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Fenton法氧化处理水中土霉素的研究

Keywords: 土霉素,Fenton试剂,草酸根离子

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Abstract:

为了评价Fenton法预处理抗生素生产废水中残留的高浓度土霉素的可行性,对Fenton试剂(Fe2+-H2O2)法催化氧化降解水溶液中的土霉素进行了研究。探讨了H2O2与Fe2+投加比例、投加量以及起始pH值对降解效果的影响,同时考察了土霉素废水中大量共存的草酸根离子对氧化过程的影响。结果表明,当H2O2与Fe2+按照5∶1的比例投加时降解效率最高,最佳初始pH值在3.0~4.0之间。在最佳投加比例下,H2O2投加量为0.9mmol/L,100mg/L的土霉素可在10min内得到完全降解。最佳反应条件下经过处理后土霉素水溶液TOC的去除率达40%左右,可生化性(BOD5/COD)也得到明显的改善。水中共存的草酸根离子对氧化效率具有明显的影响,但通过增加亚铁离子的量可以消除草酸的影响。

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