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Sustainability 2017, 9(5), 870; doi:10.3390/su9050870

Oxidative Photodegradation of Pyrene and Fluoranthene by Fe-Based and Zn-Based Fenton Reagents

1
Soil Sciences Department, College of Food & Agriculture Sciences, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi Arabia
2
Plant Protection Department, College of Food & Agriculture Sciences, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi Arabia
3
Department of Environmental Sciences, Faculty of Biological Sciences, Quaid-I-Azam University, Islamabad 45320, Pakistan
*
Author to whom correspondence should be addressed.
Academic Editor: Vincenzo Torretta
Received: 28 March 2017 / Revised: 15 May 2017 / Accepted: 17 May 2017 / Published: 22 May 2017
(This article belongs to the Section Sustainable Use of the Environment and Resources)
View Full-Text   |   Download PDF [1136 KB, uploaded 22 May 2017]   |  

Abstract

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. View Full-Text
Keywords: polycyclic aromatic hydrocarbons; photocatalysis; remediation; chromatography; advanced oxidation polycyclic aromatic hydrocarbons; photocatalysis; remediation; chromatography; advanced oxidation
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Hussain, A.; Al-Barakah, F.N.; Al-Sewailem, M.; El-Saeid, M.H.; Waqar, M.; Ahmad, M. Oxidative Photodegradation of Pyrene and Fluoranthene by Fe-Based and Zn-Based Fenton Reagents. Sustainability 2017, 9, 870.

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