Oxidative Photodegradation of Pyrene and Fluoranthene by Fe-Based and Zn-Based Fenton Reagents
| Autor: | Mahtab Ahmad, Abid Hussain, Fahad N. Al-Barakah, Muhammad Waqar, Mohamed H. EL-Saeid, Mohamed Al-Sewailem |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Fluoranthene
Pollutant 021110 strategic defence & security studies Waste management Renewable Energy Sustainability and the Environment Environmental remediation Geography Planning and Development 0211 other engineering and technologies 02 engineering and technology Building and Construction 010501 environmental sciences Management Monitoring Policy and Law 01 natural sciences chemistry.chemical_compound chemistry Reagent Environmental chemistry Soil water polycyclic aromatic hydrocarbons photocatalysis remediation chromatography advanced oxidation Photocatalysis Pyrene Photodegradation 0105 earth and related environmental sciences |
| Zdroj: | Sustainability; Volume 9; Issue 5; Pages: 870 |
| ISSN: | 2071-1050 |
| DOI: | 10.3390/su9050870 |
| Popis: | Increased industrialization has introduced a lot of hazardous materials into ecosystems. Polycyclic aromatic hydrocarbons (PAHs) are among the most toxic and persistent organic pollutants emanating from petrochemical industrial areas. Remediation of PAHs-contaminated soil has been a particularly big challenge. Photochemical oxidation–reduction processes have gained attention because of their high efficiency and robustness for PAH removal from contaminated soils. In this study, the efficacy of Fe-based and Zn-based Fenton reagents for remediating soil contaminated with pyrene (Pyr) and fluoranthene (Flr) is evaluated. UV treatment (2-h exposure) at 254 nm resulted in 21.6 and 28.5% degradations of Pyr and Flr, respectively. The Zn-based Fenton reagent performed better than the Fe-based reagent by degrading 99.9% of Pyr. The Fe-based Fenton reagent (under UV light) resulted in 97.1–99.7% and 95.1–98.9% Pyr and Flr degradations, respectively, in 0.5–2 h. Notably, the temperature increase during UV irradiation facilitated the enhanced degradation of Pyr and Flr, as observed from negative correlations (r = (−)0.902–0.961 and p = 0.039–0.098) between the temperature and PAH concentrations. The newly tested Zn-based Fenton reagent was equally effective as the Fe-based Fenton reagent in degrading Pyr and Flr in soil. Hence, it can be used as a new alternative reagent to remediate PAH-polluted soils. |
| Databáze: | OpenAIRE |
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