Abstract
In this paper commercially available activated WD-extra carbon (Gryfskand) which is applied for water treatment was used. Activted carbon was modified by the following chemical agents: H 2 O 2 , HNO 3 and HCl. The textural characteristics of the samples were determined by the analysis of physical adsorption isotherms of nitrogen vapor at 77 K. The Boehm titration general procedure was used to determine the distribution of the surface functional groups. Chemical modifications significantly affect the chemical, structural and surface properties of activated carbons. Hydrophobization with ethereal stearic acid was performed on the raw material and samples after chemical modification. Hydrophobic properties of the samples were specified. The relationship of the chemical modification agents with hydrophobization degree was indicated.
Highlights
With the increase of population and the development of the industry and energy sector the amount of pollution increases as well
The activated carbons used for the removal of pollution from solutions are characterized by high water absorption
The amount of water determined during a test carried out in this manner is adequate to the amount of water retained in the bed of activated carbon which will be generated in industrial conditions
Summary
With the increase of population and the development of the industry and energy sector the amount of pollution increases as well. Activated carbons are known to be excellent adsorbents and are used to remove a broad spectrum of dissolved organic and inorganic species from both the gas phase and liquid phase. Their effectiveness in the purification processes primarily depends on structural properties and chemical properties of the surface. The change of the hydrophobic properties of the carbon materials, which is applied during production filters for removing oil and organic pollutants [9] or in the purification processes used frying oils, is possible [10]. The activated carbons used for the removal of pollution from solutions are characterized by high water absorption It may be unfavorable during the regeneration process. Water resistance of carbons can be changed by means of the hydrophobization process [11,12,13,14]
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