METHOD OF EXTRACTION OF THE IONS OF THE HEAVY METALS FROM THE WATER SOLUTIONS Russian patent published in 2007 - IPC C02F1/28 B01J20/30 C02F101/20 B01J20/10 

FIELD: chemical industry; methods of extraction of the ions of the heavy metals from the water solutions.

SUBSTANCE: the invention is pertaining to the field of chemical industry, in particular, to purification of the water colutions. The method provides for the contact of the subjected to purification solution with the sorbent made on the basis of the silicon dioxide and representing the rice husk subjected to the thermal treatment at the temperature of 300-400°С in conditions of the oxygen shortage in the atmosphere of the escaping pyrogasses. At that the contact is exercised within 10-24 hours at the module of the solution/sorbent - 500-1000. The method ensures the high efficiency of the selective extraction of the lead and copper ions from the water solutions containing the lead and copper in the wide interval of concentrations.

EFFECT: the invention ensures the high efficiency of the selective extraction of the lead and copper ions from the water solutions containing the lead and copper in the wide interval of concentrations.

4 ex, 3 dwg