METHOD OF WATER PURIFICATION Russian patent published in 1995 - IPC

FIELD: water purification. SUBSTANCE: starting water first comes in contact with fibrous chemosorbent - copolymer of acrylonitrile and 5-vinyl-2-methylpyridine, and then with carbon fibrous sorbent preliminarily heat-treated at a temperature of 180 to 200 C for 2 to 4 hours. For purification of water containing heavy fractions of petroleum products water preliminarily comes in contact with cotton pulp with a degree of polymerization of 25 to 75 and fibre length within 6 to 12 mm. Pesticide purification factor K_p=0,8·10³ - 0,9·10³. EFFECT: facilitated procedure. 2 cl, 4 tbl