Biosorption, Metals

Volesky, B.; Schiewer, S.

doi:10.1002/0471250589.ebt036

Cited by 78 publications

(90 citation statements)

References 93 publications

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“…present in the biomass, producing more free sites for metal biosorption [8,22]. Furthermore, with increasing the pH level, metal ions gradually become hydrolyzed with a lesser degree of hydration and therefore, less energy is necessary for the removal or reorientation of the hydrated water molecules upon binding, thus facilitating metal sorption [36].…”

Section: Resultsmentioning

confidence: 99%

Lanthanum biosorption by a Pseudomonas sp.: equilibrium studies and chemical characterization

Kazy

Das

Sar

2006

J IND MICROBIOL BIOTECHNOL

133

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Lanthanum biosorption by a Pseudomonas sp. was characterized in terms of equilibrium metal loading, model fitting, kinetics, effect of solution pH, lanthanum-bacteria interaction mechanism and recovery of sorbed metal. Lanthanum sorption by the bacterium was rapid and optimum at pH 5.0 with equilibrium metal loading as high as 950 mg g(-1) biomass dry wt. Scatchard model and potentiometric titration suggested the presence of at least two types of metal-binding sites, corresponding to a strong and a weak binding affinity. The chemical nature of metal-microbe interaction has been elucidated employing FTIR spectroscopy, energy dispersive X-ray analysis (EDX) and X-ray diffraction analysis (XRD). FTIR spectroscopy and XRD analysis revealed strong involvement of cellular carboxyl and phosphate groups in lanthanum binding by the bacterial biomass. EDX and the elemental analysis of the sorption solution ascertained the binding of lanthanum with the bacterial biomass via displacement of cellular potassium and calcium. Transmission electron microscopy exhibited La accumulation throughout the bacterial cell with some granular deposits in cell periphery and in cytoplasm. XRD confirmed the presence of LaPO4 crystals onto the bacterial biomass after La accumulation for a long period. A combined ion-exchange-complexation-microprecipitation mechanism could be involved in lanthanum accumulation by the biomass. Almost 98% of biomass-bound La could be recovered using CaCO3 as the desorbing agent.

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Section: Resultsmentioning

confidence: 99%

Lanthanum biosorption by a Pseudomonas sp.: equilibrium studies and chemical characterization

Kazy

Das

Sar

2006

J IND MICROBIOL BIOTECHNOL

133

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“…On the other hand, as the pH value of the solution increases, adsorption also increases due to lesser number of H + and greater number of surface ligands with negative charges. The low adsorption of metal ions at low pH may be due to sorbate lyophobic behavior 17 . In the same way, the solubility of metal in solution decreases with increasing pH and the sorption increases with increasing of pH.…”

Section: Effect Of Phmentioning

confidence: 99%

Development of Natural Cation Exchanger for the Treatment of Lead ions from Aqueous Solution

Homagai

2013

J. Nepal Chem. Soc.

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“…For the duration of the sorption experiments up to the column exhaustion (in terms of nickel concentration), the exit concentrations of lead and copper were always below 100 lg L -1 . The presence of anions can lead to the following: (a) Formation of complexes that have higher affinity to the sorbent than the free metal ions, i. e., an enhancement of sorption, and (b) Formation of complexes that have a lower affinity to the sorbent than free metal ions, i. e., a reduction of sorption [28]. However, in most cases of biosorption, the metal binding tends to be reduced in the presence of anions [24,29].…”

Section: Biosorption Of Nickel From Electroplating Effluentsmentioning

confidence: 99%

Biosorption of Nickel from Synthetic and Electroplating Industrial Solutions using a Green Marine Algae Ulva reticulata

Vijayaraghavan¹

2008

CLEAN Soil Air Water

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The present work investigated the biosorption of nickel from synthetic and electroplating industrial effluents using a green marine algae Ulva reticulata. Preliminary batch results imply that pH 4.5 was optimum for nickel uptake and the isotherm experiments conducted at this pH condition indicated that U. reticulata can biosorb 62.3 mg g -1 nickel ions from synthetic solutions, according to the Langmuir model. Desorption was effective and practical using 0.1 M CaCl 2 (pH 2.5, HCl) and the biomass was regenerated and reused for three cycles. Continuous biosorption experiments were performed in an upflow packed column (2 cm I.D and 35 cm height). Among the two electroplating effluents used, effluent-1 is characterized by excess co-ions and high nickel ion content. This influenced the column nickel uptake with U. reticulata exhibiting 52.1 mg g -1 in the case of effluent-1 compared to 56.5 mg g -1 in the case of synthetic solution. On the other hand U. reticulata performed well in effluent-2 with uptakes of 53.3 and 54.3 mg g -1 for effluent-2 and synthetic solution, respectively. Mathematical modeling of column experimental data was performed using nonlinear forms of the Thomas-and modified dose-response models, with the latter able to simulate breakthrough curves with high correlation coefficients.

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Biosorption, Metals

Cited by 78 publications

References 93 publications

Lanthanum biosorption by a Pseudomonas sp.: equilibrium studies and chemical characterization

Lanthanum biosorption by a Pseudomonas sp.: equilibrium studies and chemical characterization

Development of Natural Cation Exchanger for the Treatment of Lead ions from Aqueous Solution

Biosorption of Nickel from Synthetic and Electroplating Industrial Solutions using a Green Marine Algae Ulva reticulata

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