Nanosized magnetite in low cost materials for environmental remediation of wastewater polluted with toxic metals (Hg, Cd, As, Pb and Cr), azo- and antraquinonic dyes

MARIA FERNANDA HORST; VERONICA LASSALLE; MARÍA LUJÁN FERREIRA

Frontiers of Environmental Science & Engineering

SPRINGER

Año: 2015 vol. 9 p. 746 - 769

2095-2201

Abstract Nanosized magnetite has emerged as anadsorbent of pollutants in water remediation. Nanoadsorbents include magnetic iron oxide and its modifiers/stabilizers, such as carbon, silica, clay, organic moieties(polymers, aminoacids, and fatty acids) and other inorganicoxides. This review is focused on the recent developments on the synthesis and use of magneticnanoparticles and nanocomposites in the treatment ofcontaminated water. The emphasis is on the influence ofthe iron oxide modifiers on some properties of interest suchas size, BET area, and magnetization. The characteristics of these nanomaterials are related to their ability to eliminate heavy metal ions and dyes from wastewater. Comparative analysis of the actual literature was performed aiming to present the magnetic material, its preparation methodology and performance in the elimination of the selected pollutants. Vast information has been properly summarized according to the materials, their properties and preferential affinity for selected contaminants. The mechanisms governing nanomaterials formation as well as the interactions with heavy metals and dyes have been carefully analyzed and associated to their efficiency.