2015 CSCE Annual Conference Regina - Building on our Growth Opportunities Conference
Dr. Gopal Achari, University of Calgary (Presenter)
Dr. Cooper H. Langford, University of Calgary
Emerging contaminants (EC) are a group of contaminants comprising of pharmaceuticals and personal care products, various industrial additives, pesticides and others that are increasingly found in water bodies. A common EC often detected in water bodies is Bisphenol A (BPA). BPA is used for production of polycarbonate and epoxy resins, unsaturated polyester-styrene resins and flame retardants. The final products are used as can coatings, additives in thermal paper, dental fillings and antioxidants in plastics used in food and drink packaging. A major source of release of this compound into the environment is through Waste Water Treatment Plant (WWTP) effluents. A high percentage of this compound passes through biological treatment processes, since it is highly stable and enters the aquatic environment. BPA has been detected at WWTP influents ranging from 0.08-4.98 µg/L and in effluents from 0.01-1.08 µg/L. This paper presents degradation of BPA using various advanced oxidative processes including UVC, UVC/H2O2 and O3.Reaction kinetics were obtained and effective parameters of each process in spiked water and wastewater were identified and optimized. The effect of inorganic ions and organic matter present in secondary treated wastewater on the degradation rate was also investigated. The results showed the best process for degrading BPA was with O3.The highest degradation rate at optimized conditions for water was with 1 L/min O3 which had a k-value of 1.196 min-1 with complete removal in 3 minutes and in wastewater was with 4 L/min O3 which had a k-value of 1.750 min-1 with complete removal in 2 minutes.