Magnetic nano- and microparticles for metal removal and environmental applications: a review

Coating Fe3O4 Magnetic Nanoparticles with Humic Acid for High Efficient Removal of Heavy Metals in Water

“…The unique properties of nanosorbents are providing unprecedented opportunities for the removal of metals in highly efficient and cost-effective approaches, and various nanoparticles and dendrimers have been exploited for this purpose (6)(7)(8). Although the biomedical applications of magnetite nanoparticles were extensively researched (9)(10)(11)(12), only limited research on its application in the environmental area were reported (13)(14)(15)(16)(17). While magnetite (13) and maghemite (14) nanoparticles were applied to the removal of Cr(VI), chitosan-bound Fe3O4 magnetic nanoparticles were prepared for the removal of Cu(II) ions (15).…”

“…While magnetite (13) and maghemite (14) nanoparticles were applied to the removal of Cr(VI), chitosan-bound Fe3O4 magnetic nanoparticles were prepared for the removal of Cu(II) ions (15). Ngomsik et al (16) gave a mini review on the application of magnetic nanoand microparticles in the removal of metals in wastewaters. Recently, monodisperse Fe3O4 nanocrystals were exploited to remove arsenic from water with magnetic separations at very low magnetic field gradients (17).…”

A comparative study about the effects of isomorphous substitution of transition metals (Ti, Cr, Mn, Co and Ni) on the UV/Fenton catalytic activity of magnetite

“…With the merits of strong catalytic activity, great reserves and excellent environmental compatibility, magnetite has been widely applied in environmental remediation in these years [1][2][3][4][5], and its role in environmental self-purification also has become a research hotspot [6,7]. In the natural world, partial iron ions in the inverse spinel structure of magnetite are isomorphously replaced by some transition metal ions, e.g.…”

Novel ferromagnetic nanoparticle composited PACls and their coagulation characteristics

“…Unlike ordinary ferromagnetic particles, superparamagnetic materials have no hysteresis effect e once the external magnetic field is cut off, the remnant magnetism will disappear. This characteristic is favored the magnetic separation process since the magnetic sludge or flocs may be easily scraped when the magnetic field is off (Ngomsik et al, 2005).…”