Spinel ferrite magnetic adsorbents: Alternative future materials for water purification?

Removal of contaminants in wastewater, such as heavy metals, has become a severe problem in the world. Numerous technologies have been developed to deal with this problem. As an emerging technology, nanotechnology has been gaining increasing interest and many nanomaterials have been developed to remove heavy metals from polluted water, due to their excellent features resulting from the nanometer effect. In this work, novel nanomaterials, including carbon-based nanomaterials, zero-valent metal, metal-oxide based nanomaterials, and nanocomposites, and their applications for the removal of heavy metal ions from wastewater were systematically reviewed. Their efficiency, limitations, and advantages were compared and discussed. Furthermore, the promising perspective of nanomaterials in environmental applications was also discussed and potential directions for future work were suggested.

https://www.mdpi.com/2079-4991/9/3/424/pdf

Nanomaterials for the Removal of Heavy Metals from Wastewater

Emerging natural and tailored materials for uranium-contaminated water treatment and environmental remediation

Recent progress and future challenges on the use of high performance magnetic nano-adsorbents in environmental applications

This review presents a holistic analysis of the synthesis and efficacy of nanosorbents towards the waste water purification by the removal of selected heavy metal ions, with special emphasis on the effect of functionalization of nanoadsorbents on certain key properties such as surface area, separation and adsorption capacity. We have compiled enormous data based on the characteristic properties of nanomaterials and their selective affinity towards certain heavy metal ions. The experimental factors like pH, adsorbent dosage, contact time, temperature, initial ion concentration and ionic strength affecting metal ion removal have also been explored. Besides, the different adsorption kinetics and adsorption isotherm models are discussed with the help of various illustrations to have an insight into the adsorption procedure.

Role of nanomaterials as adsorbents in heavy metal ion removal from waste water: A review

Sol-Gel Methods for Materials Processing

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Synthesis of mesoporous silica-tethered phosphonic acid sorbents for uranium species from aqueous solutions

We have investigated the removal of Pb2+ ions from water using thiol-functionalized, cobalt-ferrite, magnetic nanoparticles. These magnetic nanoparticles were prepared using the co-precipitation method and their surfaces were modified with tetraethoxy silane and 3-mercaptopropyl trimethoxysilane in order to provide a sufficient surface concentration of the thiol (–SH) functional groups. The adsorption of the Pb2+ ions from the aqueous solutions onto the thiol-functionalized, cobalt-ferrite, magnetic nanoparticles was studied. The investigated parameters include the pH value of the model water, the concentration of the adsorbent, the contact time and the temperature of adsorption. The removal of the Pb2+ was found to be greater at the higher pH values and increasing the temperature was also found to increase the removal of Pb2+ ions.

Yuriy L. Zub

Papers

Sol-Gel Methods for Materials Processing

Synthesis of mesoporous silica-tethered phosphonic acid sorbents for uranium species from aqueous solutions

Removal of Pb(II) ions from aqueous systems using thiol-functionalized cobalt-ferrite magnetic nanoparticles

Bifunctional silica nanospheres with 3-aminopropyl and phenyl groups. Synthesis approach and prospects of their applications

Sorption properties of porous spray-dried microspheres functionalized by phosphonic acid groups