2024-03-28T16:13:14Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1953502021-12-27T15:51:40Zcom_10261_89com_10261_3col_10261_342
DIGITAL.CSIC
author
Rivera, Fernanda Lyzeth
author
Palomares, F. Javier
author
Herrasti, Pilar
author
Mazarío, Eva
funder
Agencia Estatal de Investigación (España)
funder
Ministerio de Economía y Competitividad (España)
funder
Consejo Nacional de Ciencia y Tecnología (México)
funder
Ministerio de Ciencia, Innovación y Universidades (España)
2019-11-22T14:50:56Z
2019-11-22T14:50:56Z
2019-10-23
Nanomaterials 9(11): 1508 (2019)
http://hdl.handle.net/10261/195350
10.3390/nano9111508
2079-4991
http://dx.doi.org/10.13039/501100003141http://dx.doi.org/10.13039/501100003329http://dx.doi.org/10.13039/501100011033
31652774
Magnetite nanoparticles (Fe3O4) of 12 ± 4 nm diameter are electrochemically synthesized for the adsorption and magnetic harvesting of Cr(VI) from contaminated simulated solutions. The removal of Cr(VI) from aqueous media follows pseudo-second-order kinetics. The adsorption efficiency is evaluated in three different scenarios. In standard conditions, i.e., at room temperature; in a thermal bath working at 60 °C, where the temperature could be considered homogeneous within the solution; and finally, under magnetic induction heating, while adjusting the frequency and magnetic field used to attain the same temperature as in the bath experiments. Two benefits of using a magnetic inductor are demonstrated. First, the removal efficiency is almost doubled in comparison to that of the room temperature experiments, and it is higher by 30% compared to that of the bath setup. At the same time as the adsorption occurs, a redox reaction occurs on the surface of the nanoparticles, and Cr(VI), the predominant species in the contaminated solution, is significantly reduced to Cr(III). Through X-ray photoelectron spectroscopy, it is shown that a greater reduction effect is achieved when working in induction conditions than at room temperature. This is the first time that this synergistic effect using magnetic induction heating has been demonstrated for heavy metal decontamination of wastewater.
en
openAccess
Magnetic inductor
Hot spots
Magnetic harvesting
Water treatment
Heavy metals
Pollutant
Adsorption
Improvement in heavy metal removal from wastewater using an external magnetic inductor
artículo
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URL
https://digital.csic.es/bitstream/10261/195350/1/improvement_heavy_metal_removal_wastewater_magnetic_inductor.pdf
File
MD5
292f22d4d912e0a8cdd9af2c9111f278
3549687
application/pdf
improvement_heavy_metal_removal_wastewater_magnetic_inductor.pdf