**5. Conclusions**

The new trends in the restoration of degraded soils, wastewater and even leachates generated from urban waste include phyto-management as part of a Circular Economy model which is an attractive and viable alternative that is already being explored by different companies; it is based on the principles of preservation and optimization of natural resources, as well as improving the efficiency of production systems by eliminating or reducing environmental contaminants. Therefore, phytoremediation can be considered a circular economy strategy because it aims to reduce both the entry of materials and the production of waste.

In different matrices water, soil, air there are inorganic contaminants which include trace elements that are essential for the growth and development of plants, heavy metals and some non-metallic elements such as As and B are also included. Toxicity varies according to many factors, such as the chemical form of the elements, concentration, persistence among other factors, some compounds can be transformed to their less toxic forms such as Cr. *Chrysopogon zizanioides* is a hyper-accumulator species with a sometimes unpleasant appearance and its growth capacity makes it ideal for phytoremediation.

Based on group experience we know that this species can survive, tolerate, absorb and transform. Also based on the literature we know that there must be periods of acclimatization of the species for its transformation and or ideal absorption of the compounds. Due to previous knowledge about the phytoremediation process, which is an integral methodology where at the same time the species phytovolatilizes, rhizofiltration, phytodegrades. Due to the characteristics of the species, it can be a permeable membrane to prevent or sequester toxic elements to the water table, but thanks to the life cycle of this species it can absorb significantly contaminated by its modular growth. However, dead leaves may contain some compounds that cannot be degraded and these should be confined or incinerated to ensure that they do not return to the soil.

The essential oil extracted from vetiver roots can be used in the perfume industry, vetiver leaves can be used for roofing of rustic houses and the plant is already used as a fire barrier because it keeps growing even after being burned. In addition, the use of vetiver has the purpose of improving the management of degraded spaces and their restoration through innovative phytoremediation techniques. Vetiver could be used in many countries throughout the world due to its economical accessibility and ability to adapt to different climatic conditions, as well as its capacity to remove different types of pollutants as has already been evidenced.
