Preparation of Magnetite Nanocomposites based on Azolla Filiculoides fern with Environmental Applications for Organic Pollutants

Biotechnological Journal of Environmental Microbiology

مقاله 2، دوره 1، شماره 2، مهر 2022، صفحه 68-77   

نوع مقاله: Original Article

شناسه دیجیتال (DOI): 10.30495/bioem.2022.703396

نویسندگان

Reyhaneh Kouchakinejad¹؛ Shahab Shariati^{* 2}؛ Jafar Abolhasani¹؛ Ebrahim Ghorbani-Kalhor¹؛ Mohammad Taghi Vardini¹

¹Department of Chemistry, Tabriz Branch, Islamic Azad University, Tabriz, Iran

²Department of Chemistry, Rasht Branch, Islamic Azad University, Rasht, Iran

چکیده

Azolla Filiculoides fern was utilized as a natural adsorbent to develop a magnetic solid phase extraction method for the preconcentration and determination of trace amounts of chlorpyrifos pesticide, which is a primary environmental concern. In this study, the magnetic solid phase extraction (MSPE) method using magnetite-modified azolla nanocomposites (azolla@Fe3O4 NCs) was developed to preconcentrate trace amounts of chlorpyrifos pesticide prior to UV-Vis spectroscopy. The structural characteristics of the synthesized nanocomposites (NCs) were investigated by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), Fourier transform infrared spectroscopy (FT-IR), and vibrating sample magnetometry (VSM) methods. In the proposed MSPE method, after optimizing the adsorption/desorption variables in MSPE and obtaining the optimum level of each variable (adsorption step: Vsample = 50 mL, contact time = 15 min, solution pH = 3, adsorbent mass = 0.05 g, ionic strength = 0.01 mol L-1; desorption step: eluent type and volume = ethanol (2 mL) for 10 min), the desorbed ethanolic solution was spectrophotometrically investigated in the UV-Vis region. The results confirm the developed MSPE method can be used for the preconcentration and determination of trace amounts of chlorpyrifos in the aqueous samples.

کلیدواژه‌ها

Azolla Filiculoides؛ Magnetic solid phase extraction؛ Nanocomposite؛ Pesticide؛ Chlorpyrifos