alexa Evaluation of a Flue Gas Desulphurisation (FGD)-Gypsum from a Wet Limestone FGD as Adsorbent for Removal of Selenium in Water Streams | OMICS International | Abstract
ISSN: 2161-0525

Journal of Environmental & Analytical Toxicology
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Research Article

Evaluation of a Flue Gas Desulphurisation (FGD)-Gypsum from a Wet Limestone FGD as Adsorbent for Removal of Selenium in Water Streams

Patricia Córdoba1,3*, María Eugenia González2, Aixa González2, Mercedes Maroto-Valer1, Natalia Moreno3, Noelia Sepúlveda2, Rodrigo Navia2 and Xavier Querol3
1Center for Innovation on Carbon Capture and Storage (CCS), Institute of Mechanical, Proccess and Energy Engineering (IMPEE), Heriot-Watt University, Edinburgh, Scotland, EH14 4AS
2Department of Chemical Engineering, University of the La Frontera, Castilla 54-D, Temuco, Chile
3Institute of Environmental Assessment and Water Research (IDÆA-CSIC), Jordi Girona 18-26, E-08034- Barcelona, Spain
Corresponding Author : Patricia Córdoba Sola
Institute of Environmental Assessment and Water Research (IDÆA-CSIC)
Jordi Girona 18-26, E-08034- Barcelona, Spain
Tel: 44 01314514737
E-mail: [email protected] or [email protected]
Received June 13, 2015; Accepted June 24, 2015; Published June 28, 2015
Citation: Córdoba P, González ME, González A, Maroto-Valer M, Moreno N, et al. (2015) Evaluation of a Flue Gas Desulphurisation (Fgd)-Gypsum from a Wet Limestone Fgd as Adsorbent for Removal of Selenium in Water Streams. J Environ Anal Toxicol 5:305. doi:10.4172/2161-0525.1000305
Copyright: © 2015 Córdoba P, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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Abstract

The use of a Flue Gas Desulphurisation (FGD)-gypsum as material for selenium removal in re-circulated waters from a wet limestone FGD system with water re-circulation to the scrubber and with use of an Al-additive, to increase SO2 emission abatement efficiencies, has been evaluated by adsorption studies. Potentiometric titration experiments for FGD-gypsum reveal that the acidic conditions of the aqueous phase of gypsum slurry, induced by the Al-additive, result in the protonation of the FGD-gypsum surface. The adsorption isotherms of Se onto FGD-gypsum are appropriately described by the Langmuir model suggesting that Se is adsorbed by the protons adhered on FGD-gypsum surface and forms a monolayer. The removal of Se from FGD waters by the employment of FGD-gypsum is significant as prevention measure based on the management on FGD-gypsum and water streams before their production and the subsequent disposal in landfills and/or in application scenarios.

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