Potassium ferrate has become a new type of green water treatment material. 2. Potassium ferrate is used for the treatment of industrial wastewater and urban domestic sewage. 3. Potassium ferrate is used in aquaculture water treatment for fish ponds. 4. Potassium ferrate is used for marine antifouling treatment. 5. Potassium ferrate is used for the recycling of swimming pool water. 6. The broad applicability of potassium ferrate. As a new non-nitrogen high-efficiency agent for drinking water treatment, it can rapidly kill bacteria and viruses in water; remove certain organic pollutants and heavy metal ions, decolorize and deodorize, control the formation of biological slime in condensed circulating water, and treat wastewater containing phenol and cyanide-cadmium plating. It is used to produce oxidized starch for paper surface sizing and textile finishing. In chemical production, it is employed to oxidize sulfonic acids, nitrites, ferrocyanides, and other inorganic substances. In zinc refining, it is used to remove manganese, antimony, and arsenic. In the tobacco industry, it is applied in cigarette filters, among other uses.