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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
Magnetite Nanoparticles Loaded into Halloysite Nanotubes for Arsenic(V) Removal from Water
Abstract
<p>Groundwater contaminated by arsenic (As) is a serious concern because it poses a significant threat to millions of people reliant on both drinking and irrigation of farms. Hence, the low-cost and efficient treatment of these waters is of utmost importance. This study presents the ecofriendly synthesis of magnetite nanoparticles (Fe<sub>3</sub>O<sub>4</sub>NPs)-immobilized halloysite nanotube (HNT) composite (Fe<sub>3</sub>O<sub>4</sub>@HNT) for remediating arsenate [As(V)] from water. High-resolution transmission electron microscopy confirmed that ultrasmall Fe<sub>3</sub>O<sub>4</sub>NPs (4.52 ± 1.63 nm) were immobilized on the interior surface of HNT. Fe<sub>3</sub>O<sub>4</sub>@HNT possesses a larger surface area (82 ± 0.23 m<sup>2</sup>/g) and a higher thermal stability (7.1% weight loss at 950 °C) than a pristine HNT (47.23 ± 0.14 m<sup>2</sup>/g and 12.6%, respectively). Adsorption kinetics were best fitted with pseudo-second-order and intraparticle diffusion, while the isotherms results were best supported with the Freundlich model (R<sup>2</sup>= 0.99 in each case). Therefore, it could be surmised that multiphase rate-controlling chemisorption occurred during adsorption. The thermodynamics data revealed the endothermic nature of As(V) adsorption by Fe<sub>3</sub>O<sub>4</sub>@HNT. Fourier transform infrared and X-ray photelectron spectroscopy analyses confirmed chemical bonding between As and Fe. In addition, Fe<sub>3</sub>O<sub>4</sub>@HNT was easily separable by an external magnet (the saturation magnetization value was 20 emu/g), which is an additional benefit of the material to be used on an industrial scale. The material was also reusable after regeneration for five rounds of consecutive sorption-desorption with excellent efficiency and no substantial loss of structural integrity. Furthermore, Fe<sub>3</sub>O<sub>4</sub>@HNT removed more than 99% As(V) from the groundwater, signifying its viability in real-case implementation. Cost-benefit analysis ensured that Fe<sub>3</sub>O<sub>4</sub>@HNT was cost-effective, while its biocompatibility test confirmed no detrimental impact on soil bacterial growth once the spent material had been disposed. Consequently, cheap, easily separable, reusable, and biocompatible Fe<sub>3</sub>O<sub>4</sub>@HNT may be a prospective composite for the sustainable eradication of As and other metallic toxicants from wastewater.</p>