Journal ArticleDOI
Metal accumulation by fungi: Applications in environmental biotechnology
TLDR
Fungi can accumulate metal and radionuclide species by physico-chemical and biological mechanisms including extracellular binding by metabolites and biopolymers, binding to specific polypeptides and metabolism-dependent accumulation.Abstract:
Fungi can accumulate metal and radionuclide species by physico-chemical and biological mechanisms including extracellular binding by metabolites and biopolymers, binding to specific polypeptides and metabolism-dependent accumulation. Biosorptive processes appear to have the most potential for environmental biotechnology. ‘Biosorption’ consists of accumulation by predominatly metabolism-independent interactions, such as adsorptive or ion-exchange processes: the biosorptive capacity of the biomass can be manipulated by a range of physical and chemical treatments. Immobilized biomass retains biosorptive properties and possesses a number of advantages for process applications. Native or immobilized biomass can be used in fixed-bed, air-lift or fluidized bed bioreactors; biosorbed metal/radionuclide species can be removed for reclamation and the biomass regenerated by simple chemical treatments.read more
Citations
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Journal ArticleDOI
Biosorption: critical review of scientific rationale, environmental importance and significance for pollution treatment
TL;DR: Biosorption is a physico-chemical process and includes such mechanisms as absorption, adsorption, ion exchange, surface complexation and precipitation as discussed by the authors, which has been heralded as a promising biotechnology for pollutant removal from solution, and/or pollutant recovery.
Journal ArticleDOI
Microbial influence on metal mobility and application for bioremediation
TL;DR: This contribution will outline selected microbiological processes which are of significance in determining metal mobility and which have actual and potential application in bioremediation of metal pollution.
Book ChapterDOI
Fungal production of citric and oxalic acid: importance in metal speciation, physiology and biogeochemical processes.
TL;DR: The physiology and chemistry of citric and oxalic acid production in fungi are discussed, the intimate association of these acids and processes with metal speciation, physiology and mobility, and their importance and involvement in key fungal-mediated processes, including lignocellulose degradation, plant pathogenesis and metal biogeochemistry.
Journal ArticleDOI
Biosorption of cadmium(II), lead (II) and copper(II) with the filamentous fungus Phanerochaete chrysosporium.
TL;DR: The experimental biosorption data for Cd(II), Pb( II) and Cu(II) ions were in good agreement with those calculated by the Langmuir model.
Journal ArticleDOI
Biosorption of heavy metal ions on immobilized white-rot fungus Trametes versicolor.
TL;DR: Biosorption equilibrium was established in about 1.0h and the equilibrium was well described by Langmuir and Freundlich isotherms, and a temperature change in the range of 15-45 degrees C did not affect the biosorption capacity.
References
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Journal ArticleDOI
Interactions of fungip with toxic metals
TL;DR: The use of fungal biomass for the detoxification of metal/radionuclide-containing industrial effluents is of biotechnological potential (Gadd, 1990, 1992a) as discussed by the authors.
Journal ArticleDOI
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.
Journal ArticleDOI
Microbial treatment of metal pollution — a working biotechnology?
Geoffrey M. Gadd,C. White +1 more
TL;DR: To date, the most successful biotechnological processes utilize biosorption and bioprecipitation, but other processes such as binding by specific macromolecules may have future potential.
Journal ArticleDOI
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.
Journal ArticleDOI
The removal of Cu(II) from dilute aqueous solutions by Saccharomyces cerevisiae
TL;DR: In this paper, the authors showed that a sand column with immobilized S. cerevisiae can be stripped of adsorbed Cu(II) with one volume of acid (5 × 10−3 M HClO4) per 20 volumes of solution.