Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 285, Issue -, Pages 535-541Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2014.07.021
Keywords
Phytoremediation; AMF; Polyphenol oxidase; qPCR
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Funding
- National Natural Science Foundation of China [41102231]
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A 120-day experiment was performed to investigate the effect of a multi-component bioremediation system consisting of tall fescue (Festuca arundinacea), arbuscular mycorrhizal fungus (AMF) (Glomus caledoniun L.), and epigeic earthworms (Eisenia foetida) for cleaning up polycyclic aromatic hydrocarbons (PAHs)-contaminated soil. Inoculation with AMF and/or earthworms increased plant yield and PAH accumulation in plants. However, PAH uptake by tall fescue accounted for a negligible portion of soil PAH removal. Mycorrhizal tall fescue significantly enhanced PAH dissipation, PAH degrader density and polyphenol oxidase activity in soil. The highest PAH dissipation (93.4%) was observed in the combination treatment: i.e., AMF+ earthworms +tall fescue, in which the soil PAH concentration decreased from an initial value of 620 to 41 mg kg(-1) in 120 days. This concentration is below the threshold level required for Chinese soil PAH quality (45 mg kg(-1) dry weight) for residential use. (C) 2014 Elsevier B.V. All rights reserved.
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