Reference: Harel P, et al. (2001) Sugar beet Ca-pectate gel as a cost-effective immobilized-cell matrix for metal biosorption. Meded Rijksuniv Gent Fak Landbouwkd Toegep Biol Wet 66(3a):291-4

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Abstract


Whole bacterial (Pseudomonas putida) and yeast (Saccharomyces cerevisiae) cells were immobilized by entrapment in gel beads of Ca-pectate obtained from sugar beet pulp and gel beads of commercial Ca-alginate (of algal origin). These immobilized-cell particles were tested for Cd2+ removal from dilute aqueous solutions and their mechanical properties were evaluated. Only Ca-pectate gel beads loaded with yeast cells displayed enhanced cadmium-binding efficiency (13.8 mg Cd2+ per g dry matter) as compared to sterile beads (10.7 mg/g). Sterile Ca-pectate gel beads were noticeably more brittle than algal alginate counterparts. The presence of cells reduced the mechanical resistance of both types of beads, however. The practical use of cell-loaded sugar beet Ca-pectate gel as a metal biosorbent is discussed in light of these results.

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Journal Article
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Harel P, Mignot L, Junter GA
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