Mobilization and accumulation of sediment bound heavy metals by algae

Laube, V. M.; Ramamoorthy, S.; Kushner, D. J.

doi:10.1007/bf01685502

Cited by 30 publications

(12 citation statements)

References 13 publications

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“…Over a 4 h incubation period, the majority of metal taken up was via the first phase, although over a longer time period, the second, energy-dependent phase could become more significant. This may explain the results of studies such as that by Laube et al [23] where greater uptake of copper and cadmium was obtained with cyanobacteria than with natural sediment over a 12 h incubation period.…”

Section: Discussionsupporting

confidence: 71%

“…There are, however, some studies of metal accumulation using sediments sampled from the aquatic environment and of the transfer of metals from such sediments to microalgae using a two chambered apparatus [1,21,23]. In addition, metal accumulation by mixtures/aggregates of bacterial cell walls and clay minerals has been studied by Walker et al [31 ] and Flemming et al [ 14].…”

Section: Introductionmentioning

confidence: 99%

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Uptake of cobalt and cesium by microalgal- and cyanobacterial-clay mixtures

1993

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Accumulation of cobalt and cesium by the microalga Scenedesmus obliquus and the cyanobacterium Synechocystis PCC 6803 has been characterized at metal concentrations ranging from 1-100 µM in the presence of three clay minerals, montmorillonite, illite, and kaolinite. The majority of metal uptake over a 4 h period consisted of rapid binding to the clay mineral-cell aggregates, and was unaffected by incubation in the dark or by the presence of the metabolic inhibitor carbonyl cyanide-3-chlorophenyl hydrazone (CCCP). This was followed by a slower, energy-dependent uptake of metal by the cell components of the mixtures, which was inhibited by incubation in the dark or in the presence of CCCP. The initial phase of uptake by the clay mineral-cell mixtures and mixture components alone conformed to a Freundlich adsorption isotherm, the order of uptake for both cobalt and cesium being montmorillonite-cells > illite-cells > kaolinite-cells. S. obliquus-clay mineral mixtures accumulated more cobalt and cesium than Synechocystis PCC 6803-clay mineral mixtures. On a dry weight basis, clay minerals alone accumulated greater amounts of metals than clay mineral-cell mixtures, which accumulated more than the cells alone. However, when the same data was expressed as amount of metal adsorbed per unit surface area, S. obliquus, in most cases, adsorbed greater amounts of cobalt and cesium than the clay minerals or Synechocystis PCC 6803. As the proportion of clay in a cell-clay mineral mixture was increased, the amount of metal accumulated also increased. Reduced accumulation of cobalt and cesium by cell-clay mineral mixtures, exhibited by equal amounts of the individual components added together, indicated that the formation of clay-cell aggregates had masked some of the binding sites normally available to metal ions. Accumulation of cobalt and cesium by all clay mineral-cell mixtures was dependent on the external pH and NaCl concentration, and decreased with decreasing pH and increasing external NaCl concentration.

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Section: Discussionsupporting

confidence: 71%

Section: Introductionmentioning

confidence: 99%

Uptake of cobalt and cesium by microalgal- and cyanobacterial-clay mixtures

1993

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“…The uptake of copper by Anabaena 7120, a blue-green, and Ankistrodesmus braunii, a green alga, and sediment was studied by Laube et al 186 The sediment was composed of poorly crystallized kaolite and illite with a mean grain size of 0.35 mm and 18.58 mEq/100 g (dry weight) cation exchange capacity. Experiments were carried out in dialysis sacs suspended in Ottawa River water.…”

Section: K Accumulation Of Copper By Algae and Aquatic Macrophytesmentioning

confidence: 99%

Effects of copper on humans, laboratory and farm animals, terrestrial plants, and aquatic life

Demayo¹,

Taylor²,

Taylor³

et al. 1982

C R C Critical Reviews in Environmental Control

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“…With wide sources, many kinds of adsorbents can adsorb heavy metals [4][5][6][7] , beer yeast is one kind of this [8][9][10] . At present, static adsorption is mainly studied, few on dynamic adsorption process in domestic.…”

Section: Introductionmentioning

confidence: 99%

Study on Pyrolytic Characteristics of Dead Yeast Powder and Biosorption Mechanism on Cu²+

Fan

Dong

Diao

et al. 2008

2008 2nd International Conference on Bioinformatics and Biomedical Engineering

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Pyrolysis process of dead beer yeast powder was studied through thermogravimetric analyzer. Cu 2+ adsorption mechanism was analysed by SEM and FTIR. The results showed: in thermogravimetric test, TG and DTG figures indicated five pyrolytic stages, weight losting in the third(247 -309 ) and fourth(309 -420 ) stages, most important stages, accounted for 68.3% of total weight losting and 50.5% of total sample weight. SEM figures indicated that before adsorption on Cu 2+ , the cell surface of yeast powder and immobilized yeast were smooth, but after adsorption, many "spots" and something like spininess deposition appeared on cell surface, inorganicprecipitation mechanism and redox mechanism might work in the process. After adsorption, FTIR figures changed little, the main structure and components of yeast kept unchanged, -OH -CONH 2 and -COOH all played an important role in adsorption process.

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Mobilization and accumulation of sediment bound heavy metals by algae

Cited by 30 publications

References 13 publications

Uptake of cobalt and cesium by microalgal- and cyanobacterial-clay mixtures

Uptake of cobalt and cesium by microalgal- and cyanobacterial-clay mixtures

Effects of copper on humans, laboratory and farm animals, terrestrial plants, and aquatic life

Study on Pyrolytic Characteristics of Dead Yeast Powder and Biosorption Mechanism on Cu²+

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Mobilization and accumulation of sediment bound heavy metals by algae

Cited by 30 publications

References 13 publications

Uptake of cobalt and cesium by microalgal- and cyanobacterial-clay mixtures

Uptake of cobalt and cesium by microalgal- and cyanobacterial-clay mixtures

Effects of copper on humans, laboratory and farm animals, terrestrial plants, and aquatic life

Study on Pyrolytic Characteristics of Dead Yeast Powder and Biosorption Mechanism on Cu&#x000B2;+

Contact Info

Product

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Study on Pyrolytic Characteristics of Dead Yeast Powder and Biosorption Mechanism on Cu²+