The use of acid insoluble residue to correct for the presence of soil-derived metals in the gut of earthworms used as bio-indicator organisms

E.A. Stafford , S.P. McGrath
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引用次数: 24

Abstract

The use of acid insoluble residue (AIR) as a marker fraction in the soil is proposed for correcting measurements of the heavy metals: Zn, Cu, Cd and Pb in earthworm samples to eliminate the contribution from soil in the earthworm gut. Five species of earthworm were kept for 15 days on four experimental soils which contained different levels of Zn, Cu, Cd and Pb. Results of heavy metal concentrations in earthworm tissue obtained after calculation using the correction based on AIR content were compared statistically with results obtained by other methods. In the majority of soil/earthworm combinations no significant difference emerged between the calculated results and those obtained after dissection of earthworm samples, suggesting that the correction using AIR content provides a suitable method for estimating levels of heavy metals present in earthworm tissue.

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使用酸不溶性残留物来纠正蚯蚓肠道中土壤衍生金属的存在,作为生物指示生物
提出利用土壤中的酸不溶性残留物(AIR)作为土壤中重金属Zn、Cu、Cd和Pb的标记分数,校正蚯蚓样品中重金属Zn、Cu、Cd和Pb的测量,以消除蚯蚓肠道中土壤的贡献。5种蚯蚓在4种不同Zn、Cu、Cd、Pb含量的试验土壤上饲养15 d。采用AIR含量校正计算得到的蚯蚓组织重金属浓度与其他方法计算结果进行了统计比较。在大多数土壤/蚯蚓组合中,计算结果与解剖蚯蚓样品后得到的结果之间没有显著差异,这表明使用AIR含量进行校正是估计蚯蚓组织中重金属含量的合适方法。
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