Adsorption of Uranium from Aqueous Solutions Using Activated Carbon

Abbasi, W. A.; Streat, M.

doi:10.1080/01496399408005627

Cited by 106 publications

(48 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…First is a strong decrease during the first five hours and second is a slow reduction observed in a metal concentration for the next 67 hours. It can be explained by diffusion and transport processes within macropores and subsequently by slow transport within meso-and micropores (Peel andBenedek 1980, Abbasi andStreat 1994). Van Lier (1983) describes three steps of adsorption kinetics, which explains attaining equilibrium.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Adsorption of copper, cadmium and silver from aqueous solutions onto natural carbonaceous materials

Hanzlik¹,

Jehlička²,

Weishauptová³

et al. 2004

PLANT SOIL ENVIRON

View full text Add to dashboard Cite

Twelve carbonaceous materials were investigated for adsorption of Cd, Cu and Ag from water solutions. Before the adsorption experiments the chemical and structural characterization of all materials were made. The batch adsorption experiment was used. The kinetic of the adsorption process was very fast for the first five hours but very slow for approximately the next 65 hours. Nevertheless the maximum amount of metal removed was achieved during the first stage of about five hours. Biological materials (milled wood, bark, cork) exhibited a very low affinity for adsorption of metals. The best results were obtained for materials in an intermediate degree of carbonisation with a high content of oxygen rich functional groups. Although the highly carbonised materials exhibited low ability to adsorb copper or cadmium, their capacity to bind silver was very high.Keywords: adsorption; copper; cadmium; silver; wood; peat; coal; activated carbon Supported by the Ministry of Education, Youth and Sports of the Czech Republic, Project FRVŠ 1718. 258PLANT SOIL ENVIRON., 50, 2004 (6): 257-264 posed of highly oxidised phytoclasts. Oxidation at Bílina is related to paleofires. Leonardite is highly oxidised form of lignite. Our sample represents paleoweathered coal. Other studied materials were: bituminous coal from Kladno (CZ) and anthracite from Lhotice (CZ). This series was completed with industrial carbon-rich materials: coke, activated carbon Filtrasorb F-400 and Multisorb TM 100 (Multisorb TM 100 is the peat-based adsorbent manufactured by PEATEC Corporation, USA). All materials were dried at laboratory temperature, disintegrated and sieved. The fraction size of 1-2 mm was used for all adsorption experiments and surface properties characterization. Fine fraction under 1 mm was used for elementary analyses. The elementary composition was determined by pyrolysis accompanied with measurements using a CarboErba microanalysator (Borkovcová et al. 1986). The relative amount of oxygen containing surface functional groups was determined by Fourier transform infrared (FTIR) spectroscopy. FTIR spectra were recorded with Nicolet 740 spectrometer using the standard KBr pellet technique (Borkovcová et al. 1986). The relative amount of the carboxylic groups was obtained from the FTIR spectrum by integration of the area in the zone between 1500 and 1800/cm (Yang 1997). The cation exchangeable capacity (CEC) was determined in a leachate of 0.1M BaCl 2 (Plume 1990). The mesoand macroporosity were determined by highpressure Hg porosimetry (Mayer and Stowe 1965). This method essentially consists of measuring the extent of mercury penetration into the evacuated solid as a function of applied hydrostatic pressure.The Porosimeter 2000 was used for this purpose. The surface area was measured by the BrunnauerEmmet-Teller (BET) method (Brunauer et al. 1938) with Sorptomatic 1800 CarloErba apparatus. The BET method is based on the measurement of nitrogen adsorption isotherm at the liquid N 2 temperature. Adsorption properties of carbonaceous a...

show abstract

Section: Resultsmentioning

confidence: 99%

“…The Filtrasorb F-400 carbon is characterised also by important microporosity. Micropores (< 2 nm) and mesopores (2-50 nm) in F-400, in particular, are responsible for adsorption of metallic ions from solutions (Abbasi and Streat 1994). Nevertheless a high volume of micropores was observed for peat, spruce wood and fusinite (Table 1).…”

Section: Textural Analysismentioning

confidence: 99%

Adsorption of copper, cadmium and silver from aqueous solutions onto natural carbonaceous materials

