METHOD FOR CLEANING OF GROUND WATERS FROM ARSENIC Russian patent published in 2012 - IPC C02F1/28 C02F9/04 C02F1/72 C02F103/16 

FIELD: chemistry.

SUBSTANCE: invention can be used for cleaning of natural (ground and surface) and technogenic waters from arsenic. The method includes oxidation on psilomelane of trivalent arsenic to pentavalent and subsequent sorption of the later on brucite. The oxidation of trivalent arsenic is performed by filtration through psilomelane layer or by addition of psilomelane sized less than 0.1 mm into treated water, mixing for 30-60 minutes with subsequent sediment separation. The sorption is performed by the way of filtration of treated water through the layer of brusite or by the way of addition of brucite sized 10:50 μm to treated water, mixing for 30 minutes and subsequent sedimentation separation.

EFFECT: high quality of water cleaning and costs reduction due to use of natural sorbent and available mineral catalyst of oxidation process.

5 cl, 1 dwg, 1 tbl, 3 ex