Sorption of dissolved organic matter by freshwater bacterioplankton

Here we describe the study of the sorption of high-molecular components of dissolved organic matter (DOM) of natural waters - humic acids - by eight bacterial strains isolated from freshwater. Isotherms of DOM sorption by cells are described by the Langmuir equation. Gram-positive bacteria adsorb mo...

Full description

Saved in:
Bibliographic Details
Published inE3S Web of Conferences Vol. 265; p. 4003
Main Authors Tikhonov, Vladimir, Drozdova, Olga, Cheptsov, Vladimir, Demin, Vladimir
Format Journal Article Conference Proceeding
LanguageEnglish
Published Les Ulis EDP Sciences 01.01.2021
Subjects
Bacteria
Bacterioplankton
Binding
Dissolved organic matter
Gram-negative bacteria
Gram-positive bacteria
Humic acids
Molecular weight
Natural waters
Polysaccharides
Sorption
Online AccessGet full text

Cover

More Information
Summary:Here we describe the study of the sorption of high-molecular components of dissolved organic matter (DOM) of natural waters - humic acids - by eight bacterial strains isolated from freshwater. Isotherms of DOM sorption by cells are described by the Langmuir equation. Gram-positive bacteria adsorb more DOM than gram-negative bacteria, with high molecular weight DOM fractions binding in a relatively selective manner. A high positive correlation (r = 0.91) was found between the decrease in the molecular weight of DOM during the sorption of these compounds by cells and the maximum sorption value. The formation of a polysaccharide capsule increases the binding of DOM by the cells of Pseudomonas sp . to the level of gram-positive bacteria.
ISSN:2267-1242
2555-0403
2267-1242
DOI:10.1051/e3sconf/202126504003