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Updated: Jun 20, 2026

Bioprospecting of Extremophilic Microorganisms to Address Environmental Pollution
Published on: December 30, 2021
[Characteristics of bacteria variation and pollutants behavior in landfill leachate polluted site]
Jun Dong1, Yong-Sheng Zhao, Rong Han
1College of Environment and Resources, Jilin University, Changchun 130026, China. dongjun@jlu.edu.cn
Abstract:
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.
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