Mechanism of cadmium binding on the cell wall of an acidophilic bacterium
Abstract
Under certain conditions bacteria can act as a good biosorbent for different toxic heavy metals. However, no study on this aspect has been reported in case of acidophilic, heterotrophic, Gram-negative Acidiphilium strains, which are mostly resistant to several heavy metals. FTIR, SEM, TEM along with sorption experiments using bacterial cells of Acidiphilium symbioticum H8 were conducted to establish the mechanism of Cd(2+) ion sorption. The anionic functional groups present in the cell envelop were the components primarily responsible for the metal-binding capability of the bacterium. Sorption experiments further confirmed that 248.62 mg of cadmium was adsorbed per gram biomass at pH 6.0. The process can better be explained by Langmuir-Freundlich dual isotherm model. Blocking of the functional groups by chemical modification suggested that the binding of cadmium on the biomass occurs through electrostatic reaction and complex formation. Accumulation of cadmium on the cell envelop was supported by fine structure study.
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Under certain conditions, bacteria have a good sorption effect on different toxic heavy metals.
“Under certain conditions, bacteria have a good sorption effect on different toxic heavy metals (Chakravarty and Banerjee 2012).”
From Modified biochar: synthesis and mechanism for removal of environmental heavy metals (2022) · cites this paper as Chakravarty and Banerjee 2012
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Modified biochar: synthesis and mechanism for removal of environmental heavy metals
Liu, Z., Xu, Z., Xu, L., Buyong, F., Chay, T. C., Li, Z., Cai, Y., Hu, B., Zhu, Y., & Wang, X. (2022) · Carbon Research · doi:10.1007/s44246-022-00007-3 · Cited by 426 · see citing works
- Authors
- Chakravarty, R., & Banerjee, P. C.
- Affiliations
- Indian Institute of Chemical Biology (IN)
- Corresponding author
- Chakravarty, Rajdeep
- Venue
- Bioresource Technology
- Publisher
- Elsevier BV
- Published
- 2012-03
- Volume
- 108
- Pages
- 176-183
- ISSN
- 0960-8524 (ISSN-L)
- OpenAlex
- W2090437821
- Cited by
- 184
- References
- 35
- Citations by year
- 2026: 4 · 2025: 10 · 2024: 20 · 2023: 17 · 2022: 21 · 2021: 21 · 2020: 17 · 2019: 16 · 2018: 13 · 2017: 8 · 2016: 11 · 2015: 7 · 2014: 10 · 2013: 7 · 2012: 1
- FWCI
- 7.26
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Bioresource Technology (publishedVersion)
- PubMed (publishedVersion)
- Funders
- Council of Scientific and Industrial Research, India
- Topics
- Physical Sciences › Environmental Science › Water Science and Technology › Adsorption and biosorption for pollutant removal
- Physical Sciences › Environmental Science › Water Science and Technology › Heavy Metal Pollution Remediation
- Physical Sciences › Environmental Science › Pollution › Heavy metals in environment
- Keywords
- cadmium biosorption, acidophilic bacteria, bacterial cell wall, heavy metal adsorption, Sips isotherm, electrostatic binding, metal complexation, heavy metal resistance
- MeSH terms
- Adsorption, Biodegradation, Environmental, Cadmium, Cell Wall, Environmental Pollutants, Hydrogen-Ion Concentration, Microscopy, Electron, Scanning, Models, Biological, Temperature, Spectroscopy, Fourier Transform Infrared, Acidiphilium, Microscopy, Electron, Transmission, Static Electricity
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