College of Resources and Environment, National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer, Key Laboratory of Colleges and Universities in Shandong Province Agricultural Environment, Shandong Agricultural University, Taian, 271018, China.
The Fifth Prospecting Team of Shandong Coal Geology Bureau, Taian, 271010, China.
Environ Sci Pollut Res Int. 2017 Sep;24(27):22073-22081. doi: 10.1007/s11356-017-9776-9. Epub 2017 Aug 8.
Perfluorooctanoic acid (PFOA) is considered a persistent environmental pollutant. The aim of this study was to assess the potential toxicity of PFOA to earthworms (Eisenia fetida) in artificial soil. The activities of superoxide dismutase (SOD), catalase (CAT), peroxidase (POD), and glutathione S-transferase (GST) as well as the contents of malondialdehyde (MDA) were measured after exposure to 0, 5, 10, 20, and 40 mg kg PFOA in soils for 7, 14, 21, and 28 days. The results showed that SOD activity increased at 14 days and decreased from 21 to 28 days; MDA levels were highest in the treatment with 40 mg kg PFOA after 28 days of exposure. In contrast, CAT and POD activities increased after 14-21 days of exposure and significantly decreased with long-term exposure (28 days). GST activity increased significantly from 14 to 28 days. Our results indicate that PFOA has biochemical effects on E. fetida, thereby contributing to our understanding of the ecological toxicity of PFOA on soil invertebrates.
全氟辛酸（PFOA）被认为是一种持久性环境污染物。本研究旨在评估 PFOA 对人工土壤中赤子爱胜蚓（Eisenia fetida）的潜在毒性。在暴露于 0、5、10、20 和 40mg/kg PFOA 的土壤中 7、14、21 和 28 天后，测量了超氧化物歧化酶（SOD）、过氧化氢酶（CAT）、过氧化物酶（POD）和谷胱甘肽 S-转移酶（GST）的活性以及丙二醛（MDA）的含量。结果表明，SOD 活性在 14 天增加，在 21-28 天下降；暴露 28 天后，40mg/kg PFOA 处理组的 MDA 水平最高。相比之下，CAT 和 POD 活性在暴露 14-21 天后增加，并随着长期暴露（28 天）而显著下降。GST 活性从 14 天到 28 天显著增加。我们的结果表明，PFOA 对赤子爱胜蚓具有生化影响，从而有助于我们了解 PFOA 对土壤无脊椎动物的生态毒性。
