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首页> 外文期刊>Separation and Purification Technology >Removal of phenol in high salinity media by a hybrid process (activated sludge + photocatalysis)
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Removal of phenol in high salinity media by a hybrid process (activated sludge + photocatalysis)

机译：通过混合过程（活性污泥+光催化）去除高盐度介质中的苯酚

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The degradation of phenol by a hybrid process (activated sludge+photocatalysis) in a high salinity medium (50 gL~(-1) of chloride) has been investigated.The sludge used from a municipal wastewater facility was adapted to the high salt concentrations prior to use.The photocatalytic conditions were optimized by means of a factorial experimental design.TiO2 P25 from Degussa was used as the photocatalyst.The initial phenol concentration was approximately 200 mg L~(-1) and complete removal of phenol and a mineralization degree above 98% were achieved within 25 h of treatment (24 h of biological treatment and 1 h of photocatalysis).From HPLC analyses,five hydroxylated intermediates formed during oxidation have been identified.The main ones were catechol and hydroquinone,followed by 1,2,4-benzenetriol,2-hydroxy-1,4-benzoquinone,and pyrogallol,in this order.No formation of organochlorine compounds was observed.Therefore,the proposed hybrid process showed itself to be suited to treat phenol in the presence of high contents of salt.
机译：研究了在高盐度介质（50 gL〜（-1）氯化物）中通过混合过程（活性污泥+光催化）降解苯酚的方法。通过析因实验设计优化了光催化条件，以德固赛公司的TiO2 P25为光催化剂，初始苯酚浓度约为200 mg L〜（-1），完全去除了苯酚，矿化度高于在处理25小时（生物处理24小时和光催化1小时）中达到98％。通过HPLC分析，已鉴定出氧化过程中形成的5种羟基化中间体。主要的邻苯二酚和对苯二酚，其次为1,2， 4-苯三醇，2-羟基-1,4-苯醌和邻苯三酚的顺序。未观察到有机氯化合物的形成。因此，拟议的混合工艺表明其适用于处理苯酚中的苯酚。高盐含量的存在。

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