▎ 摘　　要

NOVELTY - Preparing membranes of graphene oxide or its derivatives and cellulose, comprises: e.g. dispersing graphene oxide (GO) or derivative of graphene oxide (PGO) in water to form a stock solution in the form of GO/PGO-water suspension; adding urea to the base solution in a ratio of at least 1:4, relative to the amount of GO/PGO and sodium or potassium hydroxide in a ratio of at least 1:2 in relation to the amount of urea used; introducing cellulose into the slurry prepared in the proportion of at least 1:2 in relation to GO/PGO used, and fully dissolving; and acidifying the solution. USE - The method is useful for preparing membranes of graphene oxide or its derivatives and cellulose, where the membranes are useful for determination of heavy metals, removing trace amounts of heavy metals from a solution and concentrating the heavy metals. DETAILED DESCRIPTION - Preparing membranes of graphene oxide or its derivatives and cellulose, comprises: dispersing graphene oxide (GO) or derivative of graphene oxide (PGO) in water to form a stock solution in the form of GO/PGO-water suspension; adding urea to the base solution in a ratio of at least 1:4, relative to the amount of GO/PGO and sodium or potassium hydroxide in a ratio of at least 1:2 in relation to the amount of urea used; introducing cellulose into the slurry prepared in the proportion of at least 1:2 in relation to GO/PGO used, and fully dissolving; acidifying the solution and passing the slurry through a membrane filter with a pore size of not greater than 1 mu m; selecting the volume of the suspension passed through the membrane to contain 0.03-1 mg GO/PGO for 1 cm or 2 cm; and drying the obtained membrane and subjecting to pressing with a pressure force of at least 20 kN, preferably 130-140 kN.