Document Detail

The effect of mineral carrier composition on phosphate-accumulating bacteria immobilization.
MedLine Citation:
PMID:  19153002     Owner:  NLM     Status:  MEDLINE    
The goal of this study was to determine the dynamics and yield of immobilization of the phosphate-accumulating bacterium Acinetobacter junii on mineral carriers. As mineral carriers natural clinoptilolite tuff from Turkey (T) and Serbia (S) and natural bentonite (TER), in original and magnesium (Mg)-exchanged form were used. The key feature which determined the extent of immobilization of A. junii was the type of carrier; the immobilization yield decreased in order T>TER>S. The number of immobilized cells was significantly higher for the Mg-exchanged carriers when compared to their original counterparts (95 and 75 x 10(8)CFU g(-1) for T, 74 and 58 x 10(8)CFU g(-1) for TER, 19 and 6 x 10(8)CFU g(-1) for S). The Mg-exchanged T and S displayed a prolonged biofilm growth up to 24h, while the original counterparts reached the mature biofilm after 12h of incubation. Both forms of TER reached the mature biofilm after 24h of incubation, due to swelling property of the material. The number of immobilized cells correlated significantly negatively with particle size of the carrier, indicating that particle size is another important feature which determined the extent of immobilization. The Mg-exchange of original carriers resulted in significant increase of the zeta potential. When all of the materials were compared, the increase of the zeta potential of carriers correlated negatively with the number of immobilized cells, suggesting that the zeta potential of material is not a crucial factor which determined the immobilization of cells.
J Hrenovic; T Ivankovic; D Tibljas
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2008-12-24
Journal Detail:
Title:  Journal of hazardous materials     Volume:  166     ISSN:  1873-3336     ISO Abbreviation:  J. Hazard. Mater.     Publication Date:  2009 Jul 
Date Detail:
Created Date:  2009-05-18     Completed Date:  2009-08-05     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9422688     Medline TA:  J Hazard Mater     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  1377-82     Citation Subset:  IM    
University of Zagreb, Faculty of Science, Division of Biology, Rooseveltov trg 6, 10000 Zagreb, Croatia.
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MeSH Terms
Acinetobacter / cytology*,  growth & development,  metabolism
Bentonite / pharmacology*
Cells, Immobilized / drug effects
Ion Exchange
Particle Size
Phosphates / metabolism*
Zeolites / pharmacology*
Reg. No./Substance:
0/Phosphates; 12173-10-3/clinoptilolite; 1302-78-9/Bentonite; 1318-02-1/Zeolites; 7439-95-4/Magnesium

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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