Abstract
The carbon gel and carbon gel doped with 0.5, 1 and 2 wt% of graphite intercalation compound were used for the removal of heavy metals from aqueous solutions. These materials were prepared by a sol-gel process that involves a polycondensation of resorcinol and formaldehyde. Nitrogen adsorption, scanning electron microscopy, energy dispersive spectroscopy and fourier transform infrared spectroscopy were used for a morpho-structural adsorbent investigation. In the present paper, Cu, Co, Pb and Ni ions adsorption experiments were carried out in batch conditions under magnetic stirring. The effect of some parameters such as contact time, metal ions’ concentration and pH were examined. Adsorption data on all sorbents, followed both the Frendlich and Langmuir models. The data better fitted the Langmuir isotherm than the Frendlich one. The highest degree of removal was achieved for Pb ions at the initial concentration of 10 mg/l and for 2 g/l adsorbent dose. Adsorption results expressed as adsorption capacities showed that carbon gel doped with 2 wt% of graphite intercalation compound is the best adsorbent.Graphical
Highlights
IntroductionElectronic supplementary material The online version of this article (doi:10.1007/s10971-016-4256-0) contains supplementary material, which is available to authorized users
Electronic supplementary material The online version of this article contains supplementary material, which is available to authorized users.The development of industrial activities is causing an increasing amount of wastewater
The products obtained in this work were labelled as follows: CG—carbon gel, CG-0.5GIC—carbon gel doped with 0.5 wt% of graphite intercalation compounds (GICs), CG-1.0GIC—carbon gel doped with 1.0 wt% of GIC, CG-2.0GIC—carbon gel doped with 2.0 wt% of GIC
Summary
Electronic supplementary material The online version of this article (doi:10.1007/s10971-016-4256-0) contains supplementary material, which is available to authorized users. The development of industrial activities is causing an increasing amount of wastewater. Among the many contaminants found in wastewater, particular attention should be paid to heavy metals. The presence of heavy metals results in negative effects on human life and the environment due to their high toxicity. The increased awareness and concern about the natural world as well as strict legislation have contributed to more efforts in research within the area of finding efficient techniques for removing these contaminants from wastewater.
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