NDLI: Characterization of landfill leachates and studies on heavy metal removal

Content Provider	Royal Society of Chemistry (RSC)
Author	Gürsoy, Gül Çeçen, Ferhan
Copyright Year	2000
Abstract	This study covers a thorough characterisation of landfill leachates emerging from a sanitary landfill area. The landfill leachates were obtained in the acidic stage of landfill stabilisation. Their organic content was high as reflected by the high BOD5 (5 day biological oxygen demand) and COD (chemical oxygen demand) values. They were also highly polluted in terms of the parameters TKN (total Kjeldahl nitrogen), NH4-N, alkalinity, hardness and heavy metals. Nickel was present in these wastewaters at a significant concentration. With regard to the high heavy metal content of these wastewaters, several physicochemical removal alternatives for the heavy metals Cu, Pb, Zn, Ni, Cd, Cr, Mn and Fe were tested using coagulation, flocculation, precipitation, base addition and aeration. Additionally, COD removal and ammonia stripping were examined. Co-precipitation with either alum or iron salts did not usually lead to significantly higher heavy metal removal than lime alone. The major methods leading to an effective heavy metal removal were aeration and lime addition. Nickel and cadmium seemed to be strongly complexed and were not removed by any method. Also lead removal proved to be difficult. The results are also discussed in terms of compliance with standards.
Starting Page	436
Ending Page	442
Page Count	7
File Format	HTM / HTML PDF
ISSN	14640325
Volume Number	2
Issue Number	5
Journal	Journal of Environmental Monitoring
DOI	10.1039/b004729p
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Cu Landfill Biochemical oxygen demand Chemical oxygen demand Kjeldahl method Alkalinity Hard water Heavy metals Lead Flocculation Ammonia Calcium carbonate Cadmium
Content Type	Text
Resource Type	Article
Subject	Public Health, Environmental and Occupational Health Management, Monitoring, Policy and Law

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Comparison of BOD results obtained by dilution and manometric methods in sanitary landfill leachates

Removal of chemical oxygen demand, nitrogen, and heavy metals using a sequenced anaerobic-aerobic treatment of landfill leachates at 10–30°C

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