Cadmium adsorption by bacterial capsular polysaccharide coatings

Certain micro-organisms naturally excrete a capsular coat of polysaccharides. The potential of this phenomenon for biosorption of cadmium ions from low concentration solutions has been investigated. The bacterial species used to determine whether the presence of a capsular coating usefully improves...

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Bibliographic Details
Published in:Biotechnology letters 1986-10, Vol.8 (10), p.711-714
Main Authors: SCOTT, J. A, SAGE, G. K, PALMER, S. J, POWELL, D. S
Format: Article
Language:English
Subjects:
Biological and medical sciences
Biological treatment of waters
Biotechnology
cadmium
capsules
Environment and pollution
Fundamental and applied biological sciences. Psychology
Industrial applications and implications. Economical aspects
polysaccharides
Pseudomonas cruciviae
Pseudomonas putida
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Summary:Certain micro-organisms naturally excrete a capsular coat of polysaccharides. The potential of this phenomenon for biosorption of cadmium ions from low concentration solutions has been investigated. The bacterial species used to determine whether the presence of a capsular coating usefully improves adsorption characteristics was the polysaccharide excreting Pseudomonas putida . Within the concentration range of interest, 0.5-1.5 mg/l cadmium, viable P. putida had a removal efficiency of 100%, compared to 86-81% by Pseudomonas cruciviae , a non-capsular organism. Further tests with non-viable cells indicated that metabolic activity plays a significant role in cadmium uptake by P. cruciviae and to a much lesser extent with P. putida .
ISSN:0141-5492
1573-6776
DOI:10.1007/BF01032567