Dr. Cheng-Di Dong is a Doctor of Engineering and full professor at the National Kaohsiung University of Science and Technology. His area of research is sediments adsorption, rivers, estuaries, environment physical geography fluvial geomorphology, grain size analysis, wastewater water treatment, water quality, heavy metals, ocean equilibrium, polycyclic aromatic hydrocarbons, iron hydroxyl radicals, emerging contaminants, bulk environmental analysis, sorption, environmental impact assessment, pollution and contamination remediation, etc.