Journal ArticleDOI
Heavy metal accumulation by bacteria and other microorganisms
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TLDR
Many aspects of metal-microbe interactions remain unexploited in biotechnology and further development and application is necessary, particularly to the problem of radionuclide release into the environment.Abstract:
Bacteria, and other microorganisms, exhibit a number of metabolism-dependent and-independent processes or the uptake and accumulation of heavy metals and radionuclides. The removal of such harmful substances from effluents and waste waters by microbe-based technologies may provide an alternative or additional means of metal/radionuclide recovery for economic reasons and/or environmental protection. Both living and dead cells as well as products derived from or produced by microorganisms can be effective metal accumulators and there is evidence that some biomass-based clean-up processes are economically viable. However, many aspects of metal-microbe interactions remain unexploited in biotechnology and further development and application is necessary, particularly to the problem of radionuclide release into the environment.read more
Citations
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Toxicity of heavy metals to microorganisms and microbial processes in agricultural soils: a review.
TL;DR: In this article, a hypothesis is formulated to explain how microorganisms may become affected by gradually increasing soil metal concentrations and this is discussed in relation to defining safe or critical soil metal loadings for soil protection.
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Cadmium-tolerant plant growth-promoting bacteria associated with the roots of Indian mustard (Brassica juncea L. Czern.).
Andrey A. Belimov,Nikos Hontzeas,Vera I. Safronova,S. V. Demchinskaya,Giovanna Piluzza,Simonetta Maria Bullitta,Bernard R. Glick +6 more
TL;DR: A positive correlation between the in vitro ACC deaminase activity of the bacteria and their stimulating effect on root elongation suggested that utilization of ACC is an important bacterial trait determining root growth promotion.
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Microalgae - a promising tool for heavy metal remediation.
TL;DR: This review summarizes several areas of heavy metal remediation from a microalgal perspective and provides an overview of various practical avenues of this technology.
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The Past, Present, and Future Trends of Biosorption
TL;DR: A review of biosorption research can be found in this paper, where a range of subjects are covered, including the initial history, raw materials, mechanisms, instrumental tools, process factors, modification and immobilization methods, recovery and regeneration, continuous processes, commercial application, and modeling studies.
Journal ArticleDOI
Transfer of heavy metals through terrestrial food webs: a review
TL;DR: This review gathers studies of the community-level effects of heavy metal pollution, including heavy metal transfer from soils to plants, microbes, invertebrates, and to both small and large mammals (including humans).
References
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Microorganisms and Heavy Metal Toxicity
TL;DR: The environmental and microbiological factors that can influence heavy metal toxicity are discussed with a view to understanding the mechanisms of microbial metal tolerance.
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Uptake of Metal Ions by Rhizopus arrhizus Biomass
TL;DR: Rhizopus arrhizus biomass was found to absorb a variety of different metal cations and anions but did not absorb alkali metal ions, and it is proposed that the uptake mechanism involves electrostatic attraction to positively charged functional groups.
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Biosorption of uranium and thorium
Marios Tsezos,Bohumil Volesky +1 more
TL;DR: In this paper, selected samples of waste microbial biomass originating from various industrial fermentation processes and biological treatment plants have been screened for biosorbent properties in conjunction with uranium and thorium in aqueous solutions.
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Microbial Cells as Biosorbents for Heavy Metals: Accumulation of Uranium by Saccharomyces cerevisiae and Pseudomonas aeruginosa
TL;DR: Uranium accumulated extracellularly on the surfaces of Saccharomyces cerevisiae cells and Pseudomonas aeruginosa occurred intracellularly and was extremely rapid (<10 s), and no response to environmental parameters could be detected.
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The mechanism of uranium biosorption by Rhizopus arrhizus.
Marios Tsezos,Bohumil Volesky +1 more
TL;DR: The mechanism of uranium sequestering by this type of biomass was studied by using experimental techniques such as electron microscopy, x‐ray energy dispersion analysis, IR spectroscopy, and supporting evidence was obtained for a biosorption mechanism consisting of at least three processes.