photocatalytic decomposition of low-concentrated trichloroethylene and tetrachloroethylene in water

the photocatalytic decomposition of trichloroethylene (tce) and tetrachloroethylene (pce)in water was studied. tce and pce were present in water at very low concentrations of about 15 μg/dm3. thisconcentration level corresponds to the one occasionally occurring in groundwater. results of this researchconfirmed usefulness of the photocatalytic process for successful removal of low-concentrated tce and pcefrom water. removal of trichloroethylene and tetrachloroethylene from water can be achieved by applicationof the photocatalytic process over titanium dioxide. it was confirmed that both suspended and immobilizedmodes of the photocatalytic process give comparable results. therefore it is recommended to employ theimmobilized system as more beneficial from the economical point of view. presented studies revealed that very low amounts of tce and pce can be removed from water using the photocatalytic process. this methodcould be than applied for purification of groundwater occasionally polluted with the small amounts of tceand pce.