title: Unexpected radium-226 build-up in pyrite-burning sulphuric acid plants.
mesh_terms: D002617:Chemical Industry; D004781:Environmental Exposure; D006801:Humans; D007501:Iron / Q000032:analysis*; D008906:Mining; D009787:Occupational Medicine; D011883:Radium / Q000032:analysis*; D013019:South Africa; D013464:Sulfuric Acids
chemical_list: D013464:Sulfuric Acids; D007501:Iron; D011883:Radium