The DOI matches its Crossref record; 24 of the 24 references it cites were found in a registry or an index.
A chemical equilibrium model for metal adsorption onto bacterial surfaces
Open accessAbstract
This study quantifies metal adsorption onto cell wall surfaces of Bacillus subtilis by applying equilibrium thermodynamics to the specific chemical reactions that occur at the water-bacteria interface. We use acid/base titrations to determine deprotonation constants for the important surface functional groups, and we perform metal-bacteria adsorption experiments, using Cd, Cu, Pb, and Al, to yield site-specific stability constants for the important metal-bacteria surface complexes. The acid/base properties of the cell wall of B. subtilis can best be characterized by invoking three distinct types of surface organic acid functional groups, with pKa values of 4.82 ± 0.14, 6.9 ± 0.5, and 9.4 ± 0.6. These functional groups likely correspond to carboxyl, phosphate, and hydroxyl sites, respectively, that are displayed on the cell wall surface. The results of the metal adsorption experiments indicate that both the carboxyl sites and the phosphate sites contribute to metal uptake. The values of the log stability constants for metal-carboxyl surface complexes range from 3.4 for Cd, 4.2 for Pb, 4.3 for Cu, to 5.0 for Al. These results suggest that the stabilities of the metal-surface complexes are high enough for metal-bacterial interactions to affect metal mobilities in many aqueous systems, and this approach enables quantitative assessment of the effects of bacteria on metal mobilities.
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“the surface complexation modeling (SCM) approach, grounded in equilibrium thermodynamics through mass action expressions, has been extended beyond minerals to successfully model trace metal adsorption onto microbial surfaces (Fein et al., 1997(Fein et al., , 2005)), including marine cyanobacteria (Liu et al., 2015) and anoxygenic photosynthesizers (Martinez et al., 2016).”
From Trace elements at the intersection of marine biological and geochemical evolution (2016) · cites this paper as Fein et al., 1997
Citations
Cites
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Uptake and retention of metals by cell walls of Bacillus subtilis
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Research works printed but not linked: 1
- Daughney, 1997, A comparison of the thermodynamics of metal adsorption onto two gram-positive bacteria, Chem. Geol.
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Bacterial biosorbents and biosorption
Vijayaraghavan, K., & Yun, Y. (2008) · Biotechnology Advances · doi:10.1016/j.biotechadv.2008.02.002 · Cited by 1,914
Biosorption of heavy metals by Saccharomyces cerevisiae: A review
Wang, J., & Chen, C. (2006) · Biotechnology Advances · doi:10.1016/j.biotechadv.2006.03.001 · Cited by 1,391
Gadd, G. M. (2009) · Journal of Chemical Technology & Biotechnology · doi:10.1002/jctb.1999 · Cited by 1,287
Jeffries, P., Gianinazzi, S., Perotto, S., Turnau, K., & Barea, J. M. (2003) · Biology and Fertility of Soils · doi:10.1007/s00374-002-0546-5 · Cited by 1,091
Zhu, T., & Dittrich, M. (2016) · Frontiers in Bioengineering and Biotechnology · doi:10.3389/fbioe.2016.00004 · Cited by 744
Metadata
- Authors
- Fein, J. B., Daughney, C. J., Yee, N., & Davis, T. A.
- Affiliations
- University of Notre Dame (US)
- McGill University (CA)
- ORCID
- Yee, Nathan
- Venue
- Geochimica et Cosmochimica Acta
- Publisher
- Elsevier BV
- Published
- 1997-08
- Volume
- 61
- Issue
- 16
- Pages
- 3319-3328
- ISSN
- 0016-7037 (ISSN-L)
- OpenAlex
- W2020140234
- Cited by
- 709
- References
- 24
- Citations by year
- 2026: 12 · 2025: 10 · 2024: 10 · 2023: 18 · 2022: 18 · 2021: 13 · 2020: 18 · 2019: 22 · 2018: 31 · 2017: 25 · 2016: 37 · 2015: 34 · 2014: 30 · 2013: 27 · 2012: 31
- FWCI
- 30.04
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Licence
- Locations
- Geochimica et Cosmochimica Acta (publishedVersion, cc-by-nc-nd)
- Topics
- Physical Sciences › Environmental Science › Water Science and Technology › Adsorption and biosorption for pollutant removal
- Physical Sciences › Environmental Science › Pollution › Heavy metals in environment
- Physical Sciences › Environmental Science › Water Science and Technology › Heavy Metal Pollution Remediation
- Keywords
- metal adsorption, bacterial cell wall, Bacillus subtilis, chemical equilibrium model, stability constants, deprotonation constants, carboxyl groups, phosphate groups, hydroxyl groups, cadmium, copper, lead, aluminum, metal mobility, acid-base titration
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