Cadmium Removal from Aqueous Solution by a Tunisian Smectitic Natural and Activated Clay: Thermodynamic Study
L . Khalfa,M. Bagane +1 more
- Vol. 1, Iss: 4, pp 65-71
TLDR
In this paper, the capacity of fixing of cadmium present in aqueous solution, by two types of clay: natural and activated, was investigated using batch experiments and the experimental data obtained were evaluated and fitted using adsorbent equilibrium isotherms.Abstract:
The removal of heavy metals from industrial waste streams has become one of the most important applications in wastewater treatment in terms of protecting public health and environment. The recovery of metals present in the industrial effluents by adsorption onto natural materials constitutes a technological option increasingly studied throughout the world. However, the implementation of such process on an industrial scale requires the use of adsorbents easily available and inexpensive. Clay in these two forms natural and activated answers very well to these two requirements. The present research aimed the study of the capacity of fixing of cadmium present in aqueous solution, by two types of clay: natural and activated. The adsorption capacity of adsorbent was investigated using batch experiments. The influence of pH, temperature and adsorbent dose were investigated and the experimental data obtained were evaluated and fitted using adsorbent equilibrium isotherms. Adsorption isotherms of cadmium onto natural and activated clay were determined and correlated with common isotherm equations such as the Langmuir and Freundlich models. The Langmuir model agrees very well with experimental data. The thermodynamic parameters obtained indicated that the adsorption of cadmium ions onto natural clay was a spontaneous and an endothermic process.read more
Citations
More filters
Journal ArticleDOI
Removal of Heavy Metals and Metalloids from Water Using Drinking Water Treatment Residuals as Adsorbents: A Review
TL;DR: A survey of the literature shows that water treatment residuals may be a suitable material for developing an efficient adsorbent for the removal of heavy metals and metalloids from water as discussed by the authors.
Journal ArticleDOI
Determination of key components and adsorption capacity of a low cost adsorbent based on sludge of drinking water treatment plant to adsorb cadmium ion in water
TL;DR: A low cost adsorbent based on sludge of drinking water treatment plant (DWTP), solid waste byproduct of sedimentation process in the DWTP, was studied for adsorption of cadmium ion in water as discussed by the authors.
Journal ArticleDOI
Efficient removal of cadmium and 2-chlorophenol in aqueous systems by natural clay: Adsorption and photo-Fenton degradation processes
Haithem Bel Hadjltaief,Ali Sdiri,Wahida Ltaief,Patrick Da Costa,Maria Elena Galvez,Mourad Ben Zina +5 more
TL;DR: In this paper, photo-fenton processes were used as handy tools to ascertain the capability of natural clays to remove cadmium (Cd) and 2-chlorophenol (2-CP) from aqueous solution.
Journal ArticleDOI
Multi-element modeling of heavy metals competitive removal from aqueous solution by raw and activated clay from the Aleg formation (Southern Tunisia)
TL;DR: In this paper, a representative clay sample was collected from the outcropping feature of the Aidoudi area to the west of Gabes city; it followed a simple treatment to enhance its physicochemical properties.
Journal ArticleDOI
Agar-encapsulated adsorbent based on leaf of platanus sp. to adsorb cadmium ion in water.
TL;DR: The bio-adsorbent developed based on leaf of platanus sp.
References
More filters
Journal ArticleDOI
Sorption characteristics of lead and cadmium in some soils of India
Tapan Adhikari,Muneshwar Singh +1 more
TL;DR: In this paper, the authors evaluate the sorption mechanism of heavy metals viz. cadmium (Cd) and lead (Pb) in major soil types, an experiment was conducted on Vertic Ustochrept, Typic Eutrochrept and Haplustalf representing five agroecological zones (AEZ) of India.
Journal ArticleDOI
Adsorption characteristics of Cd(II) from aqueous solution onto activated palygorskite
Wenji Wang,Hao Chen,Aiqin Wang +2 more
TL;DR: In this article, a series of activated palygorskites were prepared by acid treatment and heat treatment, and the activated samples were applied as adsorbents for the removal of Cd(II) from aqueous solutions.
Journal ArticleDOI
Correlation between surface properties and catalytic activity of clay catalysts
TL;DR: In this article, a set of catalysts, prepared by the acid activation of bentonitic clay collected from Kutch district of Gujarat, India, were used for benzylation of substituted benzenes.
Journal ArticleDOI
Influence of Acid Activation of Kaolinite and Montmorillonite on Adsorptive Removal of Cd(II) from Water
TL;DR: In this article, two common clay minerals, kaolinite and montmorillonite, are activated by treating with 0.25 M H2SO4, and the effects of acid treatment are monitored with XRD and FTIR measurements and by measuring changes in surface area and the cation exchange capacity (CEC).
Journal ArticleDOI
The effect of pH on the retention of Cu, Pb, Zu and Cd by clay-humic acid mixtures
TL;DR: The amount of metal ion sorbed by the solids increased with increasing pH over the range 3 to 6, and with mixtures of clay-cellulose or illite-humic acid the uptake corresponded to the direct addition of individual substrate adsorption values as mentioned in this paper.