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Title: Enhanced cesium removal from real matrices by nickel-hexacyanoferrate modified activated carbons
Authors: Vanderheyden, S. R. H.
Yperman, Jan 
Carleer, Robert 
Schreurs, Sonja 
Issue Date: 2018
Source: CHEMOSPHERE, 202, p. 569-575
Abstract: After nuclear disasters, radioactive cesium partitions to soils and surface water, where it decays slowly. Hexacyanoferrates (HCFs) have excellent cesium removal properties but their structure is typically powdery. Many carrier materials, such as biomass or magnetic particles, have been used to provide a suitable substrate for HCFs that can be used in filters. This research uses the sorption properties of activated carbon (AC) to incorporate Ni-HCF, resulting in good structural properties of the hybrid material. These HCF-modified ACs show drastically improved sorption properties towards Cs after one, two and three HCF impregnation cycles. The activated carbon from brewer's spent grain with one modification cycle removes more than 80% of 1 mg L-1 Cs in a sea water solution and more than 98% of 1 mg L-1 Cs from surface water at a low AC dosage (0.5 g L-1). Iron and nickel leaching is studied and found to be dependent on the type of modified AC used and the leaching solution. Iron leaching can be problematic in surface and seawater, whereas nickel leaching is especially pronounced in seawater. (C) 2018 Elsevier Ltd. All rights reserved.
Notes: Vanderheyden, SRH (reprint author), Hasselt Univ, Ctr Environm Sci, Res Grp Appl & Analyt Chem, Agoralaan Bldg D, B-3590 Diepenbeek, Belgium;;;
Keywords: Activated carbon; Brewer's spent grain; Adsorption; Cesium; Hexacyanoferrate
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ISSN: 0045-6535
e-ISSN: 1879-1298
DOI: 10.1016/j.chemosphere.2018.03.096
ISI #: 000430882700065
Category: A1
Type: Journal Contribution
Validations: ecoom 2019
Appears in Collections:Research publications

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