Modeling kinetics and thermodynamics of Cs+ and Eu3+ removal from waste solutions using modified cellulose acetate membranes

Zaki, Ahmed A.; El-Zakla, T.; Geleel, M. Abed El

doi:10.1016/j.memsci.2011.12.044

Cited by 47 publications

(10 citation statements)

References 41 publications

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“…[27][28][29] PB is promising for its much higher size-recognition of hydrated Cs + ions as compared with others, such as mesoporous silica, bacteria, and phlopite. [30][31][32][33][34][35][36][37][38] Many papers have been written concerning Cs + extraction using PB and PBAs. [39][40][41][42][43][44][45][46][47][48][49][50][51][52] Their ability to electrochemically remove Cs + ions from radioactive waste water has also been investigated using spin-coated films of PBA NPs, Cu 3 [Fe(CN) 6 ] 2 .…”

Section: Introductionmentioning

confidence: 99%

Proton-exchange mechanism of specific Cs+ adsorption via lattice defect sites of Prussian blue filled with coordination and crystallization water molecules

et al. 2013

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We have revealed the fundamental mechanism of specific Cs(+) adsorption into Prussian blue (PB) in order to develop high-performance PB-based Cs(+) adsorbents in the wake of the Fukushima nuclear accident. We compared two types of PB nanoparticles with formulae of Fe(III)4[Fe(II)(CN)6]3·xH2O (x = 10-15) (PB-1) and (NH4)0.70Fe(III)1.10[Fe(II)(CN)6]·1.7H2O (PB-2) with respect to the Cs(+) adsorption ability. The synthesised PB-1, by a common stoichiometric aqueous reaction between 4Fe(3+) and 3[Fe(II)(CN)6](4-), showed much more efficient Cs(+) adsorption ability than did the commercially available PB-2. A high value of the number of waters of crystallization, x, of PB-1 was caused by a lot of defect sites (vacant sites) of [Fe(II)(CN)6](4-) moieties that were filled with coordination and crystallization water molecules. Hydrated Cs(+) ions were preferably adsorbed via the hydrophilic defect sites and accompanied by proton-elimination from the coordination water. The low number of hydrophilic sites of PB-2 was responsible for its insufficient Cs(+) adsorption ability.

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Section: Introductionmentioning

confidence: 99%

Proton-exchange mechanism of specific Cs+ adsorption via lattice defect sites of Prussian blue filled with coordination and crystallization water molecules

et al. 2013

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Section: Resultsmentioning

confidence: 99%

“…Based on the linearized form of the pseudo-second-order kinetic model presented in the previous figures, the activation energy values associated with the Pd(II) adsorption processes on MgSiO 3 -DB18C6 and MgSiO 3 -DB30C10 are calculated (Table 5). The recovery process of Pd(II) is an adsorption process that can be consider a physical-chemical process [36]. The values of the separation factor range between 0 <RS < 1 confirming that the isotherm has a convex shape and the adsorption of Pd(II) on both materials is favorable.…”

Section: Activation Energy and Thermodynamic Parametersmentioning

confidence: 97%

“…Based on the linearized form of the pseudo-second-order kinetic model presented in the previous figures, the activation energy values associated with the Pd(II) adsorption processes on MgSiO3-DB18C6 and MgSiO3-DB30C10 are calculated (Table 5). The recovery process of Pd(II) is an adsorption process that can be consider a physical-chemical process [36]. In order to establish the information regarding the energy changes associated with the adsorption process, thermodynamic studies are performed in the temperature range 298-318 K. Based on the obtained data from the thermodynamic studies, the spontaneous character of the adsorption processes can be specified.…”

Section: Activation Energy and Thermodynamic Parametersmentioning

confidence: 99%

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A New Perspective on Adsorbent Materials Based Impregnated MgSiO3 with Crown Ethers for Palladium Recovery

Ciopec

Grad

Negrea

et al. 2021

IJMS

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The study of new useful, efficient and selective structures for the palladium ions’ recovery has led to the development of a new series of macromolecules. Thus, this study presents a comparative behavior of two crown benzene ethers that modify the magnesium silicate surface used as adsorbent for palladium. These crown ethers are dibenzo18-crown-6 (DB18C6) and dibenzo 30-crown-10 (DB30C10). The obtained materials were characterized by scanning electron microscope (SEM), energy-dispersive X-ray spectroscopy (EDX) and Fourier-transform infrared spectroscopy (FT-IR). The specific surface area (BET) and point of zero charge (PZC) of the two materials were determined. The palladium ions’ recovery from synthetic aqueous solutions studies aimed to establish the adsorption mechanism. For this desideratum, the kinetic, equilibrium and thermodynamic studies show that MgSiO3-DB30C10 have a higher adsorption capacity (35.68 mg g−1) compared to MgSiO3-DB18C6 (21.65 mg g−1). Thermodynamic studies highlight that the adsorption of Pd(II) on the two studied materials are spontaneous and endothermic processes. The positive values of the entropy (ΔS0) suggest that the studied adsorption processes show a higher disorder at the liquid/solid interface. Desorption studies were also performed, and it was found that the degree of desorption was 98.3%.

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“…[22] Cellulose acetate was modified using acrylamide (AAm) and polyethylene glycol (PEG) and applied for removal of Cs(I) and Eu(III) from aqueous waste solutions. [23] In addition, modified cellulose derivatives were also synthesized and applied for removal of inorganic and organic pollutants. [24][25][26][27][28] Dioctyl phthalate (Dop) is known as one of the most extensively used plasticizers in plastics processing.…”

Section: Introductionmentioning

confidence: 99%

A novel cellulose-dioctyl phthate-baker's yeast biosorbent for removal of Co(II), Cu(II), Cd(II), Hg(II) and Pb(II)

Mahmoud

Yakout

Aziz

et al. 2015

Journal of Environmental Science and Health, Part A

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In this work, dioctyl phthalate (Dop) was used as a highly plasticizing material to coat and link the surface of basic cellulose (Cel) with baker's yeast for the formation of a novel modified cellulose biosorbent (Cel-Dop-Yst). Characterization was accomplished by Fourier Transform Infrared Spectroscopy (FT-IR), Thermogravimetric analysis (TGA) and Scanning Electron Microscope (SEM) measurements. The feasibility of using Cel-Dop-Yst biosorbent as an efficient material for removal of Co(II), Cu(II), Cd(II), Hg(II) and Pb(II) ions was explored using the batch equilibrium technique along with various experimental controlling parameters. The optimum pH values for removal of these metal ions were characterized in the range of 5.0-7.0. Cel-Dop-Yst was identified as a highly selective biosorbent for removal of the selected divalent metal ions. The Cel-Dop-Yst biosorbent was successfully implemented in treatment and removal of these divalent metal ions from industrial wastewater, sea water and drinking water samples using a multistage microcolumn technique.

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Modeling kinetics and thermodynamics of Cs+ and Eu3+ removal from waste solutions using modified cellulose acetate membranes

Cited by 47 publications

References 41 publications

Proton-exchange mechanism of specific Cs+ adsorption via lattice defect sites of Prussian blue filled with coordination and crystallization water molecules

Proton-exchange mechanism of specific Cs+ adsorption via lattice defect sites of Prussian blue filled with coordination and crystallization water molecules

A New Perspective on Adsorbent Materials Based Impregnated MgSiO3 with Crown Ethers for Palladium Recovery

A novel cellulose-dioctyl phthate-baker's yeast biosorbent for removal of Co(II), Cu(II), Cd(II), Hg(II) and Pb(II)

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