The separation of uranium ions by natural and modified diatomite from aqueous solution

Sprynskyy, Myroslav; Kovalchuk, Iryna; Buszewski, Bogusław

doi:10.1016/j.jhazmat.2010.05.069

Cited by 172 publications

(55 citation statements)

References 28 publications

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“…The biosorption capacities of the native and amidoxime modified fungal pellets for U(VI) ions were compared with the previous studies [5,[37][38][39][40][41][42] (Table 1). The sorption capacity of the amidoxime modified biosorbent was calculated to be 447.4 mg U(VI) g -1 dry biomass, which is comparable and is higher than many other adsorbents and biosorbents.…”

Section: Evaluation Of Biosorption Isothermsmentioning

confidence: 99%

Amidoxime functionalized Trametes trogii pellets for removal of uranium(VI) from aqueous medium

Bayramoğlu

Arıca

2015

J Radioanal Nucl Chem

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Amidoxime modified Trametes trogii pellets were prepared by sequential reaction of fungal surfaces with glutaraldehyde, diaminomaleonitrile and hydroxylamine. Maximum biosorption capacities of the modified and native pellets were found to be 447.4 and 238.2 mg U(VI) g -1 fungal pellets, respectively. Biosorption equilibriums were established in about 45 min and the correlation regression coefficients show that the adsorption process can be well-defined by Langmuir equation. The biosorption of U(VI) ions was well described by the pseudo-second order kinetic model. The variations in enthalpy and entropy for the biosorbents were also calculated.

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Section: Evaluation Of Biosorption Isothermsmentioning

confidence: 99%

Amidoxime functionalized Trametes trogii pellets for removal of uranium(VI) from aqueous medium

Bayramoğlu

Arıca

2015

J Radioanal Nucl Chem

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“…The removal and addition of cations using aluminosilicates are dependent on ion exchange and adsorption mechanisms. Most recent works on the use of modified diatomaceous aluminosilicate as adsorbents are based on the removal of toxic metals from aqueous solutions at relatively low concentrations which may not always be the case in real situations (Linghu and Cui 2014;Knoerr et al 2013;Zhu et al 2012;Liu et al 2013;Irani et al 2011;Danil de Namor et al 2012;Yusan et al 2012;Sheng et al 2008Sheng et al , 2012Sprynskyy et al 2010;Pookmanee et al 2011). Also natural diatomites are contaminated with impurities, which impact negatively on their removal of heavy ions (Zhu et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Adsorption isotherm studies of Cu (II) and Co (II) in high concentration aqueous solutions on photocatalytically modified diatomaceous ceramic adsorbents

2017

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Photocatalytically modified ceramic adsorbents were synthesized for the removal of high concentration Cu (II) and Co (II) ions from their aqueous solutions. The raw material, diatomaceous aluminosilicate mineral was modified using silver and anatase titanium oxide nanoparticles. Batch adsorption experiment was carried out on the targeted metal ions and the results were analyzed by the Langmuir and Freundlich equation at different concentrations (100-1000 mg/l) and the characteristic parameters for each adsorption isotherm were determined. As-received raw materials do not exhibit any sorption capacity for high concentration Cu 2? and Co 2? adsorbates. However, the adsorption isotherms for modified diatomaceous ceramic adsorbents could be fitted well by the Langmuir model for both Cu 2? and Co 2? with correlation coefficient (R) of up to 0.99953. The highest and lowest monolayer coverage (q max ) were 121.803 and 31.289 mg/g for Cu 2? and Co 2? , respectively. The separation factor (R L ) in the experiment was less than one (\1), indicating that the adsorption of metal ions on the Ag-TiO 2 -modified ceramic adsorbent is favorable. The highest adsorption capacity (K f ) and intensity (n) constants obtained from Freundlich model are 38.832 (Cu 2? on ZEO-T) and 5.801 (Co 2? on STOX-Z).

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“…In contrast, much less efforts have been made to enhance the adsorption of heavy-metal ions on diatomite [25,26], even though the heavy-metal adsorption is associated with extensive demands for the remediation of heavy-metal pollution, noble metal recovery, and metal supporting for catalysis purposes. Surface silylation by using organosilane with metal-affinitive groups has been applied to several types of synthetic silicas to improve their heavy-metal adsorption, particularly in the cases of ordered mesoporous silica, such as MCM41 and SBA15 [27,28].…”

Section: Introductionmentioning

confidence: 99%

Surface silylation of mesoporous/macroporous diatomite (diatomaceous earth) and its function in Cu(II) adsorption: The effects of heating pretreatment

Yuan

Dong

Tan

et al. 2013

Microporous and Mesoporous Materials

130

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The separation of uranium ions by natural and modified diatomite from aqueous solution

Cited by 172 publications

References 28 publications

Amidoxime functionalized Trametes trogii pellets for removal of uranium(VI) from aqueous medium

Amidoxime functionalized Trametes trogii pellets for removal of uranium(VI) from aqueous medium

Adsorption isotherm studies of Cu (II) and Co (II) in high concentration aqueous solutions on photocatalytically modified diatomaceous ceramic adsorbents

Surface silylation of mesoporous/macroporous diatomite (diatomaceous earth) and its function in Cu(II) adsorption: The effects of heating pretreatment

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