Investigation on Natural Radioactivity of Environmental Samples Near the Bauxite Processing Facility

摘要: Bauxite is a main raw material for the production of alumina and aluminum hydroxide in processing plant KC company. It NORM (Naturally Occurring Radioactive Materials), its waste, red mud, TENORM (Technologically Enhanced Naturally Materials). The purpose geochemical mineralogical investigations bedrock soils around plant, large source, was to provide basic data measuring radiation dose protec- ting from radioactive hazards. Soils were mixtures minerals derived country rock (quartz, feldspar, mica, kaolin, gibbsite, sepiolite) bauxite (hematite, boehmite, calcite) open-air storage. Average U Th contents soil samples 4.7 ppm 23 ppm, respectively, indicating somewhat anomaly. average concentrations radionuclides are 40 K 100∼1,433 Bq/kg, 226 Ra