Abstract
Microbial biomass represents a potentially cost-effective sorbent for water treatment applications. High sorption capacities for both cations and anions are demonstrated here for viable and autoclaved cell suspensions of the Gram-negative bacterium Shewanella putrefaciens. FTIR absorption spectra and pHdependent zeta-potentials are similar for the viable and killed bacterial cells. Potentiometric titrations, however, reveal a two to three times higher OH- buffering capacity for the living cells. The Cu2+ sorption capacity of the viable cells is also about twice that of the autoclaved cells. Sorption of fluoride and phosphate is not pH-dependent, although an initial addition of acid or base was needed to activate the anion binding sites. Uptake of fluoride is comparable for viable and killed cells.
Original language | English |
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Pages (from-to) | 126-133 |
Number of pages | 8 |
Journal | Colloids and Surfaces B: Biointerfaces |
Volume | 65 |
Issue number | 1 |
DOIs | |
Publication status | Published - Aug 2008 |
Keywords
- biosorption
- bio-engineering
- Shewanella putrefciens
- bioremediation