[Characteristics of bacteria variation and pollutants behavior in landfill leachate polluted site].
Static and dynamic simulated experiments were conducted to investigate the characteristics of bacterial variation in landfill leachate polluted site, and relations between attenuation, species-distribution, bioavailability of pollutants and bacterial activity. Results indicated that bacterial activity in soil and fine sand showed a trend of increase first and then decreased with time; the increase rate was up to 0.081 d(-1) and 0.022 d(-1) at the increasing stage,and the decrease rate reached 0.0095 d(-1) and 0.005 1 d(-1) at the decreasing stage, respectively. A clear correlation between attenuation of COD and variation of bacterial activity with time was shown; the removal efficiency of COD in soil was about 30% higher than that in fine sand, and the attenuation rate of COD was 500 mg/d in fine sand approximately. There was no clear correlation between ammonium-nitrogen attenuation and bacterial activity in short-term with time. Variation of heavy metals species and bioavailability was related to their properties, redox environment, and other factors.
College of Environment and Resources, Jilin University, Changchun 130026, China. dongjun@jlu.edu.cn
Jun
J
Dong
Yong-Sheng
YS
Zhao
Rong
R
Han
Mei
M
Hong
Wei-Hong
WH
Zhang
D001419:Bacteria / Q000378:metabolism*; D001673:Biodegradation, Environmental; D019216:Metals, Heavy / Q000302:isolation & purification* / Q000378:metabolism; D009584:Nitrogen / Q000378:metabolism; D010084:Oxidation-Reduction; D012037:Refuse Disposal / Q000379:methods*; D012988:Soil Microbiology; D012989:Soil Pollutants / Q000032:analysis* / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000032:analysis*
D019216:Metals, Heavy; D012989:Soil Pollutants; D014874:Water Pollutants, Chemical; D009584:Nitrogen