title: Photolysis degradation of polyaromatic hydrocarbons (PAHs) on surface sandy soil.
abstract: Polycyclic aromatic hydrocarbons (PAHs) are potent environmental pollutants, and some of them have been identified as carcinogenic and mutagenic. To advance the knowledge of the environmental fate of PAHs, we systematically investigated the influence of different UV wavelengths irradiation on photolysis of PAHs on sandy soil under tow wavelengths (254 and 306 nm) UV irradiation for six PAHs. In addition, kinetic model and influence of several parameters on PAHs photolysis have been studied. The results obtained indicated that UV radiation with a wavelength of 306 nm was more efficient in the photolysis of the polycyclic aromatic hydrocarbons. Our results showed that fluoranthene (Flt) was the fastest in decomposition, has the greatest value for the coefficient of photolysis (7.4 × 10(-3) h(-1)), and has less half-life, reaching 94 h when using a wavelength of 254 nm. The results indicated that the pyrene (Pyr) was more resistant to photolysis in comparison with indeno(1,2,3-cd) pyrene (IP) and fluoranthene (Flt). The results indicate that photolysis is a successful way to remediate the six studied PAHs compounds.
authors.affiliation: Soil Sciences Department, College of Food and Agricultural Sciences, King Saud University, P. O. Box 2460, Riyadh, 11451, Kingdom of Saudi Arabia, elsaeidm@ksu.edu.sa.
authors.forename: Mohamed H
authors.initials: MH
authors.lastname: El-Saeid
authors.forename: Ali M
authors.initials: AM
authors.lastname: Al-Turki
authors.forename: Mahmoud E A
authors.initials: ME
authors.lastname: Nadeem
authors.forename: Ashraf S
authors.initials: AS
authors.lastname: Hassanin
authors.forename: Mohamed I
authors.initials: MI
authors.lastname: Al-Wabel
mesh_terms: D005449:Fluorenes / Q000032:analysis / Q000737:chemistry; D006207:Half-Life; D009153:Mutagens; D010782:Photolysis; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis* / Q000737:chemistry; D011721:Pyrenes / Q000032:analysis / Q000737:chemistry; D012987:Soil / Q000737:chemistry; D012989:Soil Pollutants / Q000032:analysis* / Q000737:chemistry; D014466:Ultraviolet Rays
chemical_list: D005449:Fluorenes; D009153:Mutagens; D011084:Polycyclic Aromatic Hydrocarbons; D011721:Pyrenes; D012987:Soil; D012989:Soil Pollutants; C007738:fluoranthene; C030984:pyrene