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.
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