Bioremediation of PCBs-contaminated Soil using Halophilic Bacteria

This experiment extracted a halophilic bacteria from the deep sea-bed mud to carry out bioremediation of PCB-contaminated soil under different nitrogen source, permeability, humidity, temperature and salinity. The experimental results showed that during the 20-day soil natural bioremediation, there were little change in the concentration of PCB 1260. The PCBs degradation rate was 26.03% in 20d when the soil water content was 60% of field capacity, room temperature, beef extract 0.5g.kg(-1), standing, soil salinity 0.2g.kg(-1). When the soil temperature increased to 30 C, the PCBs degradation rate was up to 89.21%. After submerging treatment, the degradation rate was 19.45% in 20d. Adding nitrogen-contained nutrition and proper soil stirring aided the growth of B2.6, enhanced the metabolic activities of indigenous microorganisms, and accelerated the natural degradation of soil PCBs. The PCBs degradation rate was up to 38.97% when the soil salinity was lg. kg(-1).