School of Information and Engineering, Jiangxi Agricultural University, Nanchang 330045, China.
School of Materials Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen 333403, China.
J Hazard Mater. 2015 Mar 21;285:535-41. doi: 10.1016/j.jhazmat.2014.07.021. Epub 2014 Jul 19.
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.
进行了一项为期 120 天的实验，以研究由高羊茅（Festuca arundinacea）、丛枝菌根真菌（AMF）（Glomus caledoniun L.）和表土蚯蚓（Eisenia foetida）组成的多组分生物修复系统对多环芳烃（PAHs）污染土壤的修复效果。接种 AMF 和/或蚯蚓增加了植物的产量和植物对 PAH 的积累。然而，高羊茅对 PAH 的吸收在土壤 PAH 的去除中仅占很小的一部分。丛枝菌根高羊茅显著增强了土壤中 PAH 的消散、PAH 降解菌密度和多酚氧化酶活性。在 AMF+蚯蚓+高羊茅的组合处理中，观察到最高的 PAH 消散率（93.4%），土壤中 PAH 浓度从初始的 620 毫克/千克降至 120 天的 41 毫克/千克。这一浓度低于中国住宅用地 PAH 质量（45 毫克/千克干重）所需的阈值水平。
