Berlin University of Technology, Department of Water Quality and Control, Strasse des 17. Juni 135, 10623 Berlin, Germany.
Water Res. 2013 Sep 15;47(14):5052-64. doi: 10.1016/j.watres.2013.05.051. Epub 2013 Jun 18.
UV-A (near-UV), UV-C (short-UV) and visible-light assisted Fenton-like treatment of Bisphenol A (BPA) was investigated in pure water and raw freshwater samples spiked with BPA. Treatment performances were evaluated in terms of BPA degradation, dissolved organic carbon (DOC) removal and H2O2 consumption rates. Complete BPA degradation accompanied with significant DOC removal was achieved for all studied processes. Increasing the initial solution pH only exhibited a negative effect on treatment efficiencies when bicarbonate alkalinity was used for pH adjustment, whereas the raw freshwater matrix and irradiation type also influenced oxidation rates appreciably. Acute toxicity analysis employing Vibrio fischeri revealed that the inhibitory effect of BPA decreased significantly during the course of Photo-Fenton-like treatment. Several transformation products could be identified via HPLC and GC-MS analyses including hydroxylated phenolic compounds (hydroquinone; 2-methoxy, 1-4-benzenediol; 4-isopropenylphenol; 4'-hydroxy-acetophenone; 1-(4-cyclohexylphenyl) ethanone; 4-isopropylenecatechol; 4-4'-dihydroxybenzophenone; 4-ethyl,1,3-benzenediol), as well as the ring opening products hexanoic acid methyl ester, fumaric, succinic and oxalic acids. A reaction pathway featuring hydroxylation, dimerization and ring opening steps is proposed.
在纯水和添加了双酚 A (BPA) 的原淡水样品中，研究了 UV-A（近 UV）、UV-C（短 UV）和可见光辅助芬顿样处理。通过 BPA 降解、溶解有机碳 (DOC) 去除和 H2O2 消耗速率来评价处理性能。所有研究的工艺均实现了完全的 BPA 降解和显著的 DOC 去除。当使用碳酸氢盐碱度调节初始溶液 pH 值时，仅增加初始溶液 pH 值对处理效率表现出负面影响，而原淡水基质和辐照类型也显著影响氧化速率。利用发光菌(Vibrio fischeri)进行的急性毒性分析表明，在光芬顿样处理过程中，BPA 的抑制作用显著降低。通过 HPLC 和 GC-MS 分析可以鉴定出几种转化产物，包括羟基化酚类化合物（对苯二酚；2-甲氧基-1,4-苯二酚；4-异丙烯基苯酚；4'-羟基苯乙酮；1-(4-环己基苯基)乙酮；4-异丙烯基儿茶酚；4,4'-二羟基二苯甲酮；4-乙基-1,3-苯二酚），以及开环产物己酸甲酯、富马酸、琥珀酸和草酸。提出了一个涉及羟基化、二聚化和开环步骤的反应途径。
