Investigation of Heavy Metal Contents of Road-Deposited Sediment in Expressways
Road-deposited sediment (RDS) is an important carrier of heavy metal contaminants. Understanding the contribution of RDS and its potential to runoff pollution is essential for pollution control. Fifty one samples were collected from five different highways of Jilin Province and heavy metal elements (i.e., Cr, Cu, Ni, Pb, and Zn) were estimated in RDS. The RDS particles from all impervious road surfaces were predominantly coarse particles (>250 μm, 50.8-67.7%). The four expressways have higher concentrations of heavy metals in RDS than background concentrations of heavy metal in soils of Jilin Province. The authors' findings imply that RDS from expressway is a potential pollution resource. For controlling runoff pollution from RDS, transportation agencies should pay much attention to expressway maintenance, and improve existing cleaning methods and cleaning frequency into account.
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Supplemental Notes:
- This paper was sponsored by TRB committee AFP40 Physicochemical and Biological Processes in Soils.
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Corporate Authors:
500 Fifth Street, NW
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Authors:
- Wang, Xinjun
- Gao, Shuohan
- Li, Hua
- Kong, Yaping
- Chen, Jiding
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Conference:
- Transportation Research Board 94th Annual Meeting
- Location: Washington DC, United States
- Date: 2015-1-11 to 2015-1-15
- Date: 2015
Language
- English
Media Info
- Media Type: Digital/other
- Features: Figures; References; Tables;
- Pagination: 14p
- Monograph Title: TRB 94th Annual Meeting Compendium of Papers
Subject/Index Terms
- TRT Terms: Expressways; Heavy metals; Highway maintenance; Pollution control; Runoff; Sediments
- Geographic Terms: Jilin Province (China)
- Subject Areas: Environment; Highways; Hydraulics and Hydrology; I15: Environment; I26: Water Run-off - Freeze-thaw;
Filing Info
- Accession Number: 01551545
- Record Type: Publication
- Report/Paper Numbers: 15-2555
- Files: TRIS, TRB, ATRI
- Created Date: Jan 27 2015 11:23AM