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Photo-Fenton degradation assisted by in situ generation of hydrogen peroxide using a carbon nitride photocatalyst
Journal of Water Process Engineering ( IF 7 ) Pub Date : 2020-07-03 , DOI: 10.1016/j.jwpe.2020.101467
André Torres-Pinto , Maria J. Sampaio , Jessica Teixo , Cláudia G. Silva , Joaquim L. Faria , Adrián M.T. Silva

Metal-free carbon nitride photocatalysts can generate hydrogen peroxide (H2O2) in the presence of dissolved oxygen and visible light radiation. H2O2 leads to the formation of hydroxyl radicals, which can mineralize phenolic compounds in the liquid phase. Adding dissolved iron into the mixture promotes the classical Fenton reaction, improving the degradation process. Low dosages of dissolved iron added to the carbon nitride photocatalytic system can enhance ∼1.2 times the mineralization of resorcinol, phenol, gallic acid, and benzoic acid (phenolic compounds) at its natural pH. The system is self‑sufficient, using on-site heterogeneous photocatalytically synthesised H2O2, which induces homogenous Fenton reactions without acidifying the effluents.



中文翻译:

使用氮化碳光催化剂原位产生过氧化氢辅助光芬顿降解

无金属的氮化碳光催化剂在溶解氧和可见光辐射的存在下会产生过氧化氢(H 2 O 2)。H 2 O 2导致形成羟基自由基,该羟基自由基可在液相中矿化酚类化合物。将溶解的铁添加到混合物中会促进经典的Fenton反应,从而改善降解过程。在自然pH下,低剂量的溶解铁添加到氮化碳光催化系统中,可使间苯二酚,苯酚,没食子酸和苯甲酸(酚类化合物)的矿化作用提高约1.2倍。该系统使用现场异质光催化合成的H 2 O 2自给自足,可引起均质的Fenton反应,而不会酸化废水。

更新日期:2020-07-03
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