title: Reductive degradation of oxygenated polycyclic aromatic hydrocarbons using an activated magnesium/co-solvent system.
abstract: This study evaluates the capability of zero-valent magnesium and a protic co-solvent to promote the degradation of oxygenated polycyclic aromatic hydrocarbons compounds, specifically 9-fluorenone, 9,10-anthraquinone, 7,12-benz(a)anthraquionone, and 7H-benz(de)anthracene-7-one. At room temperature conditions, greater than 86% degradation efficiency is observed after 24h of reaction time for a mixture containing 0.05 g of magnesium and four selected oxygenated aromatic hydrocarbons with 250 mg L(-1) concentrations. It is noted that glacial acetic acid is needed as an activator for the degradation reaction to proceed. It is also presumed that the acid removes oxide and hydroxide species from the magnesium surface. With the GC-MS analysis of the reaction products, possible reductive pathways are suggested. Furthermore, this study is the first report on the degradation of these emerging contaminants and it is proposed that the magnesium-powder/protic-solvent system is a promising low-cost reagent and may allow for the future development of an economic and environmentally-friendly remediation application.
authors.affiliation: Environmental Chemistry Laboratory, University of Central Florida, 4000 Central Florida Blvd., Orlando, FL 32816, United States.
authors.forename: Marc R
authors.initials: MR
authors.lastname: Elie
authors.forename: Christian A
authors.initials: CA
authors.lastname: Clausen
authors.forename: Cherie L
authors.initials: CL
authors.lastname: Yestrebsky
mesh_terms: D019342:Acetic Acid / Q000737:chemistry; D052918:Environmental Restoration and Remediation; D000431:Ethanol / Q000737:chemistry; D008401:Gas Chromatography-Mass Spectrometry; D007700:Kinetics; D007773:Lactates / Q000737:chemistry; D008274:Magnesium / Q000737:chemistry*; D010084:Oxidation-Reduction; D010100:Oxygen / Q000737:chemistry; D011084:Polycyclic Aromatic Hydrocarbons / Q000737:chemistry* / Q000378:metabolism; D012989:Soil Pollutants / Q000737:chemistry*; D012997:Solvents / Q000737:chemistry*; D013696:Temperature
chemical_list: D007773:Lactates; D011084:Polycyclic Aromatic Hydrocarbons; D012989:Soil Pollutants; D012997:Solvents; D000431:Ethanol; C015866:ethyl lactate; D008274:Magnesium; D019342:Acetic Acid; D010100:Oxygen