针铁矿催化氧化溴酚生成羟基多溴联苯醚和溴代二噁英  

Formation of hydroxylated polybrominated diphenyl ethers and polychlorinated dibenzo-p-dioxins via goethite-catalyzed oxidation of bromophenols

作　　者：孙粉玲 丁佳锋 周时洋[1] 林坤德[1,2] 

机构地区：[1]浙江工业大学生物与环境工程学院,杭州310032 [2]厦门大学环境与生态学院,厦门361102

出　　处：《环境化学》2015年第9期1581-1586,共6页Environmental Chemistry

基　　金：国家自然科学基金(21277124;21477115)资助

摘　　要：探究了针铁矿催化转化溴酚(2,4-DBP或2,4,6-TBP)生成羟基化多溴联苯醚(HO-PBDEs)和溴代二噁英(PBDD/Fs)的可能性.结果表明,针铁矿可以在常温和干反应条件下有效地催化转化溴酚化合物生成HO-PBDEs和PBDD/Fs.反应16 d,97.3%的2,4-DBP被针铁矿氧化转化,其中2.4%被转化为2′-OH-BDE-68,2.8%被转化为2,2′-OH-BB-80,0.2%被转化1,3,8-TrBDD,0.4%被转化为2,4,6,8-TeBDF.同样的反应时间内,98.7%的2,4,6-TBP被针铁矿氧化转化,反应产物可能为2′-OH-BDE-121、4′-OH-BDE-121、1,3,6,8-TeBDD和1,3,7,9-TeBDD.根据检测到的产物,提出了针铁矿氧化转化溴酚的可能途径.The formation of hydroxylated polybrominated diphenyl ethers （ HO-PBDEs ） and brominated dibenzo-p-dioxins, dibenzofurans （ PBDD/Fs ） from goethite-catalyzed oxidation of bromophenols （ BPs, e. g., 2, 4-DBP and 2, 4, 6-TBP ） was investigated. Results showed that goethite readily catalyzed the conversion of 2,4-DBP and 2,4,6-TBP to HO-PBDEs and PBDD/Fs under dry conditions and at ambient temperature. In 16 d, 97.3%of 2,4-DBP was converted and the yields of 2′-OH-BDE-68, 2,2′-OH-BB-80, 1,3,8-TrBDD and 2,4,6,8-TeBDF were 2.4%, 2.8%, 0.2% and 0. 4%, respectively. Similarly, 98. 7% of 2,4,6-TBP was transformed and the possible reaction products were 2′-OH-BDE-121, 4′-OH-BDE-121, 1,3,6,8-TBDD and 1,3,7,9-TBDD. The possible formation pathways for the goethite-catalyzed oxidation of bromophenols were proposed.

关 键 词：针铁矿 羟基多溴联苯醚 溴代二噁英 耦合反应 

分 类 号：X592[环境科学与工程—环境工程]