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蚯蚓生物积累表征土壤中芘的生物有效性研究

Keywords: 土壤,,生物有效性,蚯蚓-土壤积累因子

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Abstract:

利用蚯蚓作为测试生物,引入蚯蚓-土壤积累因子(Earthworm-SoilAccumulationFactor,ESAF),就不同土壤中芘对蚯蚓的生物有效性进行了考察和研究。试验结果表明,蚯蚓在土壤中培养10d,体内积累芘的浓度达到平衡,积累浓度与土壤初始染毒浓度成显著正相关;土壤性质对土壤中芘的生物有效性具有非常重要的影响,土壤有机质、粘土矿含量越高,对芘的吸持能力越强,ESAF越小。

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