Abstract
The key issue in the efficient electromedical sensor to detect trace of heavy metal ions is to design hierarchical nanostructure with high sensitivity and low detection limit. The aim of the study was to synthesize nano zero valent iron (NZVI) particles in the presence of yerba-mate tea extracts, which was employed as a reducing and capping agent, while ferric chloride hexahydrate (FeCl3.6H2O) or ferrous sulphate heptahydrate (FeSO4.7H2O) was used as iron source. The synthesis parameters such as residence time and temperature were investigated. Additionally, the synthesized NZVI particles were used to fabricate a sensor to detect trace of Cr6+ and Pb2+ ions in wastewater by electrochemical impedance spectroscopy (EIS). Green synthesis was employed based on its ability to eliminate the use of toxic chemicals, such as sodium borohydride (NaBH4), which was previously utilized during the synthesis of NZVI particles...
M.Tech. (Chemical Engineering)