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Visible-Light-Induced Photocatalytic Degradation of PAH-Contaminated Soil and Their Pathways by Fe-Doped TiO2 Nanocatalyst

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Abstract

The aim of the present study was to establish the photocatalytic efficiency of Fe-doped TiO2 nanocatalysts toward polycyclic aromatic hydrocarbons (PAHs), which were phenanthrene, anthracene, and fluoranthene, contaminated soil under visible irradiation. The morphology, phase, and particle size of the prepared nanocatalyst have been studied as a first mention in literature. The photoresponse of the TiO2 extends from UV region to the visible region was proved by the diffuse reflectance spectrophotometry (DRS). The surface area is greatly increased though the Fe-doped TiO2 compared with the bare TiO2. The pH value of the media showed the beneficial to PAH absorption on the Fe-doped TiO2 under the alkaline condition due to the surface catalyst possesses much negative charge, which is increase in percentage of PAH degradation. Based on GC-MS study, the mechanism of photoactivity of the selected PAHs involves hydroxylation, ring opening, and rearrangement reactions. The main intermediates of PAH photodegradation were found to be 9-octadecanoic acid, heptadecane, octadecane, cyclohexane (1-hexadecylheptadecyl), and 15-hydroxypentadecanoic acid.

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Funding

This received a financial support from the Research, Development and Engineering (RD&E) fund through The National Nanotechnology Center (NANOTEC), The National Science and Technology Development Agency (NSTDA), Thailand (P-12-00165), to Nakhon Sawan Rajabhat University.

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Authors and Affiliations

  1. Chemistry Program, Faculty of Science and Technology, Rajabhat Nakhon Sawan University, Nakhon Sawan, 60000, Thailand

    Chonlada Dechakiatkrai Theerakarunwong

  2. Material Science Research Center, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand

    Sukon Phanichphant

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  1. Chonlada Dechakiatkrai Theerakarunwong
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  2. Sukon Phanichphant
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Correspondence to Chonlada Dechakiatkrai Theerakarunwong.

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Theerakarunwong, C.D., Phanichphant, S. Visible-Light-Induced Photocatalytic Degradation of PAH-Contaminated Soil and Their Pathways by Fe-Doped TiO2 Nanocatalyst. Water Air Soil Pollut 229, 291 (2018). https://doi.org/10.1007/s11270-018-3951-6

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  • DOI: https://doi.org/10.1007/s11270-018-3951-6

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