Nanoporous Block Polymer Thin Films Functionalized with Bio-Inspired Ligands for the Efficient Capture of Heavy Metal Ions from Water

ACS Applied Materials & Interfaces
Jacob L WeidmanWilliam A Phillip

Abstract

Heavy metal contamination of water supplies poses a serious threat to public health, prompting the development of novel and sustainable treatment technologies. One promising approach is to molecularly engineer the chemical affinity of a material for the targeted removal of specific molecules from solution. In this work, nanoporous polymer thin films generated from tailor-made block polymers were functionalized with the bio-inspired moieties glutathione and cysteamine for the removal of heavy metal ions, including lead and cadmium, from aqueous solutions. In a single equilibrium stage, the films achieved removal rates of the ions in excess of 95%, which was consistent with predictions based on the engineered material properties. In a flow-through configuration, the thin films achieved an even greater removal rate of the metal ions. Furthermore, in mixed ion solutions the capacity of the thin films, and corresponding removal rates, did not demonstrate any reduction due to competitive adsorption effects. After such experiments the material was repeatedly regenerated quickly with no observed loss in capacity. Thus, these membranes provide a sustainable platform for the efficient purification of lead- and cadmium-contaminated water ...Continue Reading

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Citations

May 15, 2018·Science Advances·Stefan ChiscaSuzana P Nunes
Apr 20, 2021·International Journal of Biological Macromolecules·Chi WangHongbing Deng
Jun 1, 2021·Macromolecular Rapid Communications·Md Mushfequr Rahman
Mar 14, 2018·Langmuir : the ACS Journal of Surfaces and Colloids·Sherwood BenavidesWilliam A Phillip

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