Polymer-based nanocomposites reinforced with functionalized-MWCNT and their utilizing as sorbent for removal of MB and Cd2+ ion from water media: A review

Water is the most abundant and most essential substance for health and human life. Unfortunately, over the past years, with the development of industries and factories, the pollution caused by their output in the water environment has increased. The existence of heavy metal ions and artificial dyes in water due to their high toxicity, in addition to environmental pollution, are also dangerous to human health. Therefore, it is necessary to provide an easy and efficient method for the decomposition of pollution from the water environment. So far, various methods (oxidation, reverse osmosis, ion exchange, adsorption, etc.) have been investigated to remove contaminants from the water media. Among all these, absorption as an effective and low-cost method has always been considered by researchers in recent years. Polymer nanocomposites (PNCs) have been highly acclaimed by researchers due to their diverse synthetic methods and high adsorption capacity in removing contaminants. Herein, we review the adsorption of Cd2+ and Methylene blue (MB) dye from an aqueous solution using various PNCs reinforced with multi-walled carbon nanotubes (MWCNT)s. Experimental results and study of Langmuir and Freundlich isotherm models indicate high adsorption capacity by these NCs. (C) 2021 Elsevier B.V. All rights reserved.