| Popis: |
The novel coal adsorbents based on Angren coal have been elaborated. They are the following: a) composite material obtained by addition in coal carbonates of alkaline-earth metals, allowing to rise sorption capacity adsorbent by 70-80% and use it can be used for sewage purification from some ions of inorganic impurities and decreasing of the water rigidity from 16.4 to 0.5 mg∙eq/l; b) heat-treated at 550 °C, with hydrophobic properties (wetting angle α = 99°), a porosity of 30%, capacity to kerosene to 25% and the specific surface to 150 m 2/g which are suitable for purification of waste surface from oil-products; c) the activated coal, obtained by treatment of granular coal by water vapor at 800 °C, with the activity by the methylene blue is not less than 225 mg/g, the specific surface more 700 m 2/g and they can be used in the processes of waste purification from some dissolved organic impurities; d) oxidized by air at 180-200 °C (pre-heated Angren coal at 550 °C) with a high ion selectivity, capacity of 1.8 mg∙eq/g and these adsorbents can be used for waste purification from some inorganic micro impurities. |
