Synthesis and application of an analogue of mesolite for the removal of uranium(VI), thorium(IV), and europium(III) from aqueous waste

Sharma, Pankaj; Tomar, Radha

doi:10.1016/j.micromeso.2008.05.036

Cited by 95 publications

(46 citation statements)

References 68 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…None of the 11 different adsorbents presented higher adsorption capacities than natural and modified clays for Th(IV) uptake, indicating that these adsorbents could be successfully employed for removal of this metallic specie from aqueous solution. 5,8,[27][28][29][30][31][32][33] As observed, the present series of results obtained from natural and modified Amazon clays present the same order of magnitude as those obtained with the magnetite, 28 ferridrite 28 and perlite. 29 From calorimetric titration data, the net thermal effects resulted in corresponding well-behaved isotherms that were fitted to the Sips model, as shown in Figures 6a and 6b.…”

Section: Adsorption and Thermodynamic Studiessupporting

confidence: 80%

“…5,8 The concentration of thorium in the supernatant was determined with a Systronic-17 UV-Vis spectrophotometer, by measuring absorbance at a λ max of 660 nm by using a Th-arsenazoIII complex. Firstly, the effect of pH on adsorption for all clay samples was adjusted by addition of 0.10 mol dm -3 of nitric acid or 0.10 mol dm -3 of sodium hydroxide.…”

Section: Adsorption Experimentsmentioning

confidence: 99%

“…For this last procedure, the development of low cost adsorbents with easy manipulation and regeneration for possible reuse has been an object of significant attention, mainly when effluents are involved. 4,5 Various conventional and non-conventional adsorbents have been explored for removal of different metal ions from aqueous solutions. 6,7 The presence of heavy metals in the environment is of serious concern as the number of ecological and health problems associated with them is very high.…”

Section: Introductionmentioning

confidence: 99%

“…Uranyl has been shown to be strongly adsorbed onto many soil constituents including clay minerals and metal oxides under appropriate chemical conditions, and therefore such materials can be used for U(VI) and Th(IV) remediation of aqueous solutons. [4][5][6][7][8][9] Research concerning the application of the minerals to the removal of radionuclides from different aqueous Vol. 20, No.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Adsorption of thorium(IV) on chemically modified Amazon clays

Guerra¹,

Viana²,

Airoldi³

2009

J. Braz. Chem. Soc.

View full text Add to dashboard Cite

Amostras de caulinita e esmectita oriundas da região Amazônica, Brasil, foram modificadas com 2-mercaptobenzimidazol (MBI) usando rotas homogênea e heterogênea. As amostras de argilas modificadas (K HOM, S HOM , K HET e S HET ) foram caracterizadas por análise textural, MEV e espectroscopia 13 C NMR. As argilas modificadas quimicamente apresentaram modificações em suas propriedades físico-químicas incluindo: área específica 48,0 (S) para 869,8 m 2 g -1 (S HET ). A habilidade destes materiais para remover tório(IV) em soluções aquosas foi investigada por um série de isotermas de adsorção ajustadas pela equação de Sips em temperatura ambiente e pH 2,0. O número máximo de mols adsorvidos foi determinado em 8,29,8,86,9,57 e 9,89 10 -1 mmol g -1 para K HOM , K HET , S HOM e S HET , respectivamente. Os efeitos energéticos causados pela adsorção do cation tório(IV) foram determinados através de metodologia calorimétrica.Kaolinite and smectite clay samples from the Amazon region, Brazil, were modified with 2-mercaptobenzimidazole (MBI) using homogeneous and heterogeneous routes. The modified clay samples (K HOM , S HOM , K HET and S HET ) were characterized by textural analysis, SEM and 13 C NMR spectroscopy. The chemically modified clay samples showed modifications of their physicalchemical properties including: specific area 48.0 (S) to 869.8 m 2 g -1 (S HET ). The ability of these materials to remove thorium(IV) from aqueous solution was followed by a series of adsorption isotherms adjusted to a Sips equation at room temperature, and pH 2.0. The maximum number of moles adsorbed was determined to be 8. 29, 8.86, 9.57 and 9.89 10 -1 mmol g -1 for K HOM , K HET , S HOM and S HET , respectively. The energetic effects (∆ int H, ∆ int G and ∆ int S) caused by thorium(IV) cation adsorption were determined through calorimetry.

