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Graphene Oxide Biopolymer Aerogels for the Removal of Lead from Drinking Water Using a Novel Nano-enhanced Ion Exchange Cascade by Bloor, J.M.; Handy, R.D.; Awan, S.A.; Jenkins, D.F.L. is a Environmental Science article available to read on EtoBox.

What is Graphene Oxide Biopolymer Aerogels for the Removal of Lead from Drinking Water Using a Novel Nano-enhanced Ion Exchange Cascade about?

Potable water in developing countries often contains levels of toxic metals that exceed the recommended international limits, with impacts on human health. The aim of the present study was to develop a low cost aerogel synthesised from graphene oxide (GO) cross-linked with alginate to remove Pb from potable water. Aerogels were made by a sol-gel of the composite materials followed by a freeze drying method. The shape of the aerogels were 50 mm diameter disks, 5 mm deep and characterised by an open porous network of 50 to 150 micrometres which are mechanically robust upon hydration. Firstly, the study was conducted using a batch adsorption method from a starting concentration 0.48 mM (100 mg/l) of Pb in ultrapure water over 240 min, n = 4 with controls. A second series of experiments compared the adsorption of different competing ions at different valencies (Na, Ca, Cu, La) in an equivalent media. A third series of experiments explored Pb desorption from the aerogel at low pH and in highly acidic conditions. This simple filter system, based on a batch adsorption methodology expresses a high affinity for Pb resulting in an ultra-high mean maximum adsorption capacity of 504 mg/g of Pb

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Author

Bloor, J.M.; Handy, R.D.; Awan, S.A.; Jenkins, D.F.L.

Publisher

Elsevier Science; Elsevier ; Elsevier Inc.; Elsevier BV (ISSN 0147-6513)

Published

2020

Language

EN

Field

Environmental Science (Physical Sciences)