Effect of cultivation and experimental conditions on the surface reactivity of the metal-resistant bacteria Cupriavidus metallidurans CH34 to protons, cadmium and zinc

Guiné, Véronique; Martins, Jean M.F.; Causse, Benjamin; Durand, Amandine; Gaudet, Jean‐Paul; Spadini, Lorenzo

doi:10.1016/j.chemgeo.2006.10.001

Cited by 40 publications

(23 citation statements)

References 41 publications

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“…The binding capacities of diatom surfaces with cadmium and lead (100-500 lmol/g dry weight) are in agreement with recent measurements of Klimmek et al (2001) on 30 green algae (50-340 lmol Cd/g dry weight and 20-850 lmol Pb/g dry weight) and diatom (230 lmol Cd/g dry weight and 360 lmol Pb/g dry weight) as well as with results on bacteria (Lamelas et al, 2006;Guiné et al, 2007;Gélabert, 2005 and references therein). The order of Cd and Pb binding affinity to diatoms cell wall (SC > NMI-N > AMIN > TW) follows the trend established earlier for Zn (Gélabert et al, 2006b), in agreement with carboxylate group concentration in the surface layers (Gélabert et al, 2004).…”

Section: Discussionsupporting

confidence: 87%

Cadmium and lead interaction with diatom surfaces: A combined thermodynamic and kinetic approach

Gélabert

Pokrovsky

Schott

et al. 2007

Geochimica et Cosmochimica Acta

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Section: Discussionsupporting

confidence: 87%

Cadmium and lead interaction with diatom surfaces: A combined thermodynamic and kinetic approach

Gélabert

Pokrovsky

Schott

et al. 2007

Geochimica et Cosmochimica Acta

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“…Dead cells no longer metabolise and the proton motive force that effluxes protons to the cell surface does not operate, consequently, there is less competition for platinum to bind to anionic carboxyl groups [59]. The ionic adsorption of cations to dead C. metallidurans cells is known to be higher than the reactivity of live cells [41]. In this situation, the appearance of new reactive sites from denatured cell membranes and lysed cytoplasmic contents likely contributed to the continued immobilisation of platinum, even when cell death was 'instantaneous'.…”

Section: Discussionmentioning

confidence: 99%

“…This study employed the use of Cupriavidus metallidurans CH34: an aerobic, gram-negative, facultative chemolithoautotrophic, rod-shaped β-Proteobacterium known for being resistant to the toxic effects of a number of metallic cations, e.g., Cu, Pb, Zn, Cd, Ag and Au [9,14,[41][42][43]. Resistance is primarily facilitated by metal transporting ATPase efflux proteins in the cell envelope and cation reduction mechanisms in the cytoplasm, which have been shown to confer metal immobilisation [6,9,44].…”

Section: Introductionmentioning

confidence: 99%

Immobilisation of Platinum by Cupriavidus metallidurans

et al. 2018

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Abstract:The metal resistant bacterium Cupriavidus metallidurans CH34, challenged with aqueous platinous and platinic chloride, rapidly immobilized platinum. XANES/EXAFS analysis of these reaction systems demonstrated that platinum binding shifted from chloride to carboxyl functional groups within the bacteria. Pt(IV) was more toxic than Pt(II), presumably due to the oxidative stress imparted by the platinic form. Platinum immobilisation increased with time and with increasing concentrations of platinum. From a bacterial perspective, intracellular platinum concentrations were two to three orders of magnitude greater than the fluid phase, and became saturated at almost molar concentrations in both reaction systems. TEM revealed that C. metallidurans was also able to precipitate nm-scale colloidal platinum, primarily along the cell envelope where energy generation/electron transport occurs. Cells enriched in platinum shed outer membrane vesicles that were enriched in metallic, colloidal platinum, likely representing an important detoxification strategy. The formation of organo-platinum compounds and membrane encapsulated nanophase platinum, supports a role for bacteria in the formation and transport of platinum in natural systems, forming dispersion halos important to metal exploration.

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“…Microorganisms have complex structures and diverse cell products, this result the complexity of adsorption processes and diversity of mechanisms, and make the biosorption of heavy metals quite different from conventional physical-chemical adsorption. The studies regarding adsorption of heavy metals by microorganisms have been conducted in the areas of strain screening (Pal et al 2006;Pumpel et al 1995;Tsuruta 2006), adsorption efficiency (Gabr et al 2009;Lopez et al 2002;Mamba et al 2009), adsorption mechanisms and models (Gabr et al 2009;Kularatne et al 2009), effect factors (Guine et al 2007;Takenaka et al 2007;Willow and Cohen 2003), adsorbent immobilization (Gabr et al 2009;Lopez et al 2002;Zhou et al 2009), etc. However, detailed mechanisms for heavy metals adsorption by microorganisms have not been fully studied (Gadd 2009).…”

Section: Introductionmentioning

confidence: 99%

Hg(II) adsorption by Bacillus mucilaginosus: mechanism and equilibrium parameters

Bin-bin

Lian

2010

World J Microbiol Biotechnol

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Our previous findings have indicated that Bacillus mucilaginosus might be a promising biosorbent. However, up to now, few studies have been performed to examine the use of B. mucilaginosus as a sorbent, especially as a sorbent for Hg(II). The aim of the current study was to investigate the adsorption of Hg(II) by B. mucilaginosus and the underlying mechanism involved. The results showed that B. mucilaginosus exhibited effective adsorption of Hg(II), and the experimental data were well fitted by the Langmuir model with equilibrium constant of 3.32 9 10 4 M -1 and maximum adsorption capacity of 393 mg(Hg)/l(bacterial culture). The average saturated adsorption amount of Hg(II) by each cell was 9.83 9 10 9 atoms, with time to reach adsorption equilibrium less than 10 min. The adsorption efficiency was mainly dependent on pH. Surface adsorption of capsules was identified to be the major mechanism for the biosorption of Hg(II) by B. mucilaginosus, which might be associated with the cell products on the surface of capsules of B. mucilaginosus. Differences observed in adsorption behaviors at different concentrations of Hg(II) were well explained using the Visual minTEQ software. Our findings might shed some lights on the application of B. mucilaginosus as an adsorbent for Hg(II) and other heavy metals.

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Effect of cultivation and experimental conditions on the surface reactivity of the metal-resistant bacteria Cupriavidus metallidurans CH34 to protons, cadmium and zinc

Cited by 40 publications

References 41 publications

Cadmium and lead interaction with diatom surfaces: A combined thermodynamic and kinetic approach

Cadmium and lead interaction with diatom surfaces: A combined thermodynamic and kinetic approach

Immobilisation of Platinum by Cupriavidus metallidurans

Hg(II) adsorption by Bacillus mucilaginosus: mechanism and equilibrium parameters

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