土壤中耐铅微生物的筛选

通过在培养基中加入一定浓度的Pb(300mg／kg),从土壤中分离到12株耐Pb微生物菌株。其中细菌菌株为1～5号,放线菌为6～9号,真菌为10～12号。经过形态学观察、拮抗试验以及液体培养和土壤模拟试验中降低Pb效果测试,发现12株菌对有效态铅都有一定的降低作用。在液体培养中3号、4号、6号、7号、8号和10号菌株的降低效果最好,降低率超过70％,在土壤培养中3号和7号的降低作用最明显,降低率分别为63．8％和66％。

Selection of lead-resistant strains of microorganisms from soil

Twelve very strong lead-resistant strains of microbes were isolated from soil through adding a definite concentration of Pb (300mg/kg) in the medium. No.1 to No.5 strains were bacteria, No.6 to No.9 were actinomyces and No.10 to No.12 were fungi.Through observation on their microcosmic morphology,antagonizing test and simulated Pb-removing experiments of lead-contaminated liquid and soil by these bacterium, it is found that twelve resistant strains of microbe are effective in lead-reducing.The lead-reducing effects of No.3,No.4,No.6,No.7,No.8 and No. 10 are higher in liquid test,the reducing rate can reach more than 70% ;the effects of No.3 and No.7 are higher in soil, the reducing rate can reach 63.8% and 66%,respectively.