Environmental Chemistry Laboratory, University of Central Florida, 4000 Central Florida Blvd., Orlando, FL 32816, United States.
Chemosphere. 2013 May;91(9):1273-80. doi: 10.1016/j.chemosphere.2013.02.031. Epub 2013 Mar 26.
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.
本研究评估了零价镁和质子共溶剂促进含氧多环芳烃化合物（特别是 9-氟蒽酮、9,10-蒽醌、7,12-苯并(a)蒽醌和 7H-苯并(de)蒽-7-酮）降解的能力。在室温条件下，当反应时间为 24 小时，混合了 0.05 克镁和四种浓度为 250mg/L 的含氧芳烃时，观察到大于 86%的降解效率。需要注意的是，冰醋酸是降解反应进行所必需的活化剂。据推测，该酸从镁表面去除氧化物和氢氧化物。通过对反应产物的 GC-MS 分析，提出了可能的还原途径。此外，本研究是首次报道这些新兴污染物的降解，提出镁粉/质子溶剂体系是一种很有前途的低成本试剂，可能为未来开发经济环保的修复应用提供可能。
