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Immobilization of introduced bacteria and degradation of pyrene and benzo(α)pyrene in soil by immobilized bacteria

WANG Xin1,2; LI Peijun3;SONG Shouzhi1;ZHONG Yong1;ZHANG Hui1;E.V.Verkhozina4   

  1. 1College of Resources and Civil Engineering, Northeastern University, Shenyang 110004, China;
    2School of Science, Shenyang University of Technology , Shenyang 110023, China;
    3Institute of Applied Ecology,Chinese Academy of Sciences, Shenyang 110016, China;
    4Institute of Earth Crust, Siberian Branch of Russian Academy of Science, Irkutsk 664033, Russia
  • Received:2006-03-23 Revised:2006-09-15 Online:2006-11-18 Published:2006-11-18

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Abstract: In this study, introduced bacteria were applied in the bioremediation of pyrene and benzo(α)pyrene in organic pollutants-contaminated soils, aimed to test whether it was feasible to introduce bacteria to environmental engineering. Three introduced bacteria were immobilized separately or together to degrade the pyrene and benzo(α)pyrene in soil, taking dissociated bacteria as the control, and comparing with three indigenous bacteria. The results showed that immobilized introduced bacteria, either single or mixed, had higher degradation efficiency than dissociated bacteria. Compared with indigenous bacteria, some introduced bacteria had predominance to some degree. The introduced bacteria-mixture had better degradation efficiency after being immobilized. The degradation rate of pyrene and benzo(α)pyrene after treated with immobilized bacteria-(B61-B67)-mixture for 96 hours was 43.49% and 38.55%, respectively.

Key words: Ecosystem productivity, Process model, Landscape scale, Remote sensing data, Surface data, Net primary productivity, Changbai Mountain Natural Reserve