Abstract
A synthesis of a new hybrid nanostructured sorbent based on graphene oxide modified with organic polymers of biological origin, such as chitosan and lignin, were developed. The effect of different mass ratios of the initial components (graphene oxide, lignosulfonate, chitosan) on the final sorbent properties was considered as applied to the liquid-phase sorption of organic dyes and heavy metal ions. Using scanning and transmission electron microscopy, X-ray diffractometry, thermogravimetry, infrared spectroscopy and Raman spectroscopy, the resulting compositions properties were evaluated. Presumably, during the nanocomposites formation, the macromolecules of chitosan and lignosulfonate were located between the layers of graphene oxide. The materials sorption capacity from different batches was studied under static conditions using as example of the lead ions and the organic dye — methylene blue (MB), sorption. It has been established that the sorption capacity for the composition 20:1:1 was the maximum value in the considered samples line — 1849.8 mg/g for MB and 324.6 mg/g for lead ions at a sorption time of 15 min. Thus, the study showed that the synthesized nanostructured composites modified with environmentally friendly and economical additives are suitable for removing various nature pollutants from water.
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