Removal of uranium (VI) ion from aqueous solution using kaolinite

Issa, Ragiab A.M.; El Amari, Ayoub O.; AlHanash, Hana B.; Etmimi, Husein M.

doi:10.1016/j.kjs.2023.03.010

Cited by 1 publication

(5 citation statements)

References 21 publications

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“…This was in agreement with that reported for the adsorption of 152 Eu on some kinds of minerals including diatomite [14]. This result is also in agreement with the adsorption of uranyl ions on kaolinite [10]. A similar behaviour was found for uranyl adsorption on fibrous cerium phosphate [9].…”

Section: Effect Of Initial Ion Concentrationsupporting

confidence: 92%

“…This claim describes the monolayer adsorption behaviour 𝑈𝑂 2 2+ on diatomite (Figure 10). The maximum adsorption capacity of uranyl on diatomite was greater than that for uranyl ions adsorbed on kaolinite as reported earlier [10]. The maximum distribution coefficient of 𝑈𝑂 2 2+ ions on diatomite was 3.3 at initial uranyl ion concentration of 50 mg/L (Figure 8).…”

Section: Adsorption Modellingsupporting

confidence: 78%

“…This means that, the metal ions can occupy more sites on the surface of the adsorbent at lower solid/liquid ratios. This behaviour is expected, and has been observed for the adsorption of uranyl ions on kaolinite [10]; uranyl ions on fibrous cerium phosphate [9] and uranyl ions on Mesoporous Carbon Impregnated with Tri octylamine [20]. The adsorption capacity (q) decreases from 54 to mg/g with increasing adsorbent amount as shown in Figure 9.…”

Section: Fig 7: Effect Of Uranyl Ion Concentration On the Adsorption ...supporting

confidence: 72%

“…An adsorption isotherm, which is a useful curve, often describes the mechanisms governing the retention (or release) or mobility of a chemical from aqueous porous media or aquatic habitats to a solid phase at a constant temperature and pH value [10]. The executed batch experiments yielded equilibrium isotherms for 𝑈𝑂 2 2+ ions.…”

Section: Adsorption Modellingmentioning

confidence: 99%

“…Consequently, public anxiety over the safe disposal of nuclear waste exists [4]. Many methods, such as chemical precipitation [5], ion exchange [6], membrane separation [7], extraction [8] and adsorption [9,10], have been investigated for extracting and preconcentrating radionuclides from contaminated wastewater [4]. Compared to other methods, adsorption technology is repeatedly used to remove radionuclides from aqueous solutions because of its high efficacy, low cost and ease of use.…”

Section: Introductionmentioning

confidence: 99%

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Study on Natural Diatomite as an Adsorbent for Uranyl (VI) ions, Using Spectrophotometric Method

Issa,

Hana B. AlHanash,

Mona M. Abdulsalam

et al. 2024

JOPAS

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This work is based on the investigation of uranyl (VI) ion adsorption onto natural diatomite using batch sorption method under different parameters such as pH, initial ion concentration, adsorbent amount and effect of sulfate ion as a foreign ion. 8-hydroxyquinoline is used as a chromogen forming a pale-yellow complex with ions in chloroform, the absorbance was measured spectrophotometrically at λmax 460 nm, obtaining a linear calibration curve with R2=0.998, LOD=3.03 mg/L and LOQ=9.21 mg/L. Prior to the implementation of the batch experiment, the morphology and composition of diatomite was confirmed using XRF (Bruker S8 Tiger), XRD (Bruker D5005), FTIR (Bruker Vector 22), and SEM (JEOL JSM-5610 LV) techniques. From spectrophotometric analysis, the results showed that the maximum uranyl ion adsorption distribution coefficient reached at the initial concentration of 50ppm, pH 4.5, contact time 5hrs and adsorption dosage of 2 g/L. There was no significant effect of sulfate ion on the adsorption affinity. Adsorption isotherm was studied by Langmuir which was favourable model fitting with R2=0.996 and maximum adsorption capacity of 16mg/g, and separation factor RL = 0.0122. Freundlich isotherm model also applied for the same data and give a very straight line with R2= 1.00 and maximum adsorption capacity of 200 mg/g. Temkin model was less fit and gave a negative isotherm curve with R2= 0.78, KT= 0.9405 L/g, bT= 24.724 J/mol. Langmuir and Freundlich isotherms gave exothermic adsorption while Temkin gave an endothermic one.

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Section: Effect Of Initial Ion Concentrationsupporting

confidence: 92%

Section: Adsorption Modellingsupporting

confidence: 78%