Carbon nanomaterial-based aerogels for improved removal of copper(II), zinc(II), and lead(II) ions from water
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Access to clean water continues to be an issue throughout the world. Supplies of freshwater have been decreasing due to population growth, natural disasters, and pollution. Advanced carbon-based technologies have allowed for opportunities at the advancement of efficient and cost-effective materials to quickly and easily remove contaminants from high demand drinking water areas. Carbon nanomaterials that were integrated into 2-D hybrid papers have previously shown the ability to adsorb metal ions, such as copper (II), and polyaromatics. This work highlights the advantages of using carbon-based aerogels for removing metal ions, specifically copper, lead, and zinc, from water. The use of single-wall carbon nanotube- graphene nanoplatelet (SWCNT - GnP) aerogels with 3-D architecture have shown the increased adsorption of polyaromatic compounds. Herein we demonstrate their increased ability to adsorb copper (II), lead (II), and zinc (II) ions. Compared to SWCNT - GnP hybrid papers and activated carbon, carbon nanomaterial-based aerogels have an adsorption capacity, q, of up to 5-fold, 7-fold, and 48-fold larger for copper, lead, and zinc, respectively.
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M.S.