Cation-exchange capacity of algae and cyanobacteria: A parameter of their metal sorption abilities

Pirszel, Jacek; Pawlik, B.; Skowroñski, Tadeusz

doi:10.1007/bf01569945

Cited by 22 publications

(8 citation statements)

References 12 publications

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“…In soils above pH 7 (true for most desert soils), cation exchange capacity is significantly increased by all microbial species (Gadd, 1990a;Pirszel et al, 1995). Polysaccharide production can be simulated by soil Mg, K, and Ca.…”

Section: Discussionmentioning

confidence: 98%

The influence of biological soil crusts on mineral uptake by associated vascular plants

Harper

Belnap

2001

Journal of Arid Environments

170

107

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Section: Discussionmentioning

confidence: 98%

The influence of biological soil crusts on mineral uptake by associated vascular plants

Harper

Belnap

2001

Journal of Arid Environments

170

107

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“…Initial binding may also be followed by inorganic deposition of an increased amount of metal. Particulate material can bind to crustal organisms (e.g., sulfides of copper, Zn, Pb, zinc dust, magnesic oxide, and ferric hydroxide ;Lange 1974;Gadd 1990a,b;McLean and Beveridge 1990;Pirszel et al 1995). Most adsorbed metals stay on or within the extracellular sheath, and are not absorbed by the cells, thus remaining available to plants (Geesey and Jang 1990).…”

Section: Carbon C:n Ratios and Organic Mattermentioning

confidence: 98%

Influence of Biological Soil Crusts on Soil Environments and Vascular Plants

Belnap¹,

Prasse²,

Harper³

2001

Ecological Studies

117

110

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“…The Cu(II) adsorption capacity at pH 7.0 was 10.77 mol m Ϫ2 , equivalent to 0.829 mmol per g of dried spores, which is the same order of magnitude as the Cu(II) adsorption capacities of various biomasses, such as bacteria, algae, fungi (20). Pirszel et al (26) reported that the ionexchange capacities were 0.825 mmol g of dry weight Ϫ1 for cells for Anacystis nidulans (a cyanobacterium), 0.205 mmol g Ϫ for Synechocystis aquatilis (a cyanobacterium), 0.260 mmol g Ϫ1 for Stichococcus bacillaris (a green alga), and 0.041 mmol g Ϫ1 for Vaucheria sp. (a macroalga).…”

Section: Resultsmentioning

confidence: 86%

Surface Charge Properties of and Cu(II) Adsorption by Spores of the Marine Bacillus sp. Strain SG-1

Tebo

1998

Appl Environ Microbiol

129

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Spores of marine Bacillus sp. strain SG-1 are capable of oxidizing Mn(II) and Co(II), which results in the precipitation of Mn(III, IV) and Co(III) oxides and hydroxides on the spore surface. The spores also bind other heavy metals; however, little is known about the mechanism and capacity of this metal binding. In this study the characteristics of the spore surface and Cu(II) adsorption to this surface were investigated. The specific surface area of wet SG-1 spores was 74.7 m2 per g of dry weight as measured by the methylene blue adsorption method. This surface area is 11-fold greater than the surface area of dried spores, as determined with an N2 adsorption surface area analyzer or as calculated from the spore dimensions, suggesting that the spore surface is porous. The surface exchange capacity as measured by the proton exchange method was found to be 30.6 μmol m−2, which is equal to a surface site density of 18.3 sites nm−2. The SG-1 spore surface charge characteristics were obtained from acid-base titration data. The surface charge density varied with pH, and the zero point of charge was pH 4.5. The titration curves suggest that the spore surface is dominated by negatively charged sites that are largely carboxylate groups but also phosphate groups. Copper adsorption by SG-1 spores was rapid and complete within minutes. The spores exhibited a high affinity for Cu(II). The amounts of copper adsorbed increased from negligible at pH 3 to maximum levels at pH >6. Their great surface area, site density, and affinity give SG-1 spores a high capability for binding metals on their surfaces, as demonstrated by our experiments with Cu(II).

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Cation-exchange capacity of algae and cyanobacteria: A parameter of their metal sorption abilities

Cited by 22 publications

References 12 publications

The influence of biological soil crusts on mineral uptake by associated vascular plants

The influence of biological soil crusts on mineral uptake by associated vascular plants

Influence of Biological Soil Crusts on Soil Environments and Vascular Plants

Surface Charge Properties of and Cu(II) Adsorption by Spores of the Marine Bacillus sp. Strain SG-1

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