▎ 摘　　要

The paper presents results of research on the properties and application of cellulose-based (CEL) composite membranes with graphene oxide (GO) addition for the removal of heavy metals from aqueous solutions. Composite membranes (GO/CEL) were prepared by phase inversion from CEL solutions in 1-ethyl-3-methylimidazolium acetate (EMIMAc) containing addition of GO in the form of nanoparticle dispersion in N, N-dimethylformamide (DMF). The paper demonstrates how the amount of GO addition influences the structure and physicochemical and separation properties of GO/CEL composite membranes. Infrared spectroscopy, thermal analysis, X-ray crystallography and scanning electron microscopy were used in structural studies. Investigations of transport properties have shown that the introduction of 2%, 10% and 20% of GO into the composite membrane improves its transport properties, resulting in a 2-, 5- and 10-fold increase in permeate flux. The paper also investigated the use of GO/CEL composite membranes in removal of selected heavy metals (lead, zinc, cobalt and nickel) from aqueous solutions determined by atomic absorption spectrometry. It was found that similar to 100% removal of heavy metals is obtained for membranes containing 2%, 10% and 20% of GO in the cellulose matrix.