Efficiency of natural and acid-activated clays in the removal of Pb(II) from aqueous solutions

Eloussaief, Mabrouk; Benzina, Mourad

doi:10.1016/j.jhazmat.2010.02.004

Cited by 158 publications

(64 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To achieve this goal, three thermodynamic parameters, including Gibbs free energy (DG°), enthalpy (DH°), and entropy change (DS°), were determined by the following equations (Eloussaief and Benzina 2010;Eloussaief et al 2011;Ozdes et al 2011)…”

Section: Thermodynamic Parametersmentioning

confidence: 99%

“…Various industrial processes, including metal plating, fertilizer production, mining, metallurgy, battery manufacturing and textile dyeing, and others, are the main sources of heavy metals Messaoudi et al 2009;Eloussaief and Benzina 2010). The fate of the metals in aquatic system can be variable, depending upon their initial form and the chemical and physical characteristics of the receiving water body.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Adsorption of copper and zinc onto natural clay in single and binary systems

Sdiri

Higashi

Jamoussi³

2013

Int. J. Environ. Sci. Technol.

View full text Add to dashboard Cite

Calcareous and smectitic clay samples from the Coniacian-Lower Campanian system, Tunisia, were used as adsorbents for the removal of copper and zinc from aqueous solutions in single and binary systems. Calcareous clay sample was treated with acetic acid to obtain carbonate-free sample that was also used for metals removal. The adsorption of metal ions onto natural clay was tested in a batch method by mixing 1 g/L of each sample with a metal ion solution of zinc (300 lmol/L) and/or copper 600 lmol/L under the operating pH of 6, and agitation speed of 200 rpm within the equilibrium time of 60 min at 25°C for single and binary systems. Our results showed that natural clay samples were mainly composed of silica, alumina, iron, and magnesium oxides. Adsorption data showed that the studied clay samples removed substantial amounts of heavy metals in single and mixed systems. Initial solution pH and carbonates contents enhanced the removal capacities of the studied clay samples, confirming their strong influencing effects. Thermodynamic parameters indicated an endothermic adsorption for metals removal by calcareous clay, but exothermic process for the smectitic sample. These results suggest that the Late Cretaceous clays, Tunisia, can be effectively used as natural adsorbents for the removal of toxic heavy metals in aqueous systems.

show abstract

Section: Thermodynamic Parametersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Adsorption of copper and zinc onto natural clay in single and binary systems

Sdiri

Higashi

Jamoussi³

2013

Int. J. Environ. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…ion from the minerals interface to the solution and confirms that at high temperatures; adsorption of Zn 2? ions onto sepiolite could be considered as an exothermic phenomenon (Saltali et al 2007;Eloussaief and Benzina 2010). This will be further discussed in relation to the thermodynamic parameters in ''Thermodynamic of sorption'' section.…”

Section: Kinetic Studiesmentioning

confidence: 99%

Kinetics and thermodynamics of zinc removal from a metal-plating wastewater by adsorption onto an Iranian sepiolite

Hojati

Landi

2014

Int. J. Environ. Sci. Technol.

View full text Add to dashboard Cite

The study of the kinetics and thermodynamics of the adsorption process can provide valuable information for the proper design and control of adsorption systems. The influence of temperature on the kinetics of Zn 2?sorption on an Iranian sepiolite sample was investigated through a series of batch experiments. Consistent with an exothermic reaction, an increase in the temperature resulted in decreasing Zn 2? adsorption rate. The sorption kinetics was tested for pseudo-first-order, pseudo-secondorder, and intraparticle diffusion models, and the rate constants were calculated. Results showed that the adsorption kinetics followed the pseudo-second-order kinetic model. The intraparticle diffusion model described that sorption of Zn onto the sepiolite particles is a two-step process, and intraparticle diffusion is not the only ratelimiting step. The results obtained from the study of thermodynamic data indicated that sorption of Zn onto sepiolite is non-spontaneous and less favored at higher temperatures.

show abstract

“…Due to its high degree of micro-porosity, the activated china clay has a high moisture adsorption/ desorption capacity within the normal indoor temperature and relative humidity ranges. Previous researches (Haneed, 2007;Eloussaief and Benzina, 2010) have shown that china clay can control the indoor relative humidity level by adsorbing moisture when the indoor moisture level is high and by desorbing moisture when it is low. Since both of the mineral boards have very similar sand patterns on the surfaces, it is not easy to distinguish the new mineral fiber board from the ordinary board.…”

Section: Tested Building Materialsmentioning

confidence: 99%

The Hygric Performances of Moisture Adsorbing/Desorbing Building Materials

Kim

Lee

et al. 2010

Aerosol Air Qual. Res.

View full text Add to dashboard Cite

Controlling indoor relative humidity is of great importance in the evaluation of thermal comfort and perceived air quality. This study aimed to develop a new mineral fiber board as an interior surface material with high capacity of moisture adsorption and desorption. A series of experiments were carried out in this study using an accurately controlled chamber, mock-up rooms, and real-scale test houses. The chamber test was conducted to measure the moisture adsorption and desorption content of the materials. In the mock-up rooms, the effects of the new mineral fiber board on indoor humidity were investigated under three different conditions. The three different conditions include: 1) a mock-up room with an electric humidifier, 2) a mock-up room with an open water basin, and 3) a mock-up room without artificial humidifying measures. In the real-scale test houses, the efficiency of the new mineral fiber board was also investigated under two different conditions of low-humidity and very high-humidity. Through the chamber test, it was found that the moisture adsorption content of the new mineral fiber board was three times more than that of the ordinary mineral fiber board. The moisture desorption content of the new board was also two and half times more than that of the ordinary mineral fiber board. In the mock-up test, the newly developed mineral fiber board could also control indoor humidity levels effectively by desorbing moisture under low humidity conditions. However, through the real-scale test, it was found that the new mineral fiber board could not absorb or desorb indoor moisture effectively if extremely dry or humid conditions last for a long time. Overall, the new mineral fiber board was proven to be effective in controlling indoor moisture except under extremely dry or humid conditions.

show abstract

Efficiency of natural and acid-activated clays in the removal of Pb(II) from aqueous solutions

Cited by 158 publications

References 21 publications

Adsorption of copper and zinc onto natural clay in single and binary systems

Adsorption of copper and zinc onto natural clay in single and binary systems

Kinetics and thermodynamics of zinc removal from a metal-plating wastewater by adsorption onto an Iranian sepiolite

The Hygric Performances of Moisture Adsorbing/Desorbing Building Materials

Contact Info

Product

Resources

About