Nitrite;  water;  Purification treatment

Nitrite in water has many hazards to humans and animals, ion exchange, reverse osmosis, electrodialysis, biological and denitrification, chemical and chemical catalytic nitrification can remove nitrite from water, these methods have their own advantages and disadvantages. The ion exchange method concentrates nitrite in the medium or waste liquid, which is easy to cause secondary pollution; The biological method has the characteristics of high efficiency and low consumption, but the investment is large; Although chemical reduction can reduce nitrite to harmless nitrogen, its reaction needs to be carried out at higher temperatures and has low efficiency. For the treatment of nitrite in underground deep water with low content and small processing capacity, the chemical oxidation method has the advantages of simple equipment and low treatment cost.