Enhanced dissipation of PAHs from soil using mycorrhizal ryegrass and PAH-degrading bacteria

X.Z. YU, S.C. WU, F.Y. WU, Ming Hung WONG

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Abstract

The major aim of this experiment was to test the effects of a multi-component bioremediation system consisting of ryegrass (Lolium multiflorum), polycyclic aromatic hydrocarbons (PAHs)-degrading bacteria (Acinetobacter sp.), and arbuscular mycorrhizal fungi (Glomus mosseae) for cleaning up PAHs contaminated soil. Higher dissipation rates were observed in combination treatments: i.e., bacteria + ryegrass (BR), mycorrhizae + ryegrass (MR), and bacteria + mycorrhizae + ryegrass (BMR); than bacteria (B) and ryegrass (R) alone. The growth of ryegrass significantly (p < 0.05) increased soil peroxidase activities, leading to enhanced dissipation of phenanthrene (PHE) and pyrene (PYR) from soil. Interactions between ryegrass with the two microbes further enhanced the dissipation of PHE and PYR. Mycorrhizal ryegrass (MR) significantly enhanced the dissipation of PYR from soil, PYR accumulation by ryegrass roots and soil peroxidase activities under lower PHE and PYR levels (0 and 50 + 50 mg kg−1). The present results highlighted the contribution of mycorrhiza and PAH-degrading bacteria in phytoremediation of PAH contaminated soil, however more detailed studies are needed. Copyright © 2010 Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)1206-1217
JournalJournal of Hazardous Materials
Volume186
Issue number2-3
DOIs
Publication statusPublished - Feb 2011

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Lolium
Polycyclic Aromatic Hydrocarbons
Polycyclic aromatic hydrocarbons
pyrene
Pyrene
dissipation
Bacteria
PAH
Soil
mycorrhiza
Soils
phenanthrene
bacterium
Mycorrhizae
soil
Peroxidase
Environmental Biodegradation
phytoremediation
Bioremediation
bioremediation

Citation

Yu, X. Z., Wu, S. C., Wu, F. Y., & Wong, M. H. (2011). Enhanced dissipation of PAHs from soil using mycorrhizal ryegrass and PAH-degrading bacteria. Journal of Hazardous Materials, 186(2-3), 1206-1217. doi: 10.1016/j.jhazmat.2010.11.116

Keywords

  • Bioremediation
  • Phytoremediation
  • Dissipation of PAHs
  • Bioavailability of PAHs
  • Soil peroxidase activity