Leaching of milled asphalt pavement amended with waste to energy ash
by Brajesh Dubey, Timothy Townsend
International Journal of Environment and Waste Management (IJEWM), Vol. 1, No. 2/3, 2007

Abstract: The environmental suitability of using Waste-to-Energy (WTE) ash as a partial substitute for aggregate in hot-mix asphalt concrete was investigated using a series of leaching lysimeters. Eight samples of processed asphalt concrete manufactured with 25% by weight WTE ash as aggregate were leached using stainless steel lysimeters. A ninth lysimeter contained asphalt without WTE ash. Simulated rainfall was passed through the processed asphalt concrete to simulate pollutant leaching that might occur from stockpiled or disposed milled asphalt. Leachate samples were collected every five days for 75 days and analysed for lead, Total Dissolved Solids (TDS), aluminium, and chloride. Polychlorinated dibenzo-p-dioxins polychlorinated dibenzofurans, and polycyclic aromatic hydrocarbons were analysed in the first flush leachates but were not detected. Although previous batch leaching studies found lead, chloride, TDS, and aluminium to present possible risk to groundwater, the lysimeter leachates found only aluminium concentrations to remain above water quality standards throughout the experiment. Lead was detected only sporadically, and TDS and chloride diminished to below water quality thresholds early in the experiment. The source of the aluminium was the WTE ash.

Online publication date: Wed, 09-May-2007

The full text of this article is only available to individual subscribers or to users at subscribing institutions.

Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.

Pay per view:
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.

Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Environment and Waste Management (IJEWM):
Login with your Inderscience username and password:

    Username:        Password:         

Forgotten your password?

Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.

If you still need assistance, please email subs@inderscience.com