文档介绍：Advances in Environmental Research 4Ž. 2000 313᎐323
Temporal variation of leachate quality in seawater
saturated fills
R. Khoury, M. El-FadelU, S. Sadek, G. Ayoub
Department of Ci¨il and En¨ironmental Engineering, American Uni¨ersity of Beirut, Lebanon
Accepted 26 June 2000
Abstract
Many waste fills are located along the coast, often encroaching into the sea, and are consequently subjected to
seawater intrusion. Although previous investigations have demonstrated the beneficial effects of moisture addition on
biodegradation processes, these studies have not considered the potential effects of seawater intrusion into a sea fill.
In this study, a preliminary laboratory-scale experiment was conducted to evaluate the potential effects of seawater
intrusion on biodegradation processes and leachate quality. Chemical analysis was performed on leachate samples
for a period of 230 days to study the temporal variation of leachate quality in the early stages of refuse
position. Leachate samples were collected weekly and several parameters were monitored including pH, COD,
TOC, TDS, EC, chlorides, sulfates, orthophosphates, nitrates, ammoniacal nitrogen, hardness, and heavy metals.
Chemical concentration levels were related to biological activity within the test cells, and the results indicate that salt
water could delay MSW biodegradation. ᮊ 2000 Elsevier Science Ltd. All rights reserved.
Keywords: Solid waste; Sea fill; Leachate quality; Seawater intrusion
1. Introduction landfilling strategies focused on minimizing the amount
of water infiltrating through the cover to reduce
leachate management requirements. However, mois-
Landfilling remains the most economical method of
ture minimization delays biodegradation and stabiliza-
solid waste disposal. However, landfills may constitute
tion processes, leading to longer times to put the land-
a severe environmental hazard, particularly because of
fill area to a beneficial use. Recent landfilling strategies