Abstract：
:The present study deals with the sorption of Cd(II) and Pb(II) by exopolymeric substances (EPS) extracted from activated sludges or pure bacterial strains. The percentage of sorbed metal increases with the concentration of the EPS-water solution. Pb(II) always presents a higher affinity than Cd(II) for EPS. For the EPS extracted from pure bacterial strains, only one global binding constant from a simple equilibrium sorption model, may be used to assess the effect of microbial products such as EPS on Cd(II) and Pb(II) speciation or mobility in the environment. However, for EPS extracted from activated sludges, the wide variation of the global binding constants determined for Cd(II) and Pb(II) do not permit such a simple approach. The differences in sorption to metals between the two types of EPS (bacterial, activated sludges) could be explained by the differences in EPS composition: organic macromolecules, as well as the nature of the mineral fraction.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Guibaud G,van Hullebusch E,Bordas F,d'Abzac P,Joussein Edoi
10.1016/j.biortech.2009.01.040subject
Has Abstractpub_date
2009-06-01 00:00:00pages
2959-68issue
12eissn
0960-8524issn
1873-2976pii
S0960-8524(09)00065-0journal_volume
100pub_type
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