Activation of Lead (Pb) in Soil by Bacteria
Adding a certain concentration of Pb2+ to the culture medium. Two strong lead-resistant strains of microorganisms labeled as J13 and Y7, were selected from six soil samples, J13 and Y7 belongs to Erwinia sp. and Bacillus respectively through preliminary identification. J13 and Y7 were inoculated into culture medium which added with PbCO3 and carried out activation test of lead in precipitation fraction on sample Ⅱ. The results showed that the content of lead in active fraction of culture medium was more than that of sample Ⅱ. The available lead content in J13 and Y7 culture medium were 1.809mg L-1 and 1.513mg L-1 respectively, 1.022mg kg-1 and 0.996mg kg-1 in sampleⅡ respectively. This may be related to adsorption of part of Pb2+ by Soils; Meanwhile, both of the pH value decreases with the increase of Pb2+ content. It indicated that the activation efficiency of bacterial strain J13and Y7 correlated to their ability to produce acid.
heavy metal pollution lead bacteria screening activation
Xu-mei WANG Hong-qi WANG Xu-mei WANG Nan SHENG Xiu-chun TONG Yinyin GENG
College of Water Sciences Beijing Normal University Beijing,China,100875 College of Resource and Environment Northeast Agricultural University Harbin,China,150030
国际会议
北京
英文
1-3
2009-06-11（万方平台首次上网日期，不代表论文的发表时间）