(225a) Fundamental Developments and Economic Feasibility of AOPs Involving Ultrasound for Environmental Remediation

Recently, advanced oxidation processes (AOPs) have found world-wide applications for water treatment and environmental remediation and control of air toxics. AOPs involving sonochemistry (i.e., ultrasound), combinative sonophotochemical, sonophotocatalytic and sonoelectrochemical processes, hydrodynamic cavitation, persulfate and/or activated persulfate and other advanced oxidation processes are of particular emerging interests in the research community. These processes offer the potential for shorter reaction cycles, cheaper reagents, and less extreme physical conditions, leading to less expensive and perhaps smaller plants. AOPs have promise to destroy many emerging organic contaminants in water and are being considered in potable water treatment, wastewater treatment, site remediation, and industrial applications. Numerous aqueous emerging organic micropollutants such as perfluorinated surfactants and perfluroalkyl acids (PFAAs), pharmaceuticals, hormones, steroids, antibiotics, personal care products, disinfection by-products and other emerging pollutants; have been studied. This paper will provide a state-of-the-art and unified fundamental chemistry and reaction kinetics involved in the innovative advanced oxidation processes via cavitation, activated aqueous persulfate and other oxygenated oxidants; and will evaluate the performance and economics of AOPs involving ultrasound and hydrodynamic cavitation against conventional water treatment technologies. It is intended to advance our understanding of these emerging technologies and outline directions for future research.

References

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