About this Journal Submit a Manuscript Table of Contents
Advances in Civil Engineering
Volume 2012 (2012), Article ID 372395, 9 pages
http://dx.doi.org/10.1155/2012/372395
Research Article

Polycyclic Aromatic Hydrocarbons in Urban Stream Sediments

1Department of Civil, Construction and Environmental Engineering, The University of Alabama, Tuscaloosa, AL 35487, USA
2Global Solutions International, LLC, P.O. Box 223, Mobile, AL 36652, USA
3Penn State Harrisburg, Environmental Engineering Program, Middletown, PA 17057, USA

Received 27 July 2011; Revised 20 November 2011; Accepted 16 December 2011

Academic Editor: Cumaraswamy Vipulanandan

Copyright © 2012 Jejal Reddy Bathi et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Polycyclic aromatic hydrocarbons (PAHs) are persistent organic pollutants of high environmental concern with known carcinogenic activity. Although literature documents PAH fate in urban runoff, little is known about their distribution on sediment sizes, which is essential for determining their treatability and fate in receiving waters. This paper has quantified the concentrations of selected PAHs in urban creek sediments and examined possible relationships between sediment PAH content and sediment characteristics, such as particle size, volatile organic content (VOC), and sediment chemical oxygen demand (SCOD). SCOD, VOC, and PAH concentrations of sediments showed a bimodal distribution by particle size. The large diameter sediments had the highest VOC and also had the highest PAH concentrations. The spatial variation of PAH content by sediment sizes also was statistically significant; however, the mass of the PAH material was significantly affected by the relative abundance of the different particle size classes in the sediment mixtures.