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Molecular Recognition and Scavenging of Arsenate from Aqueous Solution Using Dimetallic Receptors

Title: Molecular Recognition and Scavenging of Arsenate from Aqueous Solution Using Dimetallic Receptors
Authors: Moffat, CD
Weiss, DJ
Shivalingam, A
White, AJP
Salauen, P
Vilar, R
Item Type: Journal Article
Abstract: A series of copper(II), nickel(II) and zinc(II) dimetallic complexes were prepared and their affinities towards arsenate investigated. Indicator displacement assays (IDAs) were carried out to establish the complexes with best affinities towards arsenate. A di-zinc complex (3) was selected and its arsenate-binding abilities investigated by isothermal titration calorimetry (ITC). The X-ray crystal structure of this metallo-receptor bound to arsenate is also reported, which allowed us to establish the binding mode between 3 and this oxyanion. Immobilising 3 onto HypoGel resin yielded a novel adsorbent (Zn–HypoGel) with high affinity for arsenate. Adsorption of arsenate from competitive solutions and natural groundwater was greater than that of the commercially used iron oxide Bayoxide E33. Zn–HypoGel could be efficiently and simply regenerated by washing with sodium acetate solution.
Issue Date: 22-Oct-2014
Date of Acceptance: 22-Oct-2014
URI: http://hdl.handle.net/10044/1/39687
DOI: http://dx.doi.org/10.1002/chem.201404723
ISSN: 1521-3765
Publisher: Wiley
Start Page: 17168
End Page: 17177
Journal / Book Title: Chemistry-A European Journal
Volume: 20
Issue: 51
Copyright Statement: © 2014 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Sponsor/Funder: Engineering & Physical Science Research Council (EPSRC)
Natural Environment Research Council (NERC)
Funder's Grant Number: EP/K039946/1
NE/L013134/1
Keywords: Science & Technology
Physical Sciences
Chemistry, Multidisciplinary
Chemistry
adsorption
heavy metals
arsenic
dimetallic receptors
CRYSTAL-STRUCTURES
ZINC(II) COMPLEXES
PHOSPHATE
WATER
REMOVAL
MODELS
SPECIATION
BINDING
IONS
PH
Adsorption
Arsenates
Crystallography, X-Ray
Hydrogen-Ion Concentration
Organometallic Compounds
Sodium Acetate
Solutions
Water Pollutants, Chemical
Water Purification
Zinc
General Chemistry
03 Chemical Sciences
Publication Status: Published
Appears in Collections:Chemistry
Biological and Biophysical Chemistry
Earth Science and Engineering
Faculty of Natural Sciences



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