NDLI: Effects of pH and ionic strength on the adsorption of Cs, Sr, Eu, Zn, Cd and Hg byPseudomonas putida

Content Provider	Springer Nature Link
Author	Ledin, M. Pedersen, K. Allard, B.
Copyright Year	1997
Abstract	Bacterial metal accumulation may influence the mobility and chemical form (speciation) of metals in the environment. The passive adsorption of six metals (Cs, Sr, Eu, Zn, Cd and Hg) by a soil bacterium,Pseudomonas putida, was studied in the present work, using a radiotracer batch-distribution technique. To replicate natural conditions, the adsorption was considered as a function of pH (4–10) and ionic strength (0.01 M and 0.1 M KCl) at a low metal concentration (10$^{−8}$ M).P. putida exhibited a total metal accumulating capacity of 200–1000 meq kg$^{−1}$ bacteria (dry weight) (measured in 0.01 M KCl at pH 6.4). This capacity is comparable to that of many organic soil components and it is above the capacity of most inorganic constituents. The following affinity order of adsorption was observed: Hg>Eu>Cd,Zn,Sr>Cs. The results indicate that the bacterial surface carries different sites that exhibit varying affinity and capacity for binding metal ions. It can be concluded that the overall adsorption of metals byP. putida is determined by several interacting processes related to the properties of both the metals and the bacterial surface and to the composition of the solution phase (pH as well as ionic strength).
Starting Page	367
Ending Page	381
Page Count	15
File Format	PDF
ISSN	00496979
Journal	Water, Air, and Soil Pollution
Volume Number	93
Issue Number	1-4
e-ISSN	15732932
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	1997-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	bacteria metals accumulation metal mobility Hydrogeology Environment Atmospheric Protection/Air Quality Control/Air Pollution Terrestrial Pollution Waste Water Technology Water Pollution Control Water Management Aquatic Pollution
Content Type	Text
Resource Type	Article
Subject	Ecological Modeling Environmental Chemistry Pollution Environmental Engineering Water Science and Technology

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