Abstract:

he mechanism of EDCs adsorption enhanced by magnetite spiked in soils (the magnetiteimmobilized soils) was qualitatively analyzed by FTIR. The results indicate that the thermodynamic process conforms with Langmuir isotherm very well, and the adsorption of EDCs onto the magnetiteimmobilized soils was the result of both surface adsorption and distribution. With the increase of the doping ratio of magnetite, the adsorption capacity of the magnetitesoil for EDCs was increased. The removal rate of E2 and BPA suggested  that magnetite spiked had a significant enhancement for adsorption and removal
of EDCs. After twice desorption, the desorption rate of E2 and  BPA showed the magnetiteimmobilized soils had a good retention capacity for E2. It was found from the FTIR profile that the appearance of hydrogen bonds between the magnetiteimmobilized soils on the one hand and EDCs on the other, and EDCs molecule themselves was one of the most important factors affecting the EDCs adsorption.

Key words: endocrine disrupting compounds, magnetite, soil, retention/mobilization, infrared spectroscopy