[Contaminants natural attenuation of beitiantang landfills leachate polluted sites].
Redox zones and the natural attenuation of pollutants in landfill leachate polluted site through analyzing data monitored around the Beitiantang Landfills of Beijing City. The results indicated that redox zones existed in Beitiantang Landfill leachate polluted sites, and 5redox zones were classified depended on distribution rules and characteristics of indicative substrates, namely methanogenic zone, sulfate reduction zone, iron reduction zone, nitrate reduction zone and oxygen reduction zone. Attenuation efficiencies of different organic contaminants in redox zones were different. Content of volatile hydroxybenzene and cyanide in sulfate reduction zone were relative high, and they were 0.005 and 0.019 microg/L, respectively. Heavy metal content, such as Cr, Pb, Ni, As, Cu, Cd, Zn and Mn were relative high in methanogenic zone, and they were 25.11, 33.82, 29.93, 3.18, 2.3, 0.1, 283.1, 1220 microg/L, respectively. Therefore, redox zones played an important role on the attenuation of pollutants.
Dong
Jun
J
College of Environment and Resources, Jilin University, Changchun 130026, China. dongjun@jlu.edu.cn
Zhao
Yong-Sheng
YS
Wang
Yi-Hong
YH
Chen
Zhong-Rong
ZR
Hong
Mei
M
D002681:China; D004785:Environmental Pollutants / Q000032:analysis*; D019216:Metals, Heavy / Q000032:analysis*; D008697:Methane / Q000032:analysis; D010084:Oxidation-Reduction; D012037:Refuse Disposal / Q000379:methods*
D004785:Environmental Pollutants; D019216:Metals, Heavy; D008697:Methane