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פותח על ידי קלירמאש פתרונות בע"מ -
The effect of sorption on phenanthrene bioavailability
Year:
1996
Source of publication :
Journal of Biotechnology
Authors :
לאור, יעל
;
.
Volume :
51
Co-Authors:
Laor, Y., Faculty of Civil Engineering, Environ. and Water Rsrc. Engineering, Technion, Haifa, Israel
Strom, P.F., Dept. of Environ. Sci./NJ Agric. E., Cook College, Rutgers University, New Brunswick, NJ, United States
Farmer, W.J., Dept. of Soils and Environ. Science, University of California, Riverside, CA, United States
Facilitators :
From page:
227
To page:
234
(
Total pages:
8
)
Abstract:
Critical parameters that need to be considered in a bioavailability study are reviewed and applied to a study on the sorption (binding) of phenanthrene to dissolved humic acid (HA). Sorption coefficients values (K(oc)) of phenanthrene to HA were measured for HA from several sources. These values were used to calculate the amount of HA that was needed to bind different fractions of solution-phase phenanthrene. Sorption linearity and complete reversibility were assumed. A mixed culture of phenanthrene degraders, dominated by Pseudomonas sp. was sensitive to changes in dissolved phenanthrene concentrations in the range that was used in this study. Therefore, it was expected that if bound phenanthrene was not available, as is commonly stated in the literature, sorption would affect mineralization rate by reducing the concentration of free phenanthrene. However, it was found that mineralization of phenanthrene was not affected by sorption even when 90% of the phenanthrene was in the bound phase. It was concluded that the organisms were able to use the phenanthrene directly from the bound phase and at the same rate as from the free phase.Critical parameters that need to be considered in a bioavailability study are reviewed and applied to a study on the sorption (binding) of phenanthrene to dissolved humic acid (HA). Sorption coefficients values (Koc) of phenanthrene to HA were measured for HA from several sources. These values were used to calculate the amount of HA that was needed to bind different fractions of solution-phase phenanthrene. Sorption linearity and complete reversibility were assumed. A mixed culture of phenanthrene degraders, dominated by Pseudomonas sp. was sensitive to changes in dissolved phenanthrene concentrations in the range that was used in this study. Therefore, it was expected that if bound phenanthrene was not available, as is commonly stated in the literature, sorption would affect mineralization rate by reducing the concentration of free phenanthrene. However, it was found that mineralization of phenanthrene was not affected by sorption even when 90% of the phenanthrene was in the bound phase. It was concluded that the organisms were able to use the phenanthrene directly from the bound phase and at the same rate as from the free phase.
Note:
Related Files :
Adsorption
bacteria
bioavailability
Biodegradation
Conference paper
Organic acids
Pseudomonas bacteria
Sorption
עוד תגיות
תוכן קשור
More details
DOI :
10.1016/S0168-1656(96)01600-8
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר מתוך כינוס
;
.
Language:
אנגלית
Editors' remarks:
ID:
20257
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:35
Scientific Publication
The effect of sorption on phenanthrene bioavailability
51
Laor, Y., Faculty of Civil Engineering, Environ. and Water Rsrc. Engineering, Technion, Haifa, Israel
Strom, P.F., Dept. of Environ. Sci./NJ Agric. E., Cook College, Rutgers University, New Brunswick, NJ, United States
Farmer, W.J., Dept. of Soils and Environ. Science, University of California, Riverside, CA, United States
The effect of sorption on phenanthrene bioavailability
Critical parameters that need to be considered in a bioavailability study are reviewed and applied to a study on the sorption (binding) of phenanthrene to dissolved humic acid (HA). Sorption coefficients values (K(oc)) of phenanthrene to HA were measured for HA from several sources. These values were used to calculate the amount of HA that was needed to bind different fractions of solution-phase phenanthrene. Sorption linearity and complete reversibility were assumed. A mixed culture of phenanthrene degraders, dominated by Pseudomonas sp. was sensitive to changes in dissolved phenanthrene concentrations in the range that was used in this study. Therefore, it was expected that if bound phenanthrene was not available, as is commonly stated in the literature, sorption would affect mineralization rate by reducing the concentration of free phenanthrene. However, it was found that mineralization of phenanthrene was not affected by sorption even when 90% of the phenanthrene was in the bound phase. It was concluded that the organisms were able to use the phenanthrene directly from the bound phase and at the same rate as from the free phase.Critical parameters that need to be considered in a bioavailability study are reviewed and applied to a study on the sorption (binding) of phenanthrene to dissolved humic acid (HA). Sorption coefficients values (Koc) of phenanthrene to HA were measured for HA from several sources. These values were used to calculate the amount of HA that was needed to bind different fractions of solution-phase phenanthrene. Sorption linearity and complete reversibility were assumed. A mixed culture of phenanthrene degraders, dominated by Pseudomonas sp. was sensitive to changes in dissolved phenanthrene concentrations in the range that was used in this study. Therefore, it was expected that if bound phenanthrene was not available, as is commonly stated in the literature, sorption would affect mineralization rate by reducing the concentration of free phenanthrene. However, it was found that mineralization of phenanthrene was not affected by sorption even when 90% of the phenanthrene was in the bound phase. It was concluded that the organisms were able to use the phenanthrene directly from the bound phase and at the same rate as from the free phase.
Scientific Publication
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