Effective sorbents are used to address the issues of improving food safety. The economic feasibility of cleaning increases when using food production wastes as sorbents. With the help of modern methods were studied the composition and properties of the sorbent ADC obtained from rice husk. Sorbent is a type of pyrogenic silica. With the help of modern methods for assessing the quality of substances, the chemical composition and morphological features of the surface of the sorbent were studied. In addition, the static exchange capacity for various pollutants was investigated. It is established that the ADC well detains inorganic compounds, which included iron, manganese and aluminum. Desorption of chemical compounds from the used sorbent does not have a significant effect on the content of heavy metals in water. This indicates the strength of sorption bonds. To establish the nature of the moisture in the sorbent with the determination of temperature intervals at which dehydration occurs, a simultaneous thermal analysis was carried out, which allowed determining the temperature zones that correspond to moisture removal, moisture removal with different binding energy, and predict the mode parameters of the moisture removal process and select the most effective way to remove them. dehydration. The operation of the device used is based on the continuous recording of the dependence of the change in mass of the material on time or temperature when it is heated in accordance with the selected temperature program in a given gas atmosphere. At the same time, the release or absorption of heat by the sample due to phase transitions or chemical reactions was recorded. Investigations were carried out under the following conditions: pressure — atmospheric, maximum temperature 600 K, rate of change of temperature 5 °C/min. The experiments were carried out in aluminum crucibles with a total weight of 10 mg. The analysis made it possible to identify periods of dehydration of water during thermal effects on the ADC, as well as to identify temperature zones that correspond to the release of moisture with different shapes and binding energy.

sorbent, silicon dioxide, heavy metals, moisture, thermal analysis

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