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

doi:10.1016/j.jhazmat.2010.11.116

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^*

^*Corresponding author for this work

Department of Biology

Research output: Contribution to journal › Journal article › peer-review

135 Citations (Scopus)

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+50mgkg^-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.

Original language	English
Pages (from-to)	1206-1217
Number of pages	12
Journal	Journal of Hazardous Materials
Volume	186
Issue number	2-3
DOIs	https://doi.org/10.1016/j.jhazmat.2010.11.116
Publication status	Published - 28 Feb 2011

Scopus Subject Areas

Environmental Engineering
Environmental Chemistry
Waste Management and Disposal
Pollution
Health, Toxicology and Mutagenesis

User-Defined Keywords

Bioavailability of PAHs
Bioremediation
Dissipation of PAHs
Phytoremediation
Soil peroxidase activity

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10.1016/j.jhazmat.2010.11.116

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title = "Enhanced dissipation of PAHs from soil using mycorrhizal ryegrass and PAH-degrading bacteria",

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+50mgkg-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.",

keywords = "Bioavailability of PAHs, Bioremediation, Dissipation of PAHs, Phytoremediation, Soil peroxidase activity",

author = "Yu, {X. Z.} and Wu, {S. C.} and Wu, {F. Y.} and WONG, {Ming Hung}",

note = "Funding Information: The authors thank the Research Grants of the University Grants Committee of Hong Kong (Central Allocation, Group Research, HKBU/03C), and the Mini-AoE (Area of Excellence) Fund from Hong Kong Baptist University for financial support.",

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AU - Yu, X. Z.

AU - Wu, S. C.

AU - Wu, F. Y.

AU - WONG, Ming Hung

N1 - Funding Information: The authors thank the Research Grants of the University Grants Committee of Hong Kong (Central Allocation, Group Research, HKBU/03C), and the Mini-AoE (Area of Excellence) Fund from Hong Kong Baptist University for financial support.

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N2 - 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+50mgkg-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.

AB - 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+50mgkg-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.

KW - Bioavailability of PAHs

KW - Bioremediation

KW - Dissipation of PAHs

KW - Phytoremediation

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ER -

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

Abstract

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