Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 166, Issue 2-3, Pages 1377-1382Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2008.12.064
Keywords
Bentonite; Clinoptilolite; Immobilization; Phosphate-accumulating bacterium; Wastewater; Zeta potential
Categories
Ask authors/readers for more resources
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 24 h, while the original counterparts reached the mature biofilm after 12 h of incubation. Both forms of TER reached the mature biofilm after 24 h 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. (C) 2008 Elsevier B.V. Ail rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available