[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.
Dong
Jun
J
College of Environment and Resources, Jilin University, Changchun 130026, China. dongjun@jlu.edu.cn
Zhao
Yong-Sheng
YS
Han
Rong
R
Hong
Mei
M
Zhang
Wei-Hong
WH
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