Cs+ removal and optical detection by microporous lanthanide silicate Eu-AV-20 in a fixed-bed column
authors Figueiredo, BR; de Melo, MMR; Portugal, I; Ananias, D; Rocha, J; Silva, CM
nationality International
journal CHEMICAL ENGINEERING JOURNAL
author keywords Breakthrough curves; Cesium sensing; Eu-AV-20; Ion exchange; Modelling; Photoluminescence
keywords CESIUM ION-EXCHANGE; TITANOSILICATE ETS-4; AQUEOUS-SOLUTIONS; CRYSTALLINE SILICOTITANATE; CHELATING RESIN; HG2+ IONS; MECHANISM; ZEOLITE; BATCH; WATER
abstract Microporous silicate Eu-AV-20 has recently proved to be a promising ion exchange material for cesium removal from aqueous solutions, and its potential for Cs+ photoluminescence sensing was additionally demonstrated. In this work, Cs+ removal was performed in a fixed-bed column, and the influence of linear velocity and mass of ion exchanger on the breakthrough curves was analysed. The experimental data were modelled on the basis of Nernst-Planck (NP) equations and with four well-known analytic models. The analytic expressions provided low errors (root mean square deviation, RMSD, between 3.20% and 6.47%); the 2-parameter NP-based model fitted the data quite well (RMSD = 6.66% for correlation and 6.54% for prediction), yielding crucial information on both the transport mechanism within the Eu-AV-20 particles, and the intrinsic dynamic behaviour of the fixed-bed ion exchange column. Taking into account that Eu-AV-20 samples loaded with different amounts of Cs+ exhibited distinct photoluminescence spectra, our results reinforce the potential of AV-20 materials for Cs+ sensing, which raises the possibility of online monitoring the ion exchange in a fixed-bed column using an optical fibre and a spectrometer. (C) 2015 Elsevier B.V. All rights reserved.
publisher ELSEVIER SCIENCE SA
issn 1385-8947
year published 2016
volume 286
beginning page 48
ending page 58
digital object identifier (doi) 10.1016/j.cej.2015.10.046
web of science category Engineering, Environmental; Engineering, Chemical
subject category Engineering
unique article identifier WOS:000366790000005
  ciceco authors
  impact metrics
journal analysis (jcr 2017):
journal impact factor 6.735
5 year journal impact factor 6.496
category normalized journal impact factor percentile 95.128
dimensions (citation analysis):
altmetrics (social interaction):



 


Sponsors

1suponsers_list_ciceco.jpg