Document Detail


Determination of bacterial mass recovery in iron-coated sand: influence of ionic strength.
MedLine Citation:
PMID:  18569327     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Column experiments were performed in this study to investigate the influence of ionic strength on the mass recovery of Escherichia coli in iron-coated sand. The first set of the experiments was performed in the coated sand under various NaCl concentrations. The second experiments were carried out in the coated sand under various NaCl concentrations with a fixed phosphate concentration. Bacterial mass recoveries were quantified from breakthrough curves. The mass recoveries were compared with those obtained from the experiments in quartz sand under the same ionic strength/composition. Experimental results show that the mass recovery in quartz sand decreased from 76.7 to 9.2% with increasing effective ionic strength (I(e)) from 0 to 149.4 mM using NaCl. In the coated sand, however, the mass recovery remained constant in the range between 2.7 and 3.7% even though I(e) increased in the same range. This indicates that bacterial adhesion to the coated sand may not be affected by ionic strength in the presence of NaCl. Results also illustrate that the mass recovery in quartz sand decreased from 64.7 to 13.3% with increasing I(e) from 0.97 to 149.6 mM using NaCl under a fixed phosphate concentration (0.97 mM as I(e)). In the coated sand, the mass recovery increased sharply to 58.5% in 0.97 mM phosphate concentration compared to the case in deionized water (3.0%). This indicates that in the coated sand bacterial mass recovery can increase due to the presence of phosphate. In addition, the mass recovery in the coated sand decreased from 58.5 to 6.7% with increasing I(e) from 0.97 to 149.6 mM using NaCl under a fixed phosphate concentration (0.97 mM as I(e)). This demonstrates that bacterial adhesion to the coated sand may be influenced by ionic strength in the presence of phosphate.
Authors:
Chang-Gu Lee; Seong-Jik Park; Hyon-Chong Kim; Yong-Un Han; Song-Bae Kim
Related Documents :
16790867 - Polyelectrolyte coatings for microchip capillary electrophoresis.
11416847 - Influence of coating strain on calcium phosphate thin-film dissolution.
19281157 - Superhydrophobic conductive carbon nanotube coatings for steel.
23980757 - Analysis of storage and structural carbohydrates in developing wheat (triticum aestivum...
24926607 - Production of adsorbents by pyrolysis of paper mill sludge and application on the remov...
17662337 - Characterizing dissolved organic matter and evaluating associated nanofiltration membra...
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering     Volume:  43     ISSN:  1093-4529     ISO Abbreviation:  J Environ Sci Health A Tox Hazard Subst Environ Eng     Publication Date:  2008 Jul 
Date Detail:
Created Date:  2008-06-23     Completed Date:  2008-12-30     Revised Date:  2009-08-14    
Medline Journal Info:
Nlm Unique ID:  9812551     Medline TA:  J Environ Sci Health A Tox Hazard Subst Environ Eng     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1108-14     Citation Subset:  IM    
Affiliation:
Environmental Biocolloid Engineering Laboratory, Program in Rural System Engineering, Seoul National University, Seoul, Korea.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Cell Movement / physiology
Computer Simulation
Escherichia coli / isolation & purification*,  physiology*
Ions
Iron / chemistry*
Materials Testing
Models, Biological*
Silicon Dioxide / chemistry*
Chemical
Reg. No./Substance:
0/Ions; 7439-89-6/Iron; 7631-86-9/Silicon Dioxide

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


Previous Document:  Response surface optimization of phosphorus species adsorption onto powdered alum sludge.
Next Document:  Early life and adult exposure to isoflavones and breast cancer risk.