A study of the effects of competing ions on the biosorption of metals

Tsezos, M.; Remoudaki, E.; Angelatou, V.

doi:10.1016/s0964-8305(96)00011-x

Cited by 69 publications

(27 citation statements)

References 12 publications

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“…Biosorption, which is based on the ability of different kinds of microbial biomass to bind heavy metals, has been well established and identified as potential alternative to the conventional metal removal technologies [1][2][3]. Biosorption may involve a combination of mechanisms such as ion exchange, microprecipitation, electrostatic interaction, complexation, etc., and a number of functional charged groups have been identified to play a vital role in binding the metals.…”

Section: Introductionmentioning

confidence: 99%

Biosorption of Lead, Copper, and Cadmium by Phanerochaete chrysosporium in Ternary Metal Mixtures: Statistical Analysis of Individual and Interaction Effects

Pakshirajan

Swaminathan

2009

Appl Biochem Biotechnol

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Biosorption of three divalent metals, viz., lead, copper, and cadmium in ternary aqueous mixtures was studied using Phanerochaete chrysosporium in batch shake flasks. The mixtures were prepared containing the metals at their either varying optimum or equal initial concentration combinations in aqueous solution of pH optimum to each of the metals. Following were the optimum initial concentration ranges of the metals in mixture: lead, 60-100 mg/L; copper, 20-60 mg/L; and cadmium, 5-15 mg/L. And, for varying these optimum concentration levels of the metals, a 2(3) full factorial design of experiments was employed. The results revealed that an increase in lead and cadmium concentrations helped in their better biosorption by the fungus, but an increase in initial copper concentration slightly diminished its removal. Statistical analysis of the results in the form of analysis of variance and Student t test gave a clear interpretation on the roles of both the individual metals and their interactions in the uptake of metals from mixture. Compared to the uptake of metals when presented individually, lead biosorption in mixture was found to be enhanced to a degree as high as 99%; on the other hand, copper and cadmium removals from mixtures were inhibited to the extent of 100% and 98%, respectively. However, this extent of inhibition or enhancement in the metal removals compared to the individual removals was less in mixtures containing all equal concentrations of the metals.

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Section: Introductionmentioning

confidence: 99%

Biosorption of Lead, Copper, and Cadmium by Phanerochaete chrysosporium in Ternary Metal Mixtures: Statistical Analysis of Individual and Interaction Effects

Pakshirajan

Swaminathan

2009

Appl Biochem Biotechnol

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“…The inhibitory effect brought about by the presence of another cation in solution may be somehow predicted on the basis of the difference in their class behaviour, as suggested by Nieboer and McBryde (1973). Metal ions can accordingly be grouped into class ''a'', ''b'' or borderline ions, on the basis of their covalent indices; both metals used in our study are borderline ions, and Tsezos et al (1996) claimed that ionic competition is greater (and thus more unfavourable) between metals belonging to the same class. Studies reported by Fraile et al (2005) encompassing the simultaneous removal of Zn 2?…”

Section: Resultsmentioning

confidence: 63%

Capacity of simultaneous removal of zinc and cadmium from contaminated media, by two microalgae isolated from a polluted site

2011

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Several aquatic environments have been contaminated with heavy metals dumped via industrial effluents. Numerous studies have been published regarding the removal of single metals from aqueous solutions by microalgal biomass. However, such studies do not reflect the actual problem associated with industrial effluents because usually more than one metal species is present. Here we studied the biosorption capacity of Zn 2? and Cd 2? as single-and binarymetal systems by two microalgae, Scenedesmus obliquus and Desmodesmus pleiomorphus, isolated from a polluted site in Northern Portugal. For each metal independently, D. pleiomorphus showed a higher metal sorption capacity than S. obliquus, at concentrations ranging from 60 to 300 mg/l (except 150 mg Cd /l). Maximum amounts of Zn 2? and Cd 2? removed were 22.3 and 60.8 mg/g by S. obliquus, and 83.1 and 58.6 mg/g by D. pleiomorphus. In binary-metal solutions, S. obliquus was in general able to remove Zn 2? to higher extents than Cd 2? , whereas the opposite was observed with D. pleiomorphus. The simultaneous uptake of Zn 2? and Cd 2? by both microalgae was considerably lower than that of their single-metal counterparts, at equivalent concentrations. Although microalgal uptake from binary-metal solutions was lower than from single-metal ones, the wild microalgae selected were able to efficiently take up mixtures of Zn 2? and Cd 2? up to 300 mg/l of both metals-thus materializing a promising bioremediation vector for polluted waters.

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“…Scandium(III) biosorption by various microorganisms could be decreased by 56 to 94% in the presence of Al 3+ , Fe 3+ , Ti 3+ (Karavaiko et al 1996). Tsezos et al (1996) have studied the effect of competing ions on the biosorption of metals in relation to their Pearson's classification (soft, hard and borderline species). Significant ionic competition effect was observed for metals belonging to the same class of the hard and soft classification.…”

Section: Effects Of Competing Ionsmentioning

confidence: 99%

Removal of Rare Earth Elements and Precious Metal Species by Biosorption

Andrès

Gérente

2011

Microbial Biosorption of Metals

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In Rare Earth Elements (REE) or Precious Metal Species (PMS) removal many types of biological phenomena can take place, such as biosorption, bioaccumulation, resistance/detoxification mechanisms, and direct or indirect utilization in the microbial metabolism. The high demand for the REE or PMS implies demand on increased production of ores containing REE or PMS (i.e. mining) and recycling of solutions to recover the elements contained in waste. But the use of REE and PMS in many anthropogenic applications and devices has led to an increased of public and environment exposure. The aim of this chapter is to compare under different operating conditions, the biosorption capacities of various microbial species and natural by-products for rare earth elements, to investigate the involved sorption mechanisms and to evaluate the potential industrial use of this process to metal ion removal.

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A study of the effects of competing ions on the biosorption of metals

Cited by 69 publications

References 12 publications

Biosorption of Lead, Copper, and Cadmium by Phanerochaete chrysosporium in Ternary Metal Mixtures: Statistical Analysis of Individual and Interaction Effects

Biosorption of Lead, Copper, and Cadmium by Phanerochaete chrysosporium in Ternary Metal Mixtures: Statistical Analysis of Individual and Interaction Effects

Capacity of simultaneous removal of zinc and cadmium from contaminated media, by two microalgae isolated from a polluted site

Removal of Rare Earth Elements and Precious Metal Species by Biosorption

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