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 ca rbon-silica adsorbents (carbosils) on their adsorption properties and porous structures. The treatment was conducted under various condition s: 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. I n the process of hydrothermal treatment of the carbosils, new material s were obtained, characterized by increased activity in relation to th e primary unmodified carbosils in the process of physical and chemical adsorption. Hydrogen peroxide was a more active medium for the modifi cation of the chemical and geometrical structure of the carbosils.