ISSN:
1662-8985
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Sugar-beet pectin gels are a novel material with applications in heavy and precious metalremoval and biomass immobilization which are similar to those of alginate. This paper presents theexperimental results of the kinetics of Pb(II) and Au(III) batch removal with these gels, with andwithout immobilized biomass of the brown algae Fucus vesiculosus. The evolution of the metalconcentration, solution pH and Ca2+ liberation was determined. The biomass was characterizedbefore and after the metal removal using SEM-EDX, FESEM, FETEM, XRD and FTIR techniques.The Pb(II) removal followed a typical biosorption kinetics with a final equilibrium metalconcentration. The immobilized algae had different biosorptive behaviour than both the originalsugar-beet pectin gels and the free biomass. There was no Au(III) removal with the pectin gelswithout algae. In the case of the immobilized biomass, the Au(III) recovery occurred in two stages,where the biosorption was followed by the reduction of the Au(III) to Au(0) due to the presence ofthe own algae. The Au(0) precipitated preferably on the surface of the algal biomass and in the formof colloidal gold in the solution and entrapped within the pectin gel matrix
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/39/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.20-21.599.pdf
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