IRON BASED IMMOBILIZATION FOR METAL CONTAMINATED SOILS

Main Article Content

ABIOYE O. FAYIGA

Abstract

Remediation of contaminated soils is an important task which aims to reduce the impact of toxic metalloids
such as Cd, Cu and As on public health. In-situ immobilization via the addition of soil amendments such
as iron based materials reduces the mobility and transport of these toxic metalloids in the environment. A
wide range of iron-based materials have been used for metal immobilization in contaminated soils
including iron oxides, zerovalent iron, nano-zerovalent iron (nZVI), iron salts, green synthesized iron oxide
nanoparticle (GION) or phytogenic iron oxides nanoparticles (PION), Fe-Al layered double hydroxide
and CMC (carboxymethylcellulose) based iron. The reactivity and surface area of zerovalent iron is
increased at the nanoscale when utilized as nZVI thereby increasing its effectiveness as demonstrated by
previous studies. The efficiency of nZVI in remediation of contaminated soils is limited by the strong
tendency of its particles to agglomerate. In order to overcome this limitation and facilitate the delivery and
mobility of nZVI in soils, nZVI is immobilized onto a carrier such as resin, potato starch, zeolite, or
mesoporous silica or by increasing colloidal stability with the addition of other soil amendments. Even
though, there is g rowing concern over the environmental impact of nanoparticles, the use of plant extracts
to synthesize iron nanoparticles is environmentally friendly and economical.

Article Details

How to Cite
ABIOYE O. FAYIGA. (1). IRON BASED IMMOBILIZATION FOR METAL CONTAMINATED SOILS. International Journal of Agricultural and Environmental Research, 6(1), 1-16. Retrieved from https://ijaaer.com/ojs/index.php/ijaaer/article/view/212
Section
Environmental Sciences
Author Biography

ABIOYE O. FAYIGA

Chemistry Program
School of Natural Sciences and Mathematics
Stockton University, Galloway, NJ