Microorganism-Plant Combined Bioremediation on Heavy Metal Contaminated Soil In the Industrial District

摘要

Heavy metal contaminated soil problem has already become the global focus. With the increasing attention to the environment protection, scientist began to search new methods for remediation of contaminated soil. This paper mainly studied the effect of microorganism-plant combined bioremediation on contaminated soil in the industrial district, hoping to provide an effective bioremediation technique for heavy metal contaminated soil. In this research, 5 strains which were screened from rhizosphere resistance microorganism combined with Ligustrum quihoui Carr. were used for pot experiments, the results showed that 5 strains all had promotion effect on seedling growth in heavy metal contaminated soil, and high, root, and fresh weight were all higher than that of the control seedling groups. The microorganism-plant combined bioremediation system improved the plant remediation effect to heavy metal Zn, Cd, especially when 5 strains were coexisted and co-actived showed the obvious remediation effect. For Zn, its absorption coefficient was 0.51 and transmission coefficient was 1.55 and for Cd its absorption coefficient was 0.41 and its transmission coefficient was 0.48 when it was under the Zn, Cd combined pollution soil. So it has a good effect of microorganism-plant combined remediation.