The magnetite as adsorbent for some hazardous species from aqueous solutions: A review

TL;DR

This review discusses the potential of magnetite, both natural and synthetic, as an adsorbent for hazardous contaminants in water, emphasizing laboratory studies and the challenges of scaling up, especially with nano-scale particles.

Contribution

It provides a comprehensive analysis of magnetite's use in removing hazardous species from water and highlights the need for scaling laboratory findings to industrial applications.

Findings

Magnetite effectively adsorbs contaminants like uranium and arsenic.

Magnetic properties facilitate device creation for water treatment.

Most studies are limited to laboratory scale, with scalability challenges.

Abstract

The review refers to the adsorption/desorption possibility of the magnetite, both natural and synthetic, with respect to hazardous species dissolved in aqueous solutions. The analysis stresses the attention on typical contaminants such as uranium, cadmium, cobalt, europium and arsenic. Most of the studies, performed so far, are on a laboratory scale without any attempts to be applied at larger either pilot or industrial scales. This especially invokes an analysis addressing what it would be when the scale of application increases beyond that of the laboratory flask. This point is of primary importance when fashionable nano-scale magnetite particles are used for sorption. The choice of magnetite is special because this mineral exhibits strong magnetic properties easily allowing creation of devices and processes for both upstream (adsorption) and downstream/ deposition processes such as fixed bed adsorption, magnetically stabilized beds, magnetic separation, and remote deposition of dangerous materials.