NDLI: Desorption of Heavy Metals from Ion Exchange Resin with Water and Carbon Dioxide

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Desorption of Heavy Metals from Ion Exchange Resin with Water and Carbon Dioxide

Content Provider	Semantic Scholar
Author	Silva, Denilson Luz Da Brunner, Gerd
Copyright Year	2006
Abstract	Adsorption and regeneration of ion exchange resins were studied using a subcritical solution of a CO2-H2O mixture and a fixed bed column. The commercial Amberlite IRC-50/IRC-86 cation exchange resins and Amberlite IRA-67 anion exchange resin were tested for heavy metals (Pb, Cu, Cd) adsorption from a solution with different initial metal concentrations at different temperatures. After adsorption, the loaded resins were regenerated with water and carbon dioxide at different temperatures and a pressure of 25 MPa. The efficiency of the IRC-50 resin was lower than that of the IRC-86 resin for the adsorption of metals like Cd, Cu and Pb. Results obtained for desorption of these metals indicated that the process could be used for Cd and in principle for Cu. Sorption of metal ions depended strongly on feed concentration. Mathematical modeling of the metal desorption process was carried out successfully as an extraction process. For this purpose, the VTII Model, which is applied to extraction from solids using supercritical solvents, was used in this work.
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://repositorio.ufpa.br:8080/jspui/bitstream/2011/6577/1/Artigo_DesorptionHeavyMetals.pdf
Alternate Webpage(s)	http://www.scielo.br/pdf/bjce/v23n2/29926.pdf
Language	English
Access Restriction	Open
Subject Keyword	3-Mercaptopropionic Acid Anions Carbon Dioxide Cation Exchange Resins Cations Copper Ion Exchange Resins Ions Lead Mathematical Concepts Metals Metals, Heavy Resin amberlite XAD 7 solid substance
Content Type	Text
Resource Type	Article

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