由于微量有机污染物(Micro-organic pollutants,MCs)在饮用水源中被频繁检出,MCs微污染日益受到水处理行业的关注.高锰酸钾(Potassium permanganate,PM)具有氧化性强、适用pH范围广、操作简便安全等优点,其在我国饮用水厂预氧化工艺中的应用已日趋广泛.本文综述了PM对多类代表性MCs(包括内分泌干扰物、药物、农药等)的降解效能,讨论了MCs结构特点、pH和水中共存物质(腐植酸、无机离子)对PM与MCs反应动力学的影响、反应机理以及反应溶液的毒性变化,以期为饮用水厂PM预氧化工艺的优化提供参考.
With the frequent detection of micro-organic pollutants (MCs) in drinking water sources,the micro-pollution of MCs has aroused great concerns.Potassium permanganate (PM) has been increasingly applied as a pre-oxidation agent in drinking water treatment plants due to its advantageous features such as strong oxidation potential,good adaptivity to a broad pH range,and easy and safe operation.In this paper,the degradation efficiencies of several typical classes of MCs by PM are comprehensively reviewed,including endocrine disrupting chemicals,pharmaceuticals,and pesticides.The impacts of MCs' chemical structures,pH and co-existing materials in water (i.e.,humic acid and inorganic ions) on the reaction kinetics of PM with MCs,the reaction pathways,and the toxicity variation of the reaction solution are all discussed.It is expected to provide a valuable reference to drinking water treatment plants for optimization of the PM pre-oxidation process.
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