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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Naidu, Ravi
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (8/8 displayed)
- 2022Magnetite Nanoparticles Loaded into Halloysite Nanotubes for Arsenic(V) Removal from Watercitations
- 2019Biocompatible functionalisation of nanoclays for improved environmental remediationcitations
- 2018Effect of surface-tailored biocompatible organoclay on the bioavailability and mineralization of polycyclic aromatic hydrocarbons in long-term contaminated soilcitations
- 2017Removal of lead from aqueous solution using superparamagnetic palygorskite nanocompositecitations
- 2017Modified osmium tracer technique enables precise microscopic delineation of hydrocarbon-degrading bacteria in clay aggregatescitations
- 2016Structural, electrokinetic and surface properties of activated palygorskite for environmental applicationcitations
- 2016Surface tailored organobentonite enhances bacterial proliferation and phenanthrene biodegradation under cadmium co-contaminationcitations
- 2015Biomass derived palygorskite-carbon nanocompositescitations
Places of action
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article
Removal of lead from aqueous solution using superparamagnetic palygorskite nanocomposite
Abstract
<p>A palygorskite-iron oxide nanocomposite (Pal-IO) was synthesized in situ by embedding magnetite into the palygorskite structure through co-precipitation method. The physico-chemical characteristics of Pal-IO and their pristine components were examined through various spectroscopic and micro-analytical techniques. Batch adsorption experiments were conducted to evaluate the performance of Pal-IO in removing Pb(II) from aqueous solution. The surface morphology, magnetic recyclability and adsorption efficiency of regenerated Pal-IO using desorbing agents HCl (Pal-IO-HCl) and ethylenediaminetetraacetic acid disodium salt (EDTA-Na<sub>2</sub>) (Pal-IO-EDTA) were compared. The nanocomposite showed a superparamagnetic property (magnetic susceptibility: 20.2 emu g<sup>−1</sup>) with higher specific surface area (99.8 m<sup>2</sup> g<sup>−1</sup>) than the pristine palygorskite (49.4 m<sup>2</sup> g<sup>−1</sup>) and iron oxide (72.6 m<sup>2</sup> g<sup>−1</sup>). Pal-IO showed a maximum Pb(II) adsorption capacity of 26.6 mg g<sup>−1</sup> (experimental condition: 5 g L<sup>−1</sup> adsorbent loading, 150 agitations min<sup>−1</sup>, initial Pb(II) concentration from 20 to 500 mg L<sup>−1</sup>, at 25 °C) with easy separation of the spent adsorbent. The adsorption data best fitted to the Langmuir isotherm model (R<sup>2</sup> = 0.9995) and pseudo-second order kinetic model (R<sup>2</sup> = 0.9945). Pb(II) desorption using EDTA as the complexing agent produced no disaggregation of Pal-IO crystal bundles, and was able to preserve the composite's magnetic recyclability. Pal-IO-EDTA exhibited almost 64% removal capacity after three cycles of regeneration and preserved the nanocomposite's structural integrity and magnetic properties (15.6 emu g<sup>−1</sup>). The nanocomposite holds advantages as a sustainable material (easily separable and recyclable) for potential application in purifying heavy metal contaminated wastewaters.</p>