Dr. Xing's research in Environmental & Soil Chemistry focuses on the protection of our environment through maintaining/improving soil and water quality. Particular interests include: (1) environmental fate and ecotoxicity of engineered nanoparticles, (2) interactions between organic compounds and natural organic matter, (3) interfacial processes, (4) characterization of natural organic matter and biochar, (5) application of spectroscopic and analytical instruments in soil & environmental science research