Efficiency of bentonite in removing cesium, strontium, cobalt and uranium ions from aqueous solution: encapsulation with alginate for column application

Abou-Lilah, Riham A.; Rizk, Hoda E.; Elshorbagy, Mostafa A.; Gamal, Ahmed; Ali, Abdallah; Badawy, Nagwa A.

doi:10.1080/03067319.2020.1761348

Cited by 26 publications

(15 citation statements)

References 68 publications

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“…The formed pellets were gently stirred in the CaCl2 solution for 3 h to get hardened, and then they were separated, three folds washed with pure water, and dried at 40±1 0 C for 24h. Identification of synthesized composite was confirmed in the previous work [4].…”

Section: Bentonite-alginate Preparationsupporting

confidence: 75%

“…Bentonite-Ca-alginate composite was synthesized and characterized confirming to the procedure described in a previous work Abou-Lilah et al [4]. Preparation of dissolved bentonite suspension was a first stage.…”

Section: Bentonite-alginate Preparationmentioning

confidence: 86%

“…Removal efficiency of origin and irradiated bentonite-Ca-alginate for Cs + , Sr 2+ , UO2 2+ and Co 2+ at optimum conditions are given in Fig. (4). The findings suggested that irradiated samples untill 100 kGy has a marginal influence on an uptake of four ions.…”

Section: Impact Of Gamma Irradiation On a Sorbent's Removal Efficiencymentioning

confidence: 92%

“…A revolutionary alginate microcapsule enclosing bentonite was developed for removing these ions from multicomponent solution to resolve the aggregation for bentonite clay flacks in column. [4]. Therefore, Wastewater care should be established to block these contaminants risk on an environment and public health.…”

Section: Introductionmentioning

confidence: 99%

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Modeling of the dynamics adsorption of some hazardous elements from aqueous solution onto bentonite-calcium-alginate beads

Abou-Lilah¹,

Badway

Gamal

et al. 2021

Al-Azhar Bulletin of Science

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Encapsulation of bentonite-Ca-alginate was employed for discharge of Cs + , Sr 2+ , UO2 2+ and Co 2+ from aquatic solution. Preferable pH for elimination of these ions was 5.5. For radiation stability, bentonite-Ca-alginate was investigated; a 60 Co source was used to expose it to gamma radiation. Data obtained from (FT-IR) assessed radiation-induced effect on a stability of bentonite-Ca-alginate. Irradiated samples untill 100 kGy do not impair an absorption of an ions examined. In a column application, bentonite-Ca-alginate composite beads were examined for the discharge of these ions from multicomponent solution using fixed-bed column. Effect on column output of various parameters, like bed height, flow rate and initial inlet concentration were investigated. The column performance was 49, 46, 47 and 46.6% for Cs + , Sr 2+ , UO2 2+ and Co 2+ , respectively at flow rate of 0.5mL/min, 3cm bed depth and initial metal concentration, 50mg/L for each element. Thomas and Yoon-Nelson models identified a breakthrough curves, which successfully predict breakthrough adsorption curves.

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Section: Bentonite-alginate Preparationsupporting

confidence: 75%

Section: Bentonite-alginate Preparationmentioning

confidence: 86%

Section: Impact Of Gamma Irradiation On a Sorbent's Removal Efficiencymentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Modeling of the dynamics adsorption of some hazardous elements from aqueous solution onto bentonite-calcium-alginate beads

Abou-Lilah¹,

Badway

Gamal

et al. 2021

Al-Azhar Bulletin of Science

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“…Three mL of isopropyl alcohol and 25 mL of cyclohexane were then added to the flask under precipitation [2], electrocoagulation [3], reduction-assisted processes [4,5], solvent extraction [6,7], impregnated resins [8], depending on the levels of concentrations and the complexity of the effluent. Sorption properties have retained great attention more specifically for the treatment of dilute solutions using mineral surfaces [9][10][11], silica [12], functionalized silica [13], biopolymer-silica composite [14], and metal-organic framework [15,16]. Sorption processes using ion-exchange [17][18][19][20][21][22][23][24][25] and chelating resins [26][27][28] have been also widely investigated for the treatment of uranium-bearing solutions.…”

Section: Synthesis Of Magnetic Chitosan/gma Compositementioning

confidence: 99%

Effect of agitation mode (mechanical, ultrasound and microwave) on uranium sorption using amine- and dithizone-functionalized magnetic chitosan hybrid materials

Elwakeel

Hamza

Guibal

2021

Chemical Engineering Journal

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Magnetic chitosan nanoparticles, activated by glycidyl methacrylate, can be functionalized by grafting dieth-ylenetriamine (DETA) and dithizone for improving U(VI) sorption at pH around 5. The physicochemical prop-erties of the materials have been characterized by a wide variety of analytical techniques. Uranyl sorption increases with the pH (progressive deprotonation of amine and sulfur groups). Uptake kinetics are controlled by the agitation mode: the equilibrium time is reduced while using ultrasonic treatment (especially at highest frequency: 80 kHz): the cavitation effect improves the accessibility to internal reactive groups (sorption capacity is increased). The diffusivity coefficient is increased by 4-5 times. In the case of microwave, the sorption capacity is significantly reduced (especially for R-Dithizone, down to 0.8 mmol U g − 1 ) because of temperature increase, which limits the sorption (exothermic mechanism). Mass transfer is tremendously enhanced: equilibrium time is less than 60 s (30 min for ultrasonic treatment and 120 min with mechanical agitation). Sorption capacity at monolayer saturation (Langmuir) decreases with increasing the temperature from 2.20 to 1.74 mmol U g − 1 for R-Amine (from 1.77 to 1.22 mmol U g − 1 for R-Dithizone). The sorption enthalpy is close to − 19.7 kJ mol − 1 for R-Amine (with positive entropy change, ΔS • ) and − 34.2 kJ mol − 1 for R-Dithizone (negative ΔS • ). Metal desorption is highly efficient using 0.3 M Na 2 CO 3 /0.1 M H 2 O 2 solution. Metal desorption is instantaneous (less than 1 min) and complete when using microwave treatment. The ultrasonic treatment allows improving desorption efficiency and decreasing the concentration of the eluent compared with mechanical agitation. The process is successfully applied for uranyl separation from the leachates of marine sediments, especially in the presence of Complexon III (masking agent).

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The effect of humic acid and competing cations Na+ and Ca2+ on the sorption of uranium and europium, onto bentonite from Kimolos Island (Greece)

Noli

Papalanis

Tsamos

et al. 2021

J Radioanal Nucl Chem

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Efficiency of bentonite in removing cesium, strontium, cobalt and uranium ions from aqueous solution: encapsulation with alginate for column application

Cited by 26 publications

References 68 publications

Modeling of the dynamics adsorption of some hazardous elements from aqueous solution onto bentonite-calcium-alginate beads

Modeling of the dynamics adsorption of some hazardous elements from aqueous solution onto bentonite-calcium-alginate beads

Effect of agitation mode (mechanical, ultrasound and microwave) on uranium sorption using amine- and dithizone-functionalized magnetic chitosan hybrid materials

The effect of humic acid and competing cations Na+ and Ca2+ on the sorption of uranium and europium, onto bentonite from Kimolos Island (Greece)

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