METHOD OF PURIFYING WATER FROM HEAVY METAL IONS

摘要

FIELD: chemistry.SUBSTANCE: waste water containing heavy metal ions is passed through a sorbent layer in the form of a pretreated natural zeolite. The zeolite is first annealed at 800-900°C for 45 minutes. The annealed sorbent is then treated with an acid solution with concentration of 0.5-1 mol/l for 1.5 hours at 30°C. The sorbent is then annealed for 1.5 hours at 600°C and treated with an alkali solution with concentration of 0.5-1 mol/l for 1.5 hours at 30°C. The alkali-treated sorbent is then annealed at 600°C for 1.5 hours. The initial sorbent used is Khotynetsky zeolite-containing tripoli.EFFECT: high sorption capacity of the zeolite owing to thermochemical modification of the surface of the sorbent, which results in high degree of purity of water from harmful impurities.3 tbl