Preparation of Pectin-Based Biosorbents for Cadmium and Lead Ions Removal

The optimal formation conditions of pectin-based, as well as new hybrid pectin-guar gum, biosorbents were found. The lead affinity for obtained biosorbents was very strong even in solution of pH = 1, in opposite to cadmium, which was adsorbed from solutions of pH ≥ 2. The sorption capacities in the...

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Bibliographic Details
Published in:Separation science and technology 2014-01, Vol.49 (11), p.1679-1688
Main Authors: Jakóbik-Kolon, Agata, Milewski, Andrzej K., Mitko, Krzysztof, Lis, Andrea
Format: Article
Language:English
Subjects:
Affinity
Beads
biosorption
Cadmium
Guar gum
lead
Optimization
pectin
Reuse
Sorption
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Summary:The optimal formation conditions of pectin-based, as well as new hybrid pectin-guar gum, biosorbents were found. The lead affinity for obtained biosorbents was very strong even in solution of pH = 1, in opposite to cadmium, which was adsorbed from solutions of pH ≥ 2. The sorption capacities in the studied conditions were about 0.6 and 0.8 mmol/g for cadmium and lead, respectively. The cadmium removal could be fast and it is almost quantitatively desorbed using 0.25 M HNO 3 , while desorption of lead required 1 M HNO 3 to achieve a removal efficiency of ca. 75% from pectin-based beads. The possibility of biosorbents' reuse was also proved. Addition of guar gum to pectin biosorbent did not change its sorption properties significantly.
ISSN:0149-6395
1520-5754
DOI:10.1080/01496395.2014.906469