Since early last century, a large amount of pesticides has been used around the world to eliminate unwanted insects and weeds, especially in crops, in order to achieve greater production. Many pesticides by its complex molecular structure are considered as recalcitrant organic compounds, toxic and bioaccumulative generating cancer and mutations in animals. Various pesticides can not be effectively removed by conventional treatment systems due to its difficult biodegradability. However, organic matter can be high effective degraded using mighty transient species as the hydroxyl radical. In this work some kind of nanoparticles (NPs) were obtained mixing aqueous solutions of iron sulfate (FeSO4) and hydrogen peroxide (H2O2) at pH 3. In these mixtures of Fe (II) ions / H2O2 the presence of NPs was detected with dynamic light scattering (DLS) analysis. By High Resolution Transmission Electron Microscopy (HRTEM) was confirmed the presence of different phases of iron oxide (Fe2O3). The presence of Fe2O3 NPs in these mixtures suggests that Fenton's reagent is a heterogeneous catalyst system and not a homogeneous catalyst system as stated in the literature. On the other hand, the catalytic activity of Fe2O3 NPs was studied in herbicide degradation Basagran 480 at pH 3 under illumination and darkness conditions. Monitoring the degradation process of the herbicide Basagran 480 it was determined by UV-Vis spectrophotometry and Chemical Oxygen Demand (COD). Under illumination condition, the pesticide was 90 % removed.

Degradation of herbicide Basagran 480 with iron oxide nanoparticles

253rd National Meeting (2017)

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.