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The removal of toxic metals from liquid effluents by ion exchange resins. Part XII: Mercury(II) /H+/Lewatit SP112 La eliminación de metales tóxicos presentes en efluentes líquidos mediante resinas de cambio iónico. Parte XII: Mercurio(II)/H+/Lewatit SP112

AuthorsAlguacil, Francisco José; Escudero, E.
KeywordsLewatit SP112
Liquid effluents
Multiwalled carbon nanotubes
Issue Date2020
PublisherEditorial CSIC
CitationRevista de Metalurgia 56 (1): e160 (2020)
AbstractMercury(II) was eliminated, from acidic aqueous solutions, by the cationic ion exchange resin Lewatit SP112. Various experimental conditions were tested in the investigation, such as, stirring speed (275-1000 min), temperature (20-60 °C), pH of the aqueous solution (0-4) and resin dosage (0.05-0.4 g·L). Mercury(II) uptake onto the resin decreased with the increase of the temperature (exothermic reaction) in a spontaneous process, whereas the moving boundary model represented the metal uptake in the 20-60 °C temperatures range. Moreover, the experimental data fitted to the second order kinetic model (275 min) or the pseudo-second order kinetic model (500-1000 min), though maximum metal uptake was not dependent on the stirring speed applied to the system. The experimental results responded well to the Langmuir type-2 isotherm. The Hg(II)-loading ability of Lewatit SP112 was compared against that of other resins and non-functionalized multiwalled carbon nanotubes. Mercury(II) loaded onto the resin can be eluted by means of various eluants, furher, zero valent mercury was yielded from the eluates.
Publisher version (URL)https://doi.org/10.3989/revmetalm.160
Identifiersdoi: 10.3989/revmetalm.160
issn: 1988-4222
Appears in Collections:(CENIM) Artículos
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