NDLI: Irrigation of Soil with Synthetic Landfill Leachate – Breakthrough Behaviour of Selected Pollutants

Content Provider	Springer Nature Link
Author	Smith, Dorothea C. Senior, Eric Dicks, Harvey M.
Copyright Year	1999
Abstract	A leaching column experiment was conducted to investigate the feasibility of soil irrigation with landfill leachate as a decontamination technology. A loamy sand was irrigated with synthetic landfill leachates with and without phenol, zinc and copper and combinations thereof. Irrigation was applied at a rate of one pore volume twice per week for 18 weeks, equivalent to a total application of 1165 mm. Electrical conductivity in all column effluents was lower than in the influent solutions. Changes in effluent pH with increasing numbers of pore volume displacements were influenced by the presence of zinc and phenol and could be adequately modelled using cubic response functions. Copper was totally removed from the leachates by passage through the soil as was zinc during the first few pore volume displacements. Later, however, zinc was detected in the column effluents in concentrations close to or greater than those of the influent solutions. In the presence of phenol zinc mobility was enhanced. Zinc response to number of pore volume displacements was effectively represented by Gompertz functions. The phenol concentrations of the leachates were reduced by 30 to 50% by passage through the soil columns. The results demonstrated that removal of pollutants from landfill leachates by passage through a soil with a low attenuation potential was moderate to high. Therefore, soil irrigation with landfill leachate may be an effective purification technique provided that it is practised with caution, and consideration is given to soil and leachate properties.
Starting Page	327
Ending Page	342
Page Count	16
File Format	PDF
ISSN	00496979
Journal	Water, Air, and Soil Pollution
Volume Number	109
Issue Number	1-4
e-ISSN	15732932
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	1999-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Hydrogeology Atmospheric Protection/Air Quality Control/Air Pollution
Content Type	Text
Resource Type	Article
Subject	Ecological Modeling Environmental Chemistry Pollution Environmental Engineering Water Science and Technology

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