Adsorption of copper ions on two clays from Tunisia: pH and temperature effects

Eloussaief, Mabrouk; Jarraya, Ikram; Benzina, Mourad

doi:10.1016/j.clay.2009.10.008

Cited by 76 publications

(23 citation statements)

References 12 publications

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“…The raw clay was crushed and the fraction of 2 lm was separated by sedimentation and centrifugation [23]. This clay fraction was converted into Na 1 saturated form by means of repeated washing: At the beginning, 1.0 M NaCl was first used; then we use the deionised water.…”

Section: Methodsmentioning

confidence: 99%

Wastewaters decontamination: Mechanisms of PB(II), ZN(II), and CD(II) competitive adsorption on tunisian smectite in single and multi‐solute systems

Eloussaief

Hamza

Kallel

et al. 2012

Env Prog and Sustain Energy

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Polluted water may contain more than one heavy metal species. Consequently, the behavior of a particular metal in a water system may be affected by the presence of the others. In this study, the adsorption of Pb(II), Zn(II), and Cd(II) in single and multi‐element systems onto raw, acid‐activated, and aluminum‐pillared Tunisian smectite (RSM, ASM, and Al‐SM, respectively) was investigated as a function of pH and species concentrations. Physico‐chemical, Textural, XRD, and SEM analyses were investigated onto three different clay materials. The Al‐SM samples, which were calcined at 450°C, presented the best results for the surface areas (267 m2/g) and for the Pb(II) adsorption capacity (75.35 mg/g). For instance, once they contained in a batch system at 25°C, pH 6, they retained more heavy metals due to their textural characteristics. The selected order of adsorption Pb(II) > Zn(II) > Cd(II) showed the importance of the competitive phenomenon onto clay materials' pores adsorption. At a higher pH, the precipitation phenomenon was possible. The two‐site, Langmuir isotherm also yielded the best fit for Pb(II) and Zn(II) adsorption on RSM and Al‐SM in binary and ternary solute‐systems. However, it failed in the case of Pb(II), Zn(II), and Cd(II) on ASM, which had less heterogeneity than other samples. The obtained results can serve as baseline data to design an adsorption process using this local adsorbent for the wastewaters rich in heavy metals. © 2012 American Institute of Chemical Engineers Environ Prog, 32: 229‐238, 2013

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Section: Methodsmentioning

confidence: 99%

Wastewaters decontamination: Mechanisms of PB(II), ZN(II), and CD(II) competitive adsorption on tunisian smectite in single and multi‐solute systems

Eloussaief

Hamza

Kallel

et al. 2012

Env Prog and Sustain Energy

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“…In Tunisia, the use of natural clays as local adsorbents for the removal of heavy metals has been extensively investigated (Chaari et al 2008;Eloussaief et al 2009Eloussaief et al , 2011Eloussaief and Benzina 2010;Ghorbel-Abid et al 2010;Sdiri et al 2011a). Among the studied natural clayey deposits, the Coniacian-Lower Campanian clays of the Aleg formation, discovered in Jebel Oum el Aleg to the north of Gafsa area (south of Tunisia), has the required technical specifications for use in various industrial applications, especially for heavy metal removal (Chaari et al 2008;Sdiri et al 2010a).…”

Section: Introductionmentioning

confidence: 99%

Competitive Removal of Heavy Metals from Aqueous Solutions by Montmorillonitic and Calcareous Clays

Sdiri

Higashi

Chaabouni

et al. 2011

Water Air Soil Pollut

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A batch sorption method was used to study the removal of few toxic metals onto the Late Cretaceous clays of Aleg formation (Coniacian-Lower Campanian system), Tunisia, in single, binary and multi-component systems. The collected clay samples were used as adsorbents for the removal of Pb(II), Cd(II), Cu(II) and Zn(II) from aqueous solutions. Results show that the natural clay samples were mainly composed of silica, alumina, iron and magnesium oxides. N 2 -adsorption measurements indicated mesoporous materials with modest specific surface area of <71 m 2 /g. Carbonate minerals were the most influencing parameters for heavy metal removal by natural clays in both single and multi-element systems. The affinity sequence was Pb(II)>Cu(II)>Zn(II)>Cd(II) due to the variable physical properties of the studied metals. The maximum adsorption capacity reached 131.58 mg/g in single systems, but decreased to <50.10 mg/g in mixed systems. In single, binary and muti-element systems, the studied clay samples removed substantial amounts of heavy metals, showing better effectiveness than the relevant previous studies. These results suggest that the studied clay samples of the Late Cretaceous clays from Tunisia can be effectively used as natural adsorbents for the removal of toxic heavy metals in aqueous systems.

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“…Atomic absorption «analytik jena: ZEE nit 700» apparatus type was used for the determination of the raw materials' chemical composition. The loss on the ignition (LOI) of the raw materials was determined by calcination at 1000°C (Eloussaief et al 2009). The mineralogical composition of the studied material was performed only on powder diffractograms by X-ray diffraction (XRD).…”

Section: Experimental Techniquesmentioning

confidence: 99%

Application of Tunisian limestone material for chlorobenzene adsorption: characterization and experimental design

et al. 2015

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This study has been undertaken to the optimization of chlorobenzene adsorption of onto carbonate material outcropping in Tataouine region located in Southern Tunisia. Response surface methodology was adopted as a tool for the experimental design; A Hoke D6 experimental design model was applied. In order to improve the adsorption capacity of raw material, different adsorbents were prepared by addition of three salts (Na 2 SO 3 , NaCl and Na 2 SO 4 ) and then heated to 300, 450 and 600°C. The obtained results indicated that the studied samples were mainly composed of calcite. Temperature and salt concentration were the most controlling factors in activation process. Optimum adsorption conditions were obtained for 5 % of NaCl as activation salt and 450°C of activation temperature of carbonate samples. The activated carbonate showed an increase in its porosity (8 to 58.35 %) and surface area (2-14.6 m 2 g −1 ). Moreover, chlorobenzene adsorbed amount showed an enhanced value, varying from 30 to 120 mg g −1 at 25°C.

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Adsorption of copper ions on two clays from Tunisia: pH and temperature effects

Cited by 76 publications

References 12 publications

Wastewaters decontamination: Mechanisms of PB(II), ZN(II), and CD(II) competitive adsorption on tunisian smectite in single and multi‐solute systems

Wastewaters decontamination: Mechanisms of PB(II), ZN(II), and CD(II) competitive adsorption on tunisian smectite in single and multi‐solute systems

Competitive Removal of Heavy Metals from Aqueous Solutions by Montmorillonitic and Calcareous Clays

Application of Tunisian limestone material for chlorobenzene adsorption: characterization and experimental design

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