Impact of Four Plant Species and Arbuscular Mycorrhizal (AM) Fungi on Polycyclic Aromatic Hydrocarbon (PAH) Dissipation in Spiked Soil
Xiaobai Zhou1,2, Jiti Zhou1, Xuemin Xiang1, Aurélie Cébron2, Thierry Béguiristain2, Corinne Leyval2
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1School of Environmental Science and Technology, Dalian University of Technology,
Linggong Road, Dalian 116024, P.R. China
2LIMOS, Nancy University, CNRS, BP 70239, 54506 Vandoeuvre-les-Nancy Cedex, France
Pol. J. Environ. Stud. 2013;22(4):1239-1245
Alfalfa, tall fescue, ryegrass, and celery, some of which were inoculated with the AM fungus Glomus intraradices, were compared for their contributions to phenanthrene (PHE), pyrene (PYR), and dibenzo( a,h)anthracene (DBA) dissipation in spiked soil. A pot experiment was conducted in which PAHs extracted from soil and plant, quantity of PAH degraders, and plant biomass were evaluated. The results showed that biodegradation was the dominant removal mechanism for PAHs from soil while PAH accumulation in the plant tissue was negligible. PAH dissipation varied with the plant species and decreased with the increase of PAH molecular weight. The four plant species displayed a positive effect on PHE dissipation, and alfalfa improved PYR and DBA dissipation. AM fungi significantly increased plant biomass, phosphorus uptake, and PHE removal rate in planted treatments. Plant biomass and PAH degraders showed a weak linear relationship with PAH dissipation, indicating that there might be other important factors influencing PAH dissipation.
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