Hanzlik¹,

Jehlička²,

Weishauptová³

et al. 2004

PLANT SOIL ENVIRON

View full text Add to dashboard Cite

show abstract

“…As the pH of a uranium solution increases, the uranyl ions are easily hydrolyzed, and these hydrolysis products are also polymerized [33]. Uranium exists in hydrolyzed form, and the following ionic species have been identified: UO 2 2+ , [(UO 2 ) 2 (OH) 2 ] 2+ dimer, and [(UO 2 ) 3 (OH) 5 ] + trimer [34]. It is these species that are exchanged at the functional groups on the composite adsorbent.…”

Section: Effect Of the Phmentioning

confidence: 98%

Adsorption and thermodynamics studies of U(VI) by composite adsorbent in a batch system

Donat

2010

Ionics

View full text Add to dashboard Cite

The adsorption of U(VI) from aqueous solutions onto composite adsorbent (algistar) has been studied using a batch adsorber. The parameters that affect the U(VI) sorption, such as contact time, solution pH, initial U(VI) concentration, and temperature, have been investigated and optimized conditions determined. Equilibrium isotherm studies were used to evaluate the maximum sorption capacity of composite adsorbent, and experimental results showed this to be 43.10 mg/g. The adsorption patterns of metal ions on composite adsorbent followed the Langmuir, Freundlich and Dubinin-Radushkevich (D-R) isotherms. The Freundlich, Langmuir, and D-R models have been applied, and the data correlate well with Langmuir model, and that the sorption is physical in nature (the sorption energy E ads =12.90 kJ/mol). Thermodynamic parameters (ΔH ads o =−41.08 kJ/mol, ΔS ads o =−68.00 J/molK, ΔG ads (298.15 K)=−20.81 kJ/mol) showed the exothermic heat of adsorption and the feasibility of the process. The results suggested that the composite adsorbent is suitable as a sorbent material for recovery and biosorption/adsorption of uranium ions from aqueous solutions.

show abstract

“…One of the most important practical methods for treatment of radioactive waste is adsorption (Abbasi and Streat, 1994;Kim et al, 1995;Tsuji et al, 1993;Srinivasan et al, 1988;Guin and Saha, 2002;Hasany and Saeed, 1992;Rengaraj and Moon, 2002). Cost effective alternative technologies or adsorbents for radioactive metal ions from "wastewater" or treatment are always needed.…”

Section: Introductionmentioning

confidence: 98%

Equilibrium and kinetics study of Gd(III) and U(VI) adsorption from aqueous solutions by modified Sorrel’s cement

2006

View full text Add to dashboard Cite

Modified Sorrel's cement was prepared by the addition of ferric chloride. The modified cement (MF5) was analyzed and characterized by different methods. Adsorption of Gd(III) and U(VI) ions in carbonate solution has been studied separately as a function of pH, contact time, adsorbent weight, carbonate concentration, concentration of Gd(III) and U(VI) and temperature. From equilibrium data obtained, the values of H, S and G were found to equal −30.9 kJ · mol −1 , −85.4 J · mol −1 ·,K −1 , and −5.4 KJ · mol −1 , respectively, for Gd(III) and 18.9 kJ · mol −1 , 67.8 J · mol −1 K −1 and −1.3 KJ · mol −1 , respectively, for U(VI). The equilibrium data obtained have been found to fit both Langmuir and Freundlich adsorption isotherms. The batch kinetic of Gd(III) and U(VI) on modified Sorrel's cement (MF5) with the thermodynamic parameters from carbonate solution were studied to explain the mechanistic aspects of the adsorption process. Several kinetic models were used to test the experimental rate data and to examine the controlling mechanism of the adsorption process. Various parameters such as effective diffusion coefficient and activation energy of activation were evaluated. The adsorption of Gd(III) and U(VI) on the MF5 adsorbent follows first-order reversible kinetics. The forward and backward constants for adsorption, M. S. Gasser ( ) .

show abstract

Adsorption of Uranium from Aqueous Solutions Using Activated Carbon

Cited by 106 publications

References 15 publications

Adsorption of copper, cadmium and silver from aqueous solutions onto natural carbonaceous materials

Adsorption of copper, cadmium and silver from aqueous solutions onto natural carbonaceous materials

Adsorption and thermodynamics studies of U(VI) by composite adsorbent in a batch system

Equilibrium and kinetics study of Gd(III) and U(VI) adsorption from aqueous solutions by modified Sorrel’s cement

Contact Info

Product

Resources

About