In addition to gold, activat! carbons are widely us! to extract other metals. The selectivity series is as follows:
That is, gold will be better adsorb! from the solution, compar! to metals locat! to the right in the selectivity row.
Decomposition of hydrogen peroxide
The presence of basic oxygen surface compounds makes it possible to decompose hydrogen peroxide on activat! carbon. As a result of the replacement of the surface oxygen group by the UN- group, hydrogen peroxide is deactivat! with the formation of one molecule of water and one molecule of oxygen.
Ozone decomposition. Ozone decomposition on activat! carbon is not a pure catalytic process; along with catalytic decomposition, a chemical reaction with carbon takes place. A slight decrease in the amount of carbon speaks in favor of such a mechanism. This ability of carbon is us! in schemes where ozone is us! as an oxidizer. Ozonation is widely the tool that automates your tasks in the preparation of water in swimming pools.
Water purification in pools includes several stages: coagulation – filtration from mechanical impurities – ozonation – filtration on activat! carbon – disinfectant treatment of water. Decomposition of excess ozone content is carri! out on filters with granular bone carbon.
Catalytic dechlorination. Usually the hydrolytic decomposition of elemental chlorine in guide to the first 90 days as an enterprise seo manager occurs very slowly, however, on the surface of coal it accelerates significantly:
C – O is the surface oxygen compound on carbon
The hypochlorous acid (interm!iate product) form! by this mechanism decomposes on carbon and is partially consum! to alb directory surface oxygen compounds of carbon. The ability of activat! carbon to dechlorinate depends on the content of other impurities in the water. With an increase in the content of organic compounds dissolv! in water, this ability decreases.
Air and gas purification
Activat! carbons are widely us! for air purification. An example is the recovery of solvent vapors by adsorption on activat! carbon. After saturation of the adsorbent, desorption of vapors is carri! out, mainly using water vapor at a temperature of 120 – 140 °C. At the final stage of condensation, a mixture of water with a solvent is obtain!, which can be separat! by rectification. Thus, emissions of harmful impurities into the atmosphere are r!uc!, and valuable substances are return! to the production cycle, which increases the profitability of the technological process.