Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Impact of size and sorption on degradation of trichloroethylene and polychlorinated biphenyls by nano-scale zerovalent iron

Published

Author(s)

Elijah J. Petersen, Roger A. Pinto, Xiangyang Shi, Qingguo Huang

Abstract

Nano-scale zerovalent iron (nZVI) has been studied in recent years for environmental remediation applications such as the degradation of chlorinated organic contaminants. To overcome limitations related to the transport of nZVI, it is becoming common to add a polymer stabilizer to limit aggregation and enhance the particle reactivity. Another method investigated to enhance particle reactivity has been to limit particle size through novel synthesis technique. However, the relative impacts of particle size and interactions of the chemicals with the coatings are not yet well understood. The purpose of this study was to investigate the mechanisms of particle size and polymer coating or polyelectrolyte multilayer (PEM) synthesis conditions on degradation of two common chlorinated contaminants (trichloroethylene (TCE) and polychlorinated biphenyls (PCBs)). This was accomplished using two different synthesis techniques, a layer-by-layer approach at different pH values and a iron reduction in the presence of varying concentrations of poly(acrylic acid), with and without palladium. nZVI produced by both techniques yielded higher degradation rates than a traditional approach. The mechanistic investigation indicated that hydrophobicity and sorption to the multilayer impacts the availability of the hydrophobic compound to the nZVI and that particle size also had a large role with smaller particles having stronger rates.
Citation
Journal of Hazardous Materials

Citation

Petersen, E. , Pinto, R. , Shi, X. and Huang, Q. (2012), Impact of size and sorption on degradation of trichloroethylene and polychlorinated biphenyls by nano-scale zerovalent iron, Journal of Hazardous Materials (Accessed December 6, 2023)
Created September 28, 2012, Updated February 19, 2017