ORIGINAL RESEARCH
In situ Bioremediation of Heavy Metals
in Contaminated Soil Using Microbial Agents
and Planting Experiments
Qiwei Zhan1,2, Chunxiang Qian1,2, Mingming Wang1,2
More details
Hide details
1School of Materials Science and Engineering,
2Research Institute of Green Construction Materials,
Southeast University, Jiulonghu Campus, Nanjing 211189, P.R. China
Submission date: 2014-11-25
Final revision date: 2015-01-20
Acceptance date: 2015-01-27
Publication date: 2015-05-20
Pol. J. Environ. Stud. 2015;24(3):1395-1400
KEYWORDS
TOPICS
ABSTRACT
In this paper, two kinds of microbial agents – carbonate-microbe agents (CMA) and phosphate-microbe
agents (PMA) – were used to remedy heavy metals in contaminated soil. Contrastive analysis of the remedying
effects by CMA and PMA was obtained. Meanwhile, green vegetable cultivation and a vegetable transplanting
experiment were conducted in contaminated soil that had been remedied by two kinds of microbial
agents. The planting experiment clearly contributed to analysis of the remedying effect. The experimental
results indicated that two kinds of microbial agents had a remarkable remedying effect on the heavy metals;
the remedying effect of Cr2+ and Pb2+ by CMA was better compared with PMA, while the remedying effect of
Cd2+ and Zn2+ by PMA was better than CMA, and the remedying effect of Cu2+ was almost equally good by
two kinds of microbial agents. Bud rate and growth momentum improved significantly in contaminated soil
after remediation, the concentration of heavy metals in seedlings and vegetables was reduced greatly, and several
heavy metals indices were lower than the national standards. For different heavy metals pollution, different
microbial agents should be used: namely the CMA are suitable for remedying Cr2+ and Pb2+, whereas PMA
are suitable for remedying Cd2+ and Zn2+.