Stability of bacterium-mercury complexes and speciation of soluble inorganic mercury species

Aller, A. J.; Lumbreras, J.M.; Robles, L. C.; Fernandez, G. M.

doi:10.1016/0003-2670(96)00167-5

Cited by 23 publications

(9 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Various microorganisms have been used as extractants, bacteria being one of the most recently employed for analytical purposes. In some applications, lyophilized bacterial cells were effectively adopted to preconcentrate metals (precious [9], alkaline-earth [10] and transition [11,12]) and metalloids [13] from aqueous solutions, with a particular emphasis on the ionic speciation. Nonetheless, speciation of organometals frequently required increased selectivity, paying special attention to the new possibilities of biological systems, and above all bacteria [14,15,16,17].…”

Section: Introductionmentioning

confidence: 99%

Fourier-transform infrared spectroscopic study of the interactions of selenium species with living bacterial cells

Feo

Castro

Robles

et al. 2004

Analytical and Bioanalytical Chemistry

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

Fourier-transform infrared spectroscopic study of the interactions of selenium species with living bacterial cells

Feo

Castro

Robles

et al. 2004

Analytical and Bioanalytical Chemistry

View full text Add to dashboard Cite

show abstract

“…The different microorganisms were studied for preconcentration and speciation of trace metals, including: selenium, 6,9,12,32,33 arsenic, 13 mercury, 14,15,18 chromium, 11,17 copper, 21 cadmium, 22,32 lead, 23 gold, 29 beryllium, 30,32 and others. Atomic absorption spectrometry, 9,11,12,14,17,20,[28][29][30][31][32][33] atomic emission spectrometry, 6,13,16,34 and anodic stripping voltammetry 35 have proven to be useful techniques for the determination of metals in these separation/preconcentration biological systems.…”

Section: Introductionmentioning

confidence: 99%

“…6 These properties can be used not only for removing heavy metals from environmental matrices but also for speciation analysis. [6][7][8][9][10][11][12][13][14][15][16][17][18] Recently, yeast are more widely used for this purpose owing to easy growth, nonhazard, great tolerance toward metals, and high binding capacity to the cell. 6,13,14,[17][18][19][20] An abundant source of potentially metal-sorbing biomass are marine algae.…”

Section: Introductionmentioning

confidence: 99%

Analytical Applications of Living Organisms for Preconcentration of Trace Metals and Their Speciation

Godlewska‐Żyłkiewicz¹

2001

Critical Reviews in Analytical Chemistry

View full text Add to dashboard Cite

Living organisms, naturally occurring in human environment, gained in the last decade, increasing interest in analytical chemistry. This review presents the application of bacteria, yeast, algae, and fungi for the preconcentration of heavy metals from environmental samples. The specific bonding sites on cell walls are responsible for the selective binding of different species of studied metals that permit the use of them as sorbents for speciation analysis purposes.

show abstract

“…[27][28][29] Only a few studies were done with fungi. Nakajima et al 30 have used two different fungi species, Penicillium chrysogonum and Penicillium lilacinum, for the adsorption of metal ions.…”

mentioning

confidence: 99%

“…12 Most studies using microorganisms for preconcentration and determination of trace metals and other species have been conducted by utilizing algae [19][20][21][22][23] , yeast 17,18,[23][24][25][26] , and bacteria. [27][28][29] Only a few studies were done with fungi. Nakajima et al 30 have used two different fungi species, Penicillium chrysogonum and Penicillium lilacinum, for the adsorption of metal ions.…”

mentioning

confidence: 99%

Determination of Trace Metals in Geological Samples by Atomic Absorption Spectrophotometry after Preconcentration by Aspergillus niger Immobilized on Sepiolite

1999

View full text Add to dashboard Cite

The uses of living and nonliving microorganisms for metal reclamation and remediation from heavy metalcontaining waste streams and sludges and for preconcentration of trace metals have recently increased. [1][2][3][4][5][6][7][8][9][10] Two types of metal binding to biomass-based materials can take place; these are passive binding in both living and nonliving cells by very rapid physical adsorption and/or ion exchange with the cell surface, and active binding in living cells by slower metal uptake as a result of metabolic activity. 11 Metal uptake by nonliving cells can occur through sorption processes involving proteins, polysaccharides, many functional groups such as amino, carboxylate, hydroxide, imidazole, sulfate and sulfihydryl groups, and biopolymers found in the cell wall. 5In comparison with the conventional ion-exchange resins, having a single functionality, microorganisms contain numerous functionalities. The polyfunctional groups in the microorganisms exhibit unique metal adsorption abilities, and have been successfully used for ion-selective binding and preconcentration. Microorganisms are capable of selectively sorbing specific metal ions from solutions containing a mixture of several metal ions. 12-18Free microorganisms exhibit poor binding abilities due to chemical attack and structural degradation.12 For that reason, the biomass has been encapsulated in a supporting matrix using alginate microbeads 13 , carrageenan gel 14 , silica-based polymers 15 , or immobilized onto a solid support such as controlled pore glass 16 and sepiolite. 17 The encapsulated and immobilized microorganisms show superior mechanical resistivity and enhanced metal binding capabilities, better chemical resistivity and freer use of them in column or fluidized bed experiments, compared with those of the free cells. 12Most studies using microorganisms for preconcentration and determination of trace metals and other species have been conducted by utilizing algae [19][20][21][22][23] , yeast 17,18,[23][24][25][26] , and bacteria. [27][28][29] Only a few studies were done with fungi. Nakajima et al. 30 have used two different fungi species, Penicillium chrysogonum and Penicillium lilacinum, for the adsorption of metal ions. They have found that these species have adsorbed uranium preferentially but with different affinity values. In their study, these fungi species have showed a different tendency for retention of heavy transition metals, although both of them have low adsorption capability for the mentioned metals. Maquieira et al. 31 have immobilized a fungus, Penicilium notatum, onto two different supports, controlled pore glass (CPG) and sand, by two different methods, covalent immobilization method and ultrasonic immobilization method, for the use in quantitative studies. They have found that both methods were successful for the immobilization of fungus. They also investigated a different method for 1251 ANALYTICAL SCIENCES DECEMBER 1999, VOL. 15 1999 © The Japan Society for Analytical Chemistry Determination of Trace Metal...

show abstract

Stability of bacterium-mercury complexes and speciation of soluble inorganic mercury species

Cited by 23 publications

References 37 publications

Fourier-transform infrared spectroscopic study of the interactions of selenium species with living bacterial cells

Fourier-transform infrared spectroscopic study of the interactions of selenium species with living bacterial cells

Analytical Applications of Living Organisms for Preconcentration of Trace Metals and Their Speciation

Determination of Trace Metals in Geological Samples by Atomic Absorption Spectrophotometry after Preconcentration by Aspergillus niger Immobilized on Sepiolite

Contact Info

Product

Resources

About