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http://hdl.handle.net/10773/20818
Title: | Competitive removal of Cd2+ and Hg2+ Ions from water using Titanosilicate ETS-4: kinetic behaviour and selectivity |
Author: | Cardoso, Simão P. Lopes, Cláudia B. Pereira, Eduarda Duarte, Armando C. Silva, Carlos M. |
Keywords: | Cadmium Ion competition ETS-4 Ion exchange Kinetic |
Issue Date: | 2013 |
Publisher: | Springer |
Abstract: | Mercury and cadmium are priority hazardous substances. Some titanosilicates have been tested for the removal of Cd2+ and Hg2+ from single solutions by ion exchange. In this work, the competition between both contaminants for the exchanger binding sites of titanosilicate Engelhard titanosilicate material number 4 (ETS-4) was studied by performing batch experiments with aqueous solutions containing the two counter ions. The results evidenced the large capacity of ETS-4 and shown that the cadmium(II) diffusivity through the sorbent is higher than that of mercury(II). Furthermore, the ETS-4 exhibited higher kinetic and equilibrium selectivities for Cd2+, which attained values in the ranges 8.9-12.5 and 7.9-12.8, respectively. With respect to modelling, the pseudo-second-order equation described successfully the competitive removal of Cd2+ and Hg2+. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/20818 |
DOI: | 10.1007/s11270-013-1535-z |
ISSN: | 0049-6979 |
Publisher Version: | 10.1007/s11270-013-1535-z |
Appears in Collections: | CESAM - Artigos CICECO - Artigos DQ - Artigos |
Files in This Item:
File | Description | Size | Format | |
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Competitive Removal of Cd2+ and Hg2+ Ions from Water Using Titanosilicate ETS-4 Kinetic Behaviour and Selectivity_10.1007s11270-013-1535-z.pdf | 282.84 kB | Adobe PDF |
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