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苏丹草对土壤中菲芘的修复作用

Keywords: 植物修复,多环芳烃,,,土壤,苏丹草,土壤酶

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Abstract:

采用盆栽试验法,研究了苏丹草对土壤中菲、芘的去除效果,及植物和微生物在去除土壤菲、芘中的交互效应。结果显示,在试验浓度范围(0~322.06mg·kg-1)内,土壤-苏丹草系统(TR3)对菲、芘的去除效果明显。种植苏丹草60d后,土壤菲、芘去除率分别为73.07%~83.92%、63%~77.62%;平均去除率分别比对照1(无植物,不加0.1%NaN3)高55.58%、50.71%,比对照2(无植物,加0.1%NaN3)高72.71%、66.57%,说明种植苏丹草可以促进微生物对土壤中芘、菲降解。土壤酶活性测定结果也显示,酶活性越高,污染物降解率越高,反之亦然。因此,植物-微生物间的交互效应是土壤中多环芳烃降解的主要途径。

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