Research On Adsorption Of Phenol On Activated Carbon Fibers And Modification Of Activated Carbon Fibers

The chlorophenol wastewater is harm to environment and living creature seriously from chemical and medical factories. With environmental protection asked more seriously, we pay more attention to treatment in chlorophenol wastewater. Activated carbon fibers(ACF) is used as a new kind of fibrous adsorbent which was developed by carbonization and activation of organic fibers. ACF has advantage of high adsorption properties because of its specific surface area, pore diameter, pore size distribution and surface chemical structure.We used activated carbon fibers(ACF) to treat phenol wastewater. Adsorption isotherm of phenol on activated carbon fibers was studied on different temperature and PH conditions. In the experiment of the adsorption properties, we studied the adsorption rate line on activated carbon fibers and compare adsorption isotherm of ACF with granular activated carbon(GAC) and powdery activated carbon(PAC). Activated carbon fibers were regenerated by sodium hydroxide and the regeneration stability of ACF is fine.In order to improve adsorption properties of phenol on ACF, ACF was modified by nitric acid and cerous sulfate. It is concluded that the adsorption property of phenol on ACF was advanced by modification with cerous sulfate. We also studied the effects of factors on adsorption such as temperature, PH and regeneration ability. Characteristics of adsorption of phenol were investigated in modified ACF. The results showed that isotherm adsorption of phenol was best described by Langmuir and Freundlich equations. Specific surface area and pore diameter distribution and surface structure based on BET and SEM indicates that Ce-treatment can evidently increase the adsorption properties of ACF.