ABSTRACT

Vermiremediation is considered as an evolving environmental friendly and sustainable technology. It serves as an additional parallel factor in increasing overall efficiency of bio-methods. Vermiremediation treat soils contaminated with inorganic and organic chemicals through different direct actions like bioaccumulation of chemical contaminants and indirect action like using vermicast of earthworm to bioadsorb the chemical contaminants etc. Vermiremediation excels other bio-conversion technologies since the organics such as PAHs and TPH that otherwise cannot be utilized by others, can be utilized by this technology. This includes about 100–1000 times greater value enhancement as compared to other biological technologies. Limitations of vermiremediation include, earthworms’ applicability only to less toxic soil, and to the certain depths (epigeic (0.1–0.3 m), anecic (3 m), endogeic (0.2 m)) of the soil, sensitive to any change in environmental conditions etc. This review is aimed to provide the summary of previous investigations showing the potential of Eisenia fetida an earthworm species in remediating the oil-contaminated soil. Several lab experiments have been conducted in this regard. Potentials and limitations of earthworms particularly Eisenia fetida and strategies to overcome those limitations have been discussed. It is recommended that in the future further studies are required, to comprehend the processes involved in vermiremediation and to evaluate the potential side effects of the measurements taken to enhance the vermiremediation process. Moreover, understanding organic contaminants behavior in drilosphere, methods for collecting earthworm in the contaminated soil and their disposal after harvesting is also needed.

摘要

Vermiremediation 被认为是一种不断发展的环境友好和可持续技术。它在提高生物方法的整体效率方面是一个额外的平行因素。Vermiremediation 通过不同的直接作用（如化学污染物的生物积累）和间接作用（如使用蚯蚓的蠕虫生物吸附化学污染物等）来处理被无机和有机化学品污染的土壤。 Vermiremediation 优于其他生物转化技术，因为有机物如 PAHs 和 TPH不能被别人利用，可以被这个技术利用。与其他生物技术相比，这包括大约 100-1000 倍的价值提升。蚯蚓修复的局限性包括蚯蚓仅适用于毒性较小的土壤，Eisenia fetida一种蚯蚓，用于修复受石油污染的土壤。在这方面已经进行了几个实验室实验。已经讨论了蚯蚓的潜力和局限性，特别是Eisenia fetida以及克服这些局限性的策略。建议在未来需要进一步的研究，以了解与驱虫相关的过程，并评估为加强驱虫过程而采取的措施的潜在副作用。此外，还需要了解干流圈中有机污染物的行为，在污染土壤中收集蚯蚓的方法以及收获后的处理方法。