Chitin-based renewable materials from marine sponges for uranium adsorption

► Porous, flexible chitin networks can easily be extracted from marine sponges. ► Uranium from solution can be adsorbed on these networks with higher sorption capacities than other comparable materials. ► The uranium can easily be desorbed using diluted acid. ► The uranium seems to be bound by weak...

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Bibliographic Details
Published in:Carbohydrate polymers 2013-01, Vol.92 (1), p.712-718
Main Authors: Schleuter, Dorothea, Günther, Alix, Paasch, Silvia, Ehrlich, Hermann, Kljajić, Zoran, Hanke, Thomas, Bernhard, Gert, Brunner, Eike
Format: Article
Language:English
Subjects:
Adsorbents
Adsorption
Animals
Applied sciences
Aquatic Organisms - chemistry
Chemistry
Chitin
Chitin - chemistry
Exact sciences and technology
General and physical chemistry
Magnetic Resonance Spectroscopy
Marine sponge
Natural polymers
Physicochemistry of polymers
Porifera - chemistry
Solutions - chemistry
Spectroscopy, Fourier Transform Infrared
Spectrum Analysis, Raman
Starch and polysaccharides
Surface physical chemistry
Uranium
Uranium - chemistry
Water Pollution, Radioactive
Water Purification
Water treatment
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Summary:► Porous, flexible chitin networks can easily be extracted from marine sponges. ► Uranium from solution can be adsorbed on these networks with higher sorption capacities than other comparable materials. ► The uranium can easily be desorbed using diluted acid. ► The uranium seems to be bound by weak interactions only, such as hydrogen bonds. ► This renewable material may provide an alternative to more elaborate and expensive chitin-based sorbents. Marine sponges of the order Verongida form three-dimensional networks of fibrous chitin, which can easily be extracted. In the hydrated state, these networks are flexible, mechanically stable and can be cut or pressed into any desired form. Here, we show for the first time that chitin-based networks of sponge origin are useful for effective uranium adsorption. They adsorb uranium from solution with a higher adsorption capacity than many other chitinous sorbents. Up to 288mg/g could be achieved. Solid-state NMR, infrared, and Raman spectroscopy indicated that the uranyl is bound to the chitin by weak interactions. 90% of the uranyl could be desorbed using diluted hydrochloric acid. Uranium adsorption and desorption did not result in any destruction of the chitin-based material.
ISSN:0144-8617
1879-1344
DOI:10.1016/j.carbpol.2012.08.090