Ordered mesoporous C materials were prepd. by hard template method and treated with HNO3 at 70 or 100 degrees C under wet oxidn. conditions to study the structure changes and generated surface functionalities. The materials produced were used for removal of auramine-O dye from aq. solns. The highest adsorption capacity was obsd. for the material oxidized with 5M HNO3 at 100 degrees C.