Physical Chemistry of Virus Adsorption and Degradation on Inorganic Surfaces - Its Relation to Wastewater Treatment

摘要

The DLVO-Lifshitz theory of colloid stability is applied to adsorption of poliovirus on oxide surfaces common in soil and aquatic environments. Excellent agreement was found between colloid stability theory and adsorption free energies calculated from mass-action principles. Colloid stability theory now provides an organized frame of reference with which to understand virus adsorption in the environment. On some surfaces, notably beta-MnO2, CuO, and Al metal, kinetic analysis of data from multiple extractions and sedimentation analysis reveals that virus was actually degraded by adsorption. A column experiment also indicated that Al metal also effectively degraded virus in the presence of secondary wastewater effluent. Potential applications to wastewater treatment are suggested.