EFFECT OF VARIOUS FLUORIDE ATOM SPECIES OF ACTIVATED CARBON IN CF4 PLASMA ON RECOVERY OF TRICHLOROETHYLENE

The surface modification of activated carbon using low temperature pla sma of tetrafluoromethane was investigated to evaluate the removal of trichloroethylene. The plasma-treated, activated carbon underwent an i mmersion water and/or heat-treatment. The adsorption isotherms of tric hloroethylene onto the activated carbons were measured to elucidate th e relationship between the adsorption behavior of trichloroethylene an d the introduced fluoride atoms. The trichloroethylene adsorption site s on plasma-treated, activated carbon are related to the fluoride atom species of the adsorption type, that is, the ion type.