1.Purifying agent in pharmaceutical industry, special in antibiotic medication, such as Oxytetracycline, Chloramphenicol, etc; 2.Precipitating agent in Rare-earth mineral processing; 3.Bleaching agent in the textile activities, wood pulp bleaching; 4.Rust-remover for Metal treatment; 5.Grinding agent, such as Marble polishing; 6.Waste water treatment, removing calcium from water.