для использования в молочной промыш- ленности. Проведена оценка возможности применения инфракрасной спектроскопии с преобразованием Фурье для получения инфракрасных спектров (ИК-спектров) и использования особенности их структуры для аутентифи- кации коровьего молока, произведенного в разных регионах. Объектом исследования были образцы пастеризован- ного коровьего молока с массовой долей жира 2,5% из различных экогеографических районов России. Получены и проанализированы ИК-спектры образцов с преобразованием Фурье с точки зрения потенциала применения ме- тода для аутентификации. Измерения проводили с использованием ИК Фурье-спектрометра ФСМ 2201 в диа- пазоне длин волн от 7000 до 400 см–1. Три копии каждого образца анализировали в рандомизированном порядке на носителе образца (пластины ZnSe), спектры собирали с разрешением 4 см–1. Полученные ИК-спектры наблюда- ли на основе развития пиков в разных областях волновых чисел. Выявлены специфические участки ИК-спектров, характеризующие особенности коровьего молока в зависимости от региона его производства. Таким образом, метод ИК Фурье-спектроскопии с использованием хемометрии при формировании достаточной базы данных перспекти- вен в качестве альтернативного метода для рутинного анализа при контроле подлинности происхождения молока. Determination of milk authenticity is an important and relevant issue not only for producers and consumers, but also for regulatory authorities. Current analytical methods for detecting milk adulteration are slow, labor-intensive, and impractical for use in the dairy industry. The article evaluates the possibility of using Fourier transform infrared spectroscopy to obtain infrared spectra (IR spectra) and use their structural features to authenticate cow’s milk produced in different regions. The study subjects were pasteurized cow’s milk samples with a fat content of 2,5% from different ecogeographical regions of Russia. Fourier transform IR spectra of the samples were obtained and analyzed from the point of view of the potential of using the method for authentication. The measurements were performed using an FSM 2201 IR Fourier spectrometer in the wavelength range from 7000 to 400 cm–1. Three copies of each sample were analyzed in a randomized order on the sample carrier (ZnSe plates), the spectra were collected with a resolution of 4 cm–1. The obtained IR spectra were observed based on the development of peaks in different wavenumber regions. Specifi c areas of the IR spectra were identifi ed that characterize the features of cow’s milk depending on the region of its production. Thus, the method of IR Fourier spectroscopy using chemometrics, when forming a suffi cient database, is promising as an alternative method for routine analysis in monitoring the authenticity of milk origin.