Instituto de Desarrollo Tecnológico para la Industria Química (INTEC, UNL-CONICET), 3000, Santa Fe, Argentina.
Departamento de Ciencias Naturales, FHUC-UNL, Ciudad Universitaria, 3000, Santa Fe, Argentina.
Environ Sci Pollut Res Int. 2020 Jul;27(21):27023-27031. doi: 10.1007/s11356-020-09002-w. Epub 2020 May 8.
In this work, earthworm effect on the efficiency of biobeds for glyphosate degradation was studied. Three biomixtures with and without the addition of earthworms (Eisenia fetida species) were evaluated. The initial concentration of glyphosate was 1000 mg/kg biomixture. Glyphosate and biological parameters were measured as a function of time. Earthworm survival, biomass, and reproduction were evaluated as well. All biomixtures that contain earthworms reached 90% of glyphosate degradation at 90 days in comparison with the biomixtures without earthworms that reached 80% approximately at the same time. Also, within the biomixtures that contained earthworms, glyphosate degradation rate was significantly higher in the one made up with soil and wheat stubble (Ws-E) showing excellent capacity for aminomethylphosphonic acid (AMPA) degradation, the main metabolite of glyphosate degradation. In addition, a study performed after the vermiremediation process showed that E. fetida can tolerate high glyphosate concentration without modifications in its life traits. It can be concluded that the use of E. fetida within the biobeds is an excellent combination to improve glyphosate and AMPA removal.
本工作研究了蚯蚓对生物床中草甘膦降解效率的影响。评估了三种含有和不含有蚯蚓（赤子爱胜蚓）的生物混合物。草甘膦的初始浓度为 1000mg/kg 生物混合物。随着时间的推移测量了草甘膦和生物参数。还评估了蚯蚓的存活率、生物量和繁殖情况。与不含蚯蚓的生物混合物相比，所有含有蚯蚓的生物混合物在 90 天内达到了 90%的草甘膦降解，而不含蚯蚓的生物混合物在同一时间内达到了大约 80%。此外，在含有蚯蚓的生物混合物中，由土壤和麦茬组成的生物混合物（Ws-E）的草甘膦降解速率显著更高，显示出对草甘膦降解的主要代谢物氨甲基膦酸（AMPA）的优异降解能力。此外，在蚯蚓修复过程后进行的一项研究表明，赤子爱胜蚓可以在不改变其生活特征的情况下耐受高浓度的草甘膦。可以得出结论，在生物床中使用赤子爱胜蚓是提高草甘膦和 AMPA 去除率的绝佳组合。
