Study of the interaction between europium (III) and Bacillus subtilis: fixation sites, biosorption modeling and reversibility

Markai, S.; Andrès, Yves; Montavon, Gilles; Grambow, Bernd

doi:10.1016/s0021-9797(03)00096-1

Cited by 84 publications

(48 citation statements)

References 25 publications

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“…It can grow either photoautotrophically, heterotrophically or mixotrophically (Chojnacka and Noworyta, 2004). The cell wall of Spirulina is surrounded by a porous three-dimensional macromolecular network (Chojnacka et al, 2005) and consists of peptydoglycan, teichuronic acid, teichoic acid, polysaccharides and proteins (Schiewer and Wong, 2000), which display carboxylic, hydroxyl and phosphate groups (Aksu, 2002;Markai et al, 2003). The presence of anionic and cationic sites gives algal wall amphoteric properties and, depending on the pH, the groups are either protonated or deprotonated (Esposito et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

Bioaccumulation of Pb2+ and its effects on growth, morphology and pigment contents of Spirulina (Arthrospira) platensis

Arunakumara

Zhang

Song

2008

J. Ocean Univ. China

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A laboratory experiment was conducted to assess the bioaccumulation of Pb 2+ and its effects on growth, morphology and pigment contents of Spirulina (Arthrospira) platensis. The specimen cultured in Zarrouk liquid medium was treated with various initial metal concentrations (0, 5, 10, 30, 50 and 100 μg mL -1 ). The growth of S. platensis was adversely affected by Pb 2+ at high concentrations (30, 50 and 100 μg mL -1 ). However, at low concentrations (5 μg mL -1 ), Pb 2+ could stimulate its growth slightly. The pigment contents (chlorophyll α and β carotene) were decreased in a dose-dependent manner. The highest reductions (67% and 53% respectively in chlorophyll α and β carotene) were observed in 100 μg mL -1 treatment group. The LC 50 (96 h) of Pb 2+ was measured as 75.34 μg mL -1 . Apart from a few cases of filament breakages at elevated concentrations (50 and 100 μg mL -1 ), morphological abnormalities are not specific. Metal bioaccumulation increased with Pb 2+ concentrations, but decreased with exposure time. The maximum accumulated amount was 188 mg g -1 dry weight. The bioconcentration factor (BCF) reached to a peak at day 2, followed by a gradual reduction for all the exposure concentrations. S. platensis is able to tolerate considerably high Pb 2+ concentrations. Consequently it can be used as a potential species to remove heavy metal from contaminated waters.

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Section: Introductionmentioning

confidence: 99%

Bioaccumulation of Pb2+ and its effects on growth, morphology and pigment contents of Spirulina (Arthrospira) platensis

Arunakumara

Zhang

Song

2008

J. Ocean Univ. China

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“…Spirulina is a Gram negative bacterium, also considered as blue green microalgae. Components found in the cell wall of Spirulina, such as peptydoglycan, teichuronic acid, teichoic acid, polysaccharides and proteins [17] which display mainly carboxylic, hydroxyl and phosphate groups [18,19] may give algal wall binding properties. The cell wall of A. platensis has lots of negative carboxyl and phosphate groups, which are the dominant binding sites of toxic and metallic cations [20,21].…”

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confidence: 99%

Acoustic, electrochemical and microscopic characterization of interaction of Arthrospira platensis biofilm and heavy metal ions

Tekaya

Gammoudi

Braiek

et al. 2013

Journal of Environmental Chemical Engineering

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“…The biomass and the sorbate were agitated for 24 hours, as many authors have reported that the kinetics of metal uptake by microorganisms is a fast procedure (Markai et al, 2003;Daughney et al, 1998). It is a common practice, 24 hours to be considered as a safe and adequate period of time in order equilibrium to be attained, whenever kinetic experiments are not carried out.…”

Section: Sorption Experimentsmentioning

confidence: 99%

Effect of growth conditions on biosorption of cadmium and copper by yeast cells

Anagnostopoulos

Symeopoulos²,

Soupioni³

2013

Global NEST Journal

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The dependence of Cd(II) and Cu(II) uptake by yeast cells on the age and temperature of cell culture was studied. Saccharomyces cerevisiae, Kluyveromyces marxianus and Debaromyces Hansenii were chosen as typical yeasts, while Cd(II) and Cu(II) as typical metal pollutants. Our results revealed that higher metal uptake was obtained by cells grown at the optimum temperature (30 o C) of cell culture. It was also found that the exponential phase cells resulted in a higher metal uptake than the stationary ones. A first interpretation of relevant bibliographic data concerning the effect of growth phase on metal uptake is proposed, assuming that limited qualitative changes in the cell wall structure take place as the cells pass from exponential to stationary phase, in addition to quantitative modifications, which have been reported in the literature. According to our interpretation the relative abundance among quantitative and qualitative alterations of cell wall, determines if stationary or exponential cells attain the higher metal binding capacity. An indication supporting our approach may be the fact that our hypothesis implies a decrease of pK a values of cell wall carboxyl groups with the age of cells, which is consistent with data reported by other authors. KEYWORDS: uptake, removal, Saccharomyces cerevisiae, Kluyveromyces marxianus, Debaromyces Hansenii, growth phase, growth temperature. INTRODUCTIONWater pollution, due to heavy metals, is a serious worldwide problem. Cadmium is a heavy metal, which poses serious health hazards through entry into the food chain (Vasudevan et al., 2003). Copper is another heavy metal with many industrial applications (Konstantinou and Pashalidis, 2008). Although it is an essential element, WHO has established a limit of 2 mg L -1 as the maximum acceptable concentration in drinking water. Aiming at removal of heavy metals, numerous attempts have been made to treat wastewaters by traditional methods such as, chemical precipitation, lime coagulation, ion-exchange, reverse osmosis, membrane separation, adsorption onto active carbon, e.t.c. However, all these methods have shown varying performances, often incomplete metal removal, especially in low concentration pollutant range, high energy requirements, high capital investment and operating costs (Grimm et al., 2008;Vázquez et al., 2009;Chojnacka and Michalak, 2009).

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Study of the interaction between europium (III) and Bacillus subtilis: fixation sites, biosorption modeling and reversibility

Cited by 84 publications

References 25 publications

Bioaccumulation of Pb2+ and its effects on growth, morphology and pigment contents of Spirulina (Arthrospira) platensis

Bioaccumulation of Pb2+ and its effects on growth, morphology and pigment contents of Spirulina (Arthrospira) platensis

Acoustic, electrochemical and microscopic characterization of interaction of Arthrospira platensis biofilm and heavy metal ions

Effect of growth conditions on biosorption of cadmium and copper by yeast cells

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