Graduate Thesis on phytostabilization and soil organic matter

Trees planted in contaminated soils provide organic matter, contributing to a reduced mobility of contaminants and the process called “phytostabilization”.

Within the collaboration between IRNAS, CSIC and the University of Seville, Juan Fernando Montero supervised by the RESTECO researcher María T. Domínguez, has presented in July 2018, in the Faculty of Chemistry, the Graduate Thesis titled “Caracterizing fractions of organic carbon in forested soils after the Aznalcóllar mine accident (Guadiamar Green Corridor)”.

In this study, several fractions of soil organic carbon were analyzed, comparing sites under different tree species (white poplar, stone pine and wild olive). The study was repeated in two contrasted areas, with different soil acidity levels.

Using Fourier-transform infrared spectroscopy (FTIR), functional groups were caracterized in samples of soil and litter. The spectra of soil samples differed from those of litter, especially when the soil was neutral to basic, due to the higher intensity of microbial acitivity and litter decomposition in those sites.