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纳米铁氧化物催化类Fenton反应降解抗生素磺胺

DOI: 10.11654/jaes.2015.07.018

Keywords: 铁氧化物 类Fenton反应 磺胺 降解

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Abstract:

采用纳米铁矿物(赤铁矿α-Fe2O3、磁赤铁矿γ-Fe2O3、磁铁矿Fe3O4、水铁矿Fe5HO8·4H2O)为催化剂与H2O2构成类Fenton反应,进行抗生素磺胺的氧化降解研究,并考察磺胺初始浓度、铁氧化物投加量、H2O2浓度、溶液pH等对磺胺氧化降解过程的影响。结果表明,磺胺初始浓度2 mg·L-1、赤铁矿投加量1 g·L-1、H2O2浓度30 mL·L-1、溶液pH 3.6和温度25 ℃条件下,反应72 h后磺胺的降解率为99.27%。利用LC-MS进行产物分析,表明铁氧化物催化类Fenton反应降解磺胺主要是催化氧化反应,磺胺分子结构中的对位氨基被氧化成硝基

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