The adrorptkn of NH, on Davkon rWca gel was studled at 298, 313, and 333 K by wlng a packed bed method.Equiliklwn koth" were calculated from the adsorption data and were modeled by the Langmuh and mod#led Polanyl potentla1 equathw. ExperkrrcMtsl breakthrough curves were obtalned for dx concentrattons of NH, In dry helium gas at each temperature. The Isosterk heats of adrorption were also cakulated at three ad8orbent loadand were found to be nearly Mepmdmt of loadlng. A calculated heat of ackorpllon of the same order of msgnlhrde as the heai of condenmtkn lndkated that the adeorptlon was prhnarlly due to phydcal forces.

A survey of indoor air pollutants was conducted. The removal of six chlorinated hydrocarbons. including methyl chloride, methylene chloride, chloroform. carbon tetrachloride, 1.1.1-trichloroethane, and tetrachloroethylene was performed using adsorption methods. The equilibrium uptakes of the six indoor pollutants on silica gel were determined gravimetrically at 25°C and at pressures up to saturation. The modified potential theory proposed by Dubinin and coworkers was used to correlate the adsorption data.

No abstract