show abstract

Section: Adsorption and Thermodynamic Studiessupporting

confidence: 80%

Section: Adsorption Experimentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Adsorption of thorium(IV) on chemically modified Amazon clays

Guerra¹,

Viana²,

Airoldi³

2009

J. Braz. Chem. Soc.

View full text Add to dashboard Cite

show abstract

“…The toxic nature of heavy metals has caused serious health problems for human, and they can accumulate in the environment (Rahmani et al 2010). In addition, recovery and removal of heavy metals are principal purposes in industry and saving clean water resources (Sharma and Tamar 2008;Neghlani et al 2011). Solvent extraction (Resterna et al 2010), chemical precipitation (Soylak and Erdogan 2006;Uluozlu et al 2010), reverse osmosis and membrane separation (Kornilovich et al 2000), ion exchange (Shoushtari et al 2006), electrofloatation (Aydin and Soylak 2010), coagulation (Goncharuk et al 2001) and adsorption process (Zhou et al 2009) are some of the common techniques for the removal of heavy metal ions from aqueous solution.…”

Section: Introductionmentioning

confidence: 99%

A novel method for synthesis of nano-γ-Al2O3: study of adsorption behavior of chromium, nickel, cadmium and lead ions

Poursani

Nilchi²,

Hassani

et al. 2015

Int. J. Environ. Sci. Technol.

View full text Add to dashboard Cite

Nano-c-Al 2 O 3 adsorbent was synthesized by the novel sol-gel method. The adsorbent was characterized by transmission electron microscope, Fourier transform infrared and X-ray powder diffraction. The effects of several variables such as, adsorbent weight, pH and contact time on adsorption of chromium (Cr 6? ), nickel (Ni 2? ), cadmium (Cd 2? ) and lead (Pb 2? ) ions were studied in batch experiments. The results showed that the synthesized nano-c-Al 2 O 3 had a good capacity to adsorb Cr and Pb. The kinetic data were described with pseudo-first-and pseudo-second-order models. Three isotherm models, namely Freundlich, Langmuir and Tempkin, were used for analysis of equilibrium data, and results showed that Langmuir and Freundlich models were suitable for describing the equilibrium data of Cr

show abstract

Cooperative Capture of Uranyl Ions by a Carbonyl‐Bearing Hierarchical‐Porous Cu–Organic Framework

et al. 2019

View full text Add to dashboard Cite

To efficiently capture the toxic uranyl ions (UO 2 2+ ), an ew hierarchical micro-macroporous metal-organic framework was prepared under template-free conditions,f eaturing interconnected multi-nanocages bearing carbonyl groups derived from as emi-rigid ligand. The material exhibits an unusually high UO 2 2+ sorption capacity of 562 mg g À1 ,w hich occurs in an intriguing two-steps process,o nt he macroporebased crystal surface and in the inner nanocages.N otably,t he latter is attributed to the cooperative interplay of the shrinkage of the host porous framework induced by uranyl accommodation and the free carbonyl coordination sites,a ss hown by both single-crystal X-rayd iffraction and ar ed-shift of the infrared [O = U VI = O] 2+ antisymmetric vibration band.

show abstract

Synthesis and application of an analogue of mesolite for the removal of uranium(VI), thorium(IV), and europium(III) from aqueous waste

Cited by 95 publications

References 68 publications

Adsorption of thorium(IV) on chemically modified Amazon clays

Adsorption of thorium(IV) on chemically modified Amazon clays

A novel method for synthesis of nano-γ-Al2O3: study of adsorption behavior of chromium, nickel, cadmium and lead ions

Cooperative Capture of Uranyl Ions by a Carbonyl‐Bearing Hierarchical‐Porous Cu–Organic Framework

Contact Info

Product

Resources

About