Biosorption of Strontium Ions by Magnetically Modified Yeast Cells

Ji, Yanqin; Hu, Yan-Tao; Tian, Qinghua; Shao, Xianzhang; Li, Jinying; Šafařı́ková, Mirka; Šafařı́k, Ivo

doi:10.1080/01496391003705664

Cited by 46 publications

(9 citation statements)

References 21 publications

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“…This suggests that H + ions liberated from the solid surface into the aqueous phase as a result of the exchange with Sr 2+ cations. Similar trends were also observed for Sr 2+ removal by gels-based polysaccharide derivatives and magnetically modified fodder yeast (Kluyveromyces fragilis) cells [24,25] and Coir pith [26]. In the following studies, experiments were done at pH 6.0 to avoid any possible hydroxide precipitation.…”

Section: Effect Of Phsupporting

confidence: 60%

Biosorption behavior of Sr²⁺using straw-derived biochar: equilibrium and isotherm study

Yakout

Elsherif

2015

Desalination and Water Treatment

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A B S T R A C TRice straw-derived biochars carbonize at different temperature (550, 650, 750˚C) used for Sr 2+ removal. Experimental parameters affecting the sorption process like pH, contact time, sorbent concentration, and temperature were investigated. Sorption profile showed an initial rapid uptake which decreased and became almost constant after one hour. Optimum Sr 2+ sorption was achieved at pH 6. Sorption kinetics good correlated with both pseudo-secondorder and Elovich kinetic equations. Isotherm model of Dubinin-Radushkevich provides the best correlation of Sr 2+ sorption. The present biochar shows better sorption performance (198 mg/g) of Sr 2+ than many types of sorbents. Adsorption of Sr 2+ on biochar was endothermic and increase upon solution temperature rises from 25 to 55˚C. Present investigation emphasized that the rice straw-based biochar exhibited a high potential for Sr 2+ removal from aqueous solution.

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Section: Effect Of Phsupporting

confidence: 60%

Biosorption behavior of Sr²⁺using straw-derived biochar: equilibrium and isotherm study

Yakout

Elsherif

2015

Desalination and Water Treatment

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“…The drop in equilibrium pH suggests that H þ ions are liberated from the solid surface into the aqueous phase as a result of the exchange with metal cations. Similar trends were also observed for Sr(II) removal by gels based on polysaccharide derivatives and magnetically modified fodder yeast (Kluyveromyces fragilis) cells (Wang et al, 2009;Ji, 2010) and coir pith (Parab et al, 2013).…”

Section: Effect Of Ph On Sr(ii) Sorptionsupporting

confidence: 63%

Investigation of Strontium (II) Sorption Kinetic and Thermodynamic onto Straw-derived Biochar

Yakout

Elsherif

2015

Particulate Science and Technology

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Biochars have attracted much research attention recently because of their potential applications in many environmental areas. In this study, rice straw-derived biochars produced at different pyrolysis temperatures (550-750 C) were used as adsorbents for the removal of strontium (II) under different experimental conditions of time, pH, and temperature. Sr(II) sorption equilibrium occurs after 30 min and its sorption maximum achieved at pH 6. The kinetic data obtained were analyzed to predict the constant rate of sorption using three common kinetic models: pseudo-first-order, pseudo-second-order equation, and intraparticle diffusion equation. The pseudo-second-order model was suitable for describing the sorption kinetics for the removal of Sr(II) from aqueous solution onto straw-derived biochar. Sorption of Sr(II) onto biochar was endothermic. Biochar has the highest Sr(II) sorption capacity in comparison to other adsorbents.

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“…The sorption isotherms characterize both the sorbent and the sorbate and can be utilized, for instance, for preparation of material balances. In the literature, the results of sorption experiments on biosorbents are usually described by equations of Langmuir isotherms (25)(26)(27)(28)(29)(30)(31)(32)(33)(34)(35)(36)(37). The maximum sorption capacity, q max , determined from those equations is considered as being one of principal criterions of suitability of a particular biosorbent for removal of metals by biosorption (38).…”

Section: Introductionmentioning

confidence: 99%

Removal of Cadmium(II) from Aqueous Solutions by Calcium Alginate Beads

Kwiatkowska-Marks

Wójcik

2014

Separation Science and Technology

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Sorption of Cd(II) ions from dilute aqueous solutions by alginate beads has been studied. The measurements were run at 25 • C at a fixed pH of 5.0. Equilibrium sorption isotherms have been determined over a wide cadmium concentration range of 0.3-3 mmol/dm 3 . The Langmuir equation has been found to adequately describe experimental results, and the equilibrium constants depended on the alginate content in the beads. The values of the maximum sorption capacity of Cd(II) ions have been found to decrease with increasing alginate content in the beads. Effective diffusivity (D e ) of the cadmium compounds was also calculated in the beads. The study was carried out using two methods: a shrinking core model (SCM) method and a newly developed method named conductometric. The conductometric method turned out to be a simple and effective one for calculation of effective diffusivity of Cd(II) in alginate sorbents. The D e values obtained by the two methods depended on the alginate content in the beads. However, the SCM method, in contrast to the conductometric one, gave the D e values increasing with increasing alginate level in the beads and higher than the molecular diffusivity of Cd(II), this being inconsistent with the mechanism of diffusion in porous carriers. For this reason, the conductometric method can be considered as one giving more reliable results than the SCM method. Moreover, the retardation coefficients of the diffusion in the alginate beads were calculated. Enhanced content of the biopolymer in the beads caused retardation of Cd(II) diffusion in the beads owing to decreasing of calculated retardation coefficients with increasing alginate contents in the beads.

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Biosorption of Strontium Ions by Magnetically Modified Yeast Cells

Cited by 46 publications

References 21 publications

Biosorption behavior of Sr²⁺using straw-derived biochar: equilibrium and isotherm study

Biosorption behavior of Sr²⁺using straw-derived biochar: equilibrium and isotherm study

Investigation of Strontium (II) Sorption Kinetic and Thermodynamic onto Straw-derived Biochar

Removal of Cadmium(II) from Aqueous Solutions by Calcium Alginate Beads

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Biosorption of Strontium Ions by Magnetically Modified Yeast Cells

Cited by 46 publications

References 21 publications

Biosorption behavior of Sr2+using straw-derived biochar: equilibrium and isotherm study

Biosorption behavior of Sr2+using straw-derived biochar: equilibrium and isotherm study

Investigation of Strontium (II) Sorption Kinetic and Thermodynamic onto Straw-derived Biochar

Removal of Cadmium(II) from Aqueous Solutions by Calcium Alginate Beads

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Biosorption behavior of Sr²⁺using straw-derived biochar: equilibrium and isotherm study

Biosorption behavior of Sr²⁺using straw-derived biochar: equilibrium and isotherm study