FIELD: chemical industry, more particularly purification of natural water and sewage from petroleum products and petroleum. SUBSTANCE: claimed method comprises passing water to be purified through layer of carbon-containing adsorbent. The latter is intercalated graphite produced from oxide forms and containing 0.1-0.5 wt % chemically modified highly dispersed amorphous silica. Purification is carried out till saturation of sorbent with petroleum products (m/petroleum/m sorbent=20) followed by regeneration thereof by washing with solvent to remove petroleum products and drying at 120-140 C. The present invention makes it possible to simplify purification process and attain high degree of purification. EFFECT: more efficient purification method. 3 cl, 3 tbl
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