[bor-50]

ADSORPTION OF PHENOL ON MODIFIED CARBON FIBER FROM AQUEOUS SOLUTION
Bocharnikov VA1*, Pakhomov D2, Dmitriev AV2, Soldatov AI3
1Ugra State University, Khanty-Mansiysk, Russia
2Chelyabinsk State University, Chelyabinsk, Russia
3South Ural State University, Chelyabinsk, Russia
E-mail bor-50@mail.ru
Adsorption of phenol on graphite carbon fiber based on polyacrylonitrile. The surface of the carbon fibers modified by boiling in water, alkali solution and acid solution.
Adsorption of phenol was carried out at room temperature with an equal weight ratio of the fiber sample and the solution of phenol. The concentration of phenol in water have been chosen so that it would significantly greater than the value permissible sanitary norms. The concentration of phenol in the solution after adsorption was determined by fluorescence spectroscopy. The specific surface of the fiber was determined breathability by the cylindrical samples consisting of crushed carbon fiber. Another method is to measure the diameter of the fibers in electron micrographs. Both methods gave converging results.
Fiber density was determined by pycnometric.
In all cases, the adsorption of phenol on a carbon fiber satisfactorily described by the Langmuir equation, which was calculated based on the value of limiting adsorption. The concentration of phenol in the solution after adsorption using all three types of fibers meet sanitary standards. When using fibers, boiled in water and reducing the concentration of the alkali solution after the adsorption of phenol on the fiber was almost identical. Modification of the fiber with the acid solution to increase the limiting adsorption of phenol on the order of two fiber relative to the other two methods of modification.
It was established that the adsorption of phenol on the carbon fiber is described first order kinetic equation.