Amazon kaolinite functionalized with diethylenetriamine moieties for U(VI) removal: Thermodynamic of cation-basic interactions

Guerra, Denis L.; Leidens, Victor L.; Viana, Rúbia Ribeiro; Airoldi, Cláudio

doi:10.1016/j.jhazmat.2010.04.092

Cited by 33 publications

(13 citation statements)

References 45 publications

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“…When the pH is above 9.0, the adsorption efficiency decreases with the increase of pH value in the solution, which may result from the electrostatic repulsion between the increasingly negative U(VI) species and MN status . In general, the electrostatic force between ions and MNs with varying pH is responsible for different adsorption performance, and a similar mechanism can be found when using other adsorbents for U(VI) removal, such as amazon kaolinite, activated carbon, and so on. − Furthermore, the impact of the ionic strength on adsorption was also investigated. It can be seen from Figure a that ionic strength had little effect on similar adsorption efficiency at the same pH value with varying NaNO 3 concentrations, indicating inner-sphere surface complexation of U(VI) adsorption onto the MNs.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of Porous Magnetic Ni_0.6Fe_2.4O₄ Nanorods for Highly Efficient Adsorption of U(VI)

et al. 2018

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In this study, porous magnetic Ni0.6Fe2.4O4 nanorods (MNs) were successfully synthesized just by calcining the Ni0.6Fe2.4C2O4·2H2O precursor. MNs exhibited porous structure with disorderly nanorods based on the characterizations. Experimental results showed that the removal of U(VI) by MNs can reach equilibrium within 150 min at 293 K with a maximal adsorption capacity of 57.7 mg/g. Besides, the adsorption performance was highly dependent on solution pH values, while ion strength and ion species had little influence. The U(VI) adsorption onto the MNs was fitted better by the pseudo-second-order kinetic model, and the isothermal data can be better described by the Langmuir model, suggesting a monolayer adsorption process. Thermodynamic studies indicated the adsorption process to be spontaneous and endothermic. In addition, this magnetic material can achieve convenient separation using an external magnet. Hence, the MNs can be utilized as an effective candidate to enrich and separate U(VI) from aqueous solutions.

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Section: Resultsmentioning

confidence: 99%

Synthesis of Porous Magnetic Ni_0.6Fe_2.4O₄ Nanorods for Highly Efficient Adsorption of U(VI)

et al. 2018

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“…Commonly used surfactants act as modifying agent that are synthetic surfactants, such as cetyltrimethylammonium bromide (CTMAB) [44], octadecyltrimethylammonium bromide (ODTMA) [30], N- [3-[(trimethoxysilyl)propyl]diethylenetriamine (MPDET) [45]. These surfactants may have non-biodegradable properties due to its synthetic origin, which may cause environmental problems.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of N-methylated diaminotriphenilmethane dye (malachite green) on natural rarasaponin modified kaolin

Suwandi¹,

Indraswati²,

Ismadji

2012

Desalination and Water Treatment

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“…Designed applications to improve environmental quality through heavy metal ions removal have recently emerged. Moreover, the versatility of the kaolin clay support to be chemically modified induces its application to produce new materials available for removing contaminates from water and soils [17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Valorisation and Modification of Saharan Clay for Removal of Cu(II), Ni(II), Co(II) and Cd(II) from Aqueous Solutions

Meroufel¹,

Zenasni²,

George³

2020

Pol. J. Environ. Stud.

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The organosilane-modified Saharan kaolin (KS) was prepared and tested as an adsorbent for Cu(II), Ni(II), Co(II) and Cd(II) removal from aqueous solution in comparison with original Saharan kaolin (K). Characterization of modified clay material and original clay was carried out by different methods (XRD, FTIR, TGA and SEM) in order to establish the link between synthesis, structures and properties. The hydrophilic properties of the clay surface have been modified, but not turned into hydrophobic ones. The graft has indeed a polar amine group and the chain length is too short to present an important hydrophobic character. The adsorption of heavy metal ions onto APTES-modified kaolin showed greater efficiency than original kaolin. The adsorption of metal ions by the original kaolin is dominated by the cation exchange phenomenon with a preferential order of selectivity: Cu(II)>Ni(II)>Co(II)>Cd(II), while adsorption on KS is mainly dominated by attraction of the chelating group of the amine in the same order of selectivity. This new hybrid organic-inorganic material may be a good alternative for separation and preconcentration of heavy metal ions.

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Amazon kaolinite functionalized with diethylenetriamine moieties for U(VI) removal: Thermodynamic of cation-basic interactions

Cited by 33 publications

References 45 publications

Synthesis of Porous Magnetic Ni_0.6Fe_2.4O₄ Nanorods for Highly Efficient Adsorption of U(VI)

Synthesis of Porous Magnetic Ni_0.6Fe_2.4O₄ Nanorods for Highly Efficient Adsorption of U(VI)

Adsorption of N-methylated diaminotriphenilmethane dye (malachite green) on natural rarasaponin modified kaolin

Valorisation and Modification of Saharan Clay for Removal of Cu(II), Ni(II), Co(II) and Cd(II) from Aqueous Solutions

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Amazon kaolinite functionalized with diethylenetriamine moieties for U(VI) removal: Thermodynamic of cation-basic interactions

Cited by 33 publications

References 45 publications

Synthesis of Porous Magnetic Ni0.6Fe2.4O4 Nanorods for Highly Efficient Adsorption of U(VI)

Synthesis of Porous Magnetic Ni0.6Fe2.4O4 Nanorods for Highly Efficient Adsorption of U(VI)

Adsorption of N-methylated diaminotriphenilmethane dye (malachite green) on natural rarasaponin modified kaolin

Valorisation and Modification of Saharan Clay for Removal of Cu(II), Ni(II), Co(II) and Cd(II) from Aqueous Solutions

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Product

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Synthesis of Porous Magnetic Ni_0.6Fe_2.4O₄ Nanorods for Highly Efficient Adsorption of U(VI)

Synthesis of Porous Magnetic Ni_0.6Fe_2.4O₄ Nanorods for Highly Efficient Adsorption of U(VI)