Functionalization of nanomaterial: applied for environmental remediation

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2017

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Alemdar, Eda

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Environmental pollution is a problem which is threatening living organisms and ecosystem with increasing rate every day. For decades, many studies have been done and experiments have been conducted in order to cure this serious danger. Organic pollutants in general is a big danger especially a group called Persistent Organic Pollutants (POPs) which are mostly originates from industrial and other man made sources are great danger. Among POPs, Polycyclic Aromatic Hydrocarbons (PAHs) are the most common ones. Therefore removal of PAHs from natural environment is a great concern. This study focuses on the synthesis and use of three nanocomposites which are 25% Fe3O4/MWCNT, 40% Fe3O4/MWCNT and 50%Fe3O4 /MWCNT, and then compare the synthesized materials PAH’s removal efficiency with MWCNT and f-MWCNT. Materials used for removal or remediation are varied. Among them Carbon nanotubes (CNTs) are the cheapest and commonly used one. To make them target oriented remediation material, surface activation is performed. Synthesized Fe3O4 nanocomposites were characterized by Transmission Electron Microscopy (TEM), Fourier-Transform Infrared Spectroscopy (FTIR), Vibrating Sample Magnetometer (VSM) and X-Ray Diffraction (XRD) instruments and it was clearly understood that Fe3O4/MWCNT nanocomposites were synthesized successfully. To revelation to the adsorption feature, Gas Chromatography-Mass Spectrometry (GC-MS) was used. . For the GC-MS calibration, naphthalene, acenapthalene, acenapthyne, fluorene, phenantherene and anthracene r2 values are 0,999, 0,998, 0,997, 0,999, 0,999 and 0,998, respectively. According to the results obtained, 40 mg of material was able to adsorb ∑6 PAH with an efficiency of 98% from the solution containing 0.1 ppm PAH in 50 minutes. It has been observed that the purification of the synthesized materials can be easily carried out with the aid of a magnet after adsorption process, because of their great magnetic property.

Subject Keywords

Nanostructured materials., Persistent pollutants., Pollution prevention.

URI

http://etd.lib.metu.edu.tr/upload/12621515/index.pdf
https://hdl.handle.net/11511/26795

Collections

Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

E. Alemdar, “Functionalization of nanomaterial: applied for environmental remediation,” M.S. - Master of Science, Middle East Technical University, 2017.