Abstract: The application of mineralogy in environmental sciences will be a major aspect of mineralogical studies in the 21st　century. Thi s article provides some e xamples of environmental mineralogy studies carried out in author's laboratory, such as nuclear waste disposal, mineral surfaces, microbial effects on toxic met al reduction and immobilization, atmospheric aerosol particles, and theoretical calculation of intrinsic sorption constants of metal cations on mineral surfaces . Quantitative study of the interactions in the system of mineral-water-micro be at the molecular level will be important for understanding low-temperature g eochemical and biogeochemical processes.