Dr. Meichtry work focuses on the application of Advanced Processes (APs)—including heterogeneous photocatalysis, iron nanoparticles, Fenton and Fenton-like systems, peroxicoagulation, and sonolysis—to address a wide range of contaminants in water and soil. These include inorganic species such as nitrate, Cr, Hg, Pb, U, As, and F; organic pollutants such as 4-chlorophenol, NTA, EDTA, citric acid, and dyes; and also microbiological contaminants such as E. coli. He conducts mechanistic and kinetic studies of degradation processes, develops analytical methods, and synthesizes nanoparticles tailored for AP applications. His work also involves the design and construction of laboratory- and bench-scale reactors for advanced treatment processes. He also conducts groundwater-quality surveys, including field sampling, in-situ analyses, and the development of water-quality indices, and contributes to the development of an arsenic- and fluoride-removal filter based on particulate zerovalent iron, and to stabilization/solidification technologies using Portland cement for the safe final disposal of hazardous wastes.