University of Cincinnati
Dr. McAvoy is currently a Professor-Educator in Environmental Engineering at the University of Cincinnati. His teaching responsibilities include courses on physical and chemical treatment, biological wastewater treatment, numerical methods and environmental modeling, and environmental sustainability. His research interests are in the areas of biological wastewater treatment, biogas generation from organic waste, fate of contaminants in engineered and natural systems, and sustainable systems development and evaluation. He has published over 70 peer reviewed journal articles, presented more than 90 papers at scientific meetings, and holds two patents. He has been recognized for his accomplishments with awards from the Water Environment Federation (Willem Rudolf Medal - 1997), Environmental Science & Technology (Excellence in Review Award - 2003), the Engineers and Scientists of Cincinnati (Award for Engineer in Industry - 2007), and the University of Cincinnati (President’s Award for Outstanding Adjunct Faculty - 2012). He also served on the Editorial Board of Environmental Toxicology & Chemistry (2000-2003, 2008-2010) and Research Council of the Water Environment & Reuse Foundation (2003-2008).
Assessing the Risk of Azithromycin and Ciprofloxacin in Biosolids Amended Soil
Trace organic compounds (TOrCs) in land applied biosolids are a concern to the public, industry, and regulators. While the number of scientific studies examining the issue continues to grow, significant knowledge gaps still remain that hinder our ability to assess human and ecological risk of TOrCs following biosolids amendment to soil. The USEPA has identified biosolids-borne azithromycin and ciprofloxacin as high priority compounds for research attention to close their risk assessment knowledge gaps. Therefore, the focus of this study was to obtain high quality data on the fate, exposure, and toxicity of the target TOrCs for use in assessing their risk. This goal was accomplished by either obtaining data from the literature or by direct measurement in laboratory studies and from field samples. An emphasis was placed on data generated in realistic biosolids-soil matrices under real-world conditions. Key data included: (1) physical-chemical properties (water solubility, octanol-water partition coefficient, Henry’s law constant); (2) environmental fate data (plant and earthworm uptake, sorption to soil, biodegradation, and hydrolysis); (3) exposure data (field measured); and (4) toxicity endpoints (ecological and mammalian). These data are then used to assess the risk of azithromycin and ciprofloxacin using USEPA’s BCRAM screening risk assessment tool.