The green synthesis of metal oxide nanoparticles is presented as an excellent sustainable alternative for achieving nanostructures, with potential applications. This research provides important information regarding the influence of the type of solvent used in extracting organic reducing agents from E. globulus on the FeO NPs green synthesis protocol. A broad approach to characterization is presented, where UV-vis spectrophotometry suggests the presence of this type of nanoparticulate material. Likewise, the reduction mechanism was evaluated by FT-IR and the magnetic properties were evaluated by PPSM. In addition, characterizations were linked via elemental analysis (EDX), crystallographic characterization (XRD), electron microscopy (SEM/STEM), and Z potential to evaluate colloidal stability. The results show the influence of the type of solvent used for the extraction of organic reducing agents from E. globulus, and the effect on the synthesis of FeO NPs. In addition, the nanostructure material obtained showed excellent efficiency in the remediation of agricultural soil, eliminating metals such as Cr-VI, Cd, and, to a lesser extent, Pb.

Currently, environmental awareness has allowed the development of a growing wave of research focused on the evaluation and remediation of soils. This research was developed in the field of nanotechnology, specifically with the aim of knowing and contributing to the scientific community on the latest advances in the various types of nanoparticles (NP) synthesized by the green route (biosynthesized) and applied to soil remediation, from the analysis of research articles. For this purpose, the PRISMA methodology was used, selecting research between the years 2010 and 2020. As a final result, based on terms of inclusion and exclusion, a total of 20 publications were obtained that contained the necessary variables. The information was indexed in article registration matrices, study characteristics and finally in one of categories.From this, 25% of articles published in 2020 and another 25% of publications in 2018 were found, which indicates that nanotechnology is in constant progress. In the same way, the category matrix addressed various methods for soil decontamination. Finally, it can be concluded that the biosynthesized NP application poses excellent viability, since its application is profitable and does not generate harmful impacts on the environment.