NDLI: Adsorption of chromium(VI) onto electrochemically obtained magnetite nanoparticles

Content Provider	Springer Nature Link
Author	Muñoz Bonilla, A. Mazario, E. Martínez, L. J. Recio, F. J. Palomares, F. J. Herrasti, P.
Copyright Year	2015
Abstract	Well-dispersed magnetite nanoparticles of different sizes between 15 and 43 nm were synthesized by an electrochemical method in a controlled manner by simply changing the synthesis temperature. These nanoparticles were used as a reusable adsorbent to remove Cr(VI) from aqueous solution. The recovery efficiency was found to be highly dependent on environmental parameters, such as temperature and pH. In addition, it was demonstrated that the initial concentrations of both Cr(VI) and magnetite nanoparticles strongly influence the removal capability of these nanomaterials. Remarkably, the nanoparticle size has a key role on the Cr(VI) adsorption efficiency, which gradually increases as the diameter decreases due to the augmentation of the surface area. The low aggregation in the case of small particles that results from the low magnetization saturation values also contributes to the enhancement of the surface area available for Cr(VI) adsorption. In contrast, nanoparticles with larger sizes are more easily manipulated by a magnet, and the efficiency is largely maintained after five cycles. The adsorption process fits the Langmuir isotherm model well, and the reaction was found to follow a pseudo-second-order rate.
Starting Page	4017
Ending Page	4024
Page Count	8
File Format	PDF
ISSN	17351472
Journal	International Journal of Environmental Science & Technology
Volume Number	12
Issue Number	12
e-ISSN	17352630
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2015-06-12
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Ecotoxicology Water Management Magnetite nanoparticles Waste Water Technology Cr(VI) removal Adsorption Aquatic Pollution Environment Remediation Water Pollution Control Environmental Chemistry Environmental Science and Engineering Soil Science & Conservation
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Environmental Engineering Agricultural and Biological Sciences

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