Removal of uranium(VI) from aqueous solutions and nuclear industry effluents using humic acid-immobilized zirconium-pillared clay

Anirudhan, T.S.; Bringle, C. D.; Rijith, S.

doi:10.5004/dwt.2009.939

Cited by 105 publications

(21 citation statements)

References 32 publications

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“…But when pH values higher than 6.0, the decrease sorption of U(VI) may result from the formation of dissolved hydroxide and carbonate complex [19]. The pHdependence of the sorption of U(VI) on magnetic illite is similar to that on MOCZ, CTR, HA-immobilized zirconiumpillared clay and amorphous iron hydroxide reported by previous works [22][23][24][25].…”

Section: Effects Of Ph and Ionic Strengthsupporting

confidence: 65%

Sorption of U(VI) on magnetic illite: effects of pH, ions, humic substances and temperature

Yin

et al. 2015

J Radioanal Nucl Chem

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The sorption of U(VI) on magnetic illite as a function of pH, ionic strength, solid-to-liquid ratio, shaking time, humic acid (HA) and temperature was investigated through batch experiments. The results showed that the sorption process had a strong dependent on the changes of pH, temperature and HA in solution. And at below pH 6.5, with decreasing of the valences of anions such as Cl -, SO 2À 4 and PO 3À 4 ; the sorption amount increased obviously, but that was almost not influenced by cations. This experiment could provide some data base for the studies of actinide elements migration in geological media.

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Section: Effects Of Ph and Ionic Strengthsupporting

confidence: 65%

Sorption of U(VI) on magnetic illite: effects of pH, ions, humic substances and temperature

Yin

et al. 2015

J Radioanal Nucl Chem

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“…In recent years, numerous studies have been conducted to remove uranyl ions from aqueous solutions using various adsorbents, such as zeolites [11,12], clays [13], biological adsorbents [14,15], chemically modified adsorbents [16][17][18][19], and polymeric adsorbents [20][21][22][23][24]. However, these adsorbents suffer from one or more drawbacks.…”

Section: Introductionmentioning

confidence: 99%

“…Various methods have been proposed to remove uranyl ions from wastewater, such as chemical precipitation [5], solvent extraction [6,7], ion exchange [8,9] and adsorption [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24]. Adsorption is a desirable method due to its high efficiency, economical, ecofriendly operation.…”

Section: Introductionmentioning

confidence: 99%

Study on adsorption characteristics of uranyl ions from aqueous solutions using zirconium hydroxide

Liu

Wang

Jiang

et al. 2015

J Radioanal Nucl Chem

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The removal of uranyl ions from aqueous solutions using Zr(OH) 4 Á3.35H 2 O (ZH) as adsorbent was investigated using a batch adsorption technique. The maximum removal rate was found as 451.7 mg UO 2 2? Ág -1 ZH. The adsorption capacity and adsorption rate of the calcinated products gradually decreases with increasing calcination temperature. The hydroxyl groups in the zirconium hydroxide play an important role for the adsorption uranyl ions, which agree well with the thermogravimetric analysis of zirconium hydroxide for completely dehydration at 700°C. The observed data shows that the adsorption process is dependent on surface complexation mechanism.

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“…Among the methods that have been proposed for the extraction and recovery of these elements, solid phase extraction with the use of an adsorbent has advantages because of its ability to address low metal and pollutant concentrations, e.g. radioactive waste [3].…”

Section: Introductionmentioning

confidence: 99%

Solid Phase Extraction of Thorium and Uranium and their Separation from Lanthanides using Humic Acid Silica Gel as a Low-Cost Adsorbent

Prasetyo

Toyoda

2017

J. Eng. Technol. Sci.

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Abstract. Solid phase extraction and separation of thorium (Th), uranium (U) and lanthanides were achieved using a humic acid-modified silica gel (Si-HA). Adsorption capacity, effect of contact time, pH, and adsorbent dose were examined at room temperature. The maximum adsorbent capacities (pH = 3) for Th and U were 28.0 and 31.3 mg g -1 , respectively. The isotherm parameters denoted that the adsorption was favorable and optimum conditions were attained within 90 min. The kinetic data conformed well to pseudo-second order and intra-particle diffusion models. The distribution coefficients of U, Th and lanthanides in EDTA, citric acid and nitric acid media signify the possible separation of each element from the others. The salinity did not significantly affect the ability of Si-HA to extract Th and U. The adsorbent stability and reusability were also assessed through four-adsorption-desorption cycles. The simplicity of the proposed separation method along with the stability of the adsorbent and high regeneration efficiency under acidic conditions demonstrated the merit of using Si-HA as a low-cost adsorbent.

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Removal of uranium(VI) from aqueous solutions and nuclear industry effluents using humic acid-immobilized zirconium-pillared clay

Cited by 105 publications

References 32 publications

Sorption of U(VI) on magnetic illite: effects of pH, ions, humic substances and temperature

Sorption of U(VI) on magnetic illite: effects of pH, ions, humic substances and temperature

Study on adsorption characteristics of uranyl ions from aqueous solutions using zirconium hydroxide

Solid Phase Extraction of Thorium and Uranium and their Separation from Lanthanides using Humic Acid Silica Gel as a Low-Cost Adsorbent

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