EFFECT OF HYDROTHERMAL TREATMENTS ON ADSORPTION PROPERTIES AND STRUCTURAL CHARACTERISTICS OF CARBON SILICA ADSORBENTS (CARBOSILS)

The paper presents the effects of hydrothermal treatment of complex carbon-silica adsorbents (carbosils) on their adsorption properties and porous structures. The treatment was conducted under various conditions: temperatures ranged from 100 to 300-degrees-C and the duration from 5 to 6 h. Water and 5% peroxide solution were used as active media in the modification process. The carbosils contained 5-36 wt.% carbon. In the process of hydrothermal treatment of the carbosils, new materials were obtained, characterized by increased activity in relation to the primary unmodified carbosils in the process of physical and chemical adsorption. Hydrogen peroxide was a more active medium for the modification of the chemical and geometrical structure of the carbosils.