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以南方某微污染水源水为研究对象,分析了不同化学预氧化/混凝沉淀工艺对三氯乙醛生成潜能(CHFP)的去除作用,以找出合适的化学预氧化方式及其最佳投加量,为三氯乙醛(CH)的控制提供指导。结果表明,与混凝沉淀工艺联用,能够有效去除CHFP的化学预氧化药剂有:KMnO_4、ClO_2、H_2O_2和O_3,其最佳投量分别为0.4、0.5、3和0.5 mg/L,对CHFP的去除率分别为78.73%、75.59%、77.82%和74.83%;ClO_2和O_3预氧化在较大的投加量条件下,经混凝沉淀后CHFP增加,而KMnO_4和H_2O_2预氧化在较大投加量条件下,经混凝沉淀后对CHFP的去除作用明显;臭氧/过氧化氢(O_3/H_2O_2)预氧化使CHFP增加,不适用于常规工艺中对CH的控制。
Taking a slightly polluted source water in the south as the research object, the removal of CHP from different chemical pre-oxidation / coagulation-sedimentation processes was analyzed in order to find out the suitable chemical pre-oxidation method and the best solution Add, provide guidance for the control of chloral (CH). The results showed that the combination of coagulation and sedimentation process can effectively remove CHFP chemical pre-oxidation agents: KMnO_4, ClO_2, H_2O_2 and O_3, the best dosage were 0.4,0.5,3 and 0.5 mg / L, CHFP The removal rates of the two catalysts were 78.73%, 75.59%, 77.82% and 74.83%, respectively. The pre-oxidation of ClO_2 and O_3 under the conditions of larger dosage increased CHFP after coagulation and sedimentation, while the pre-oxidation of KMnO_4 and H_2O_2 Under the condition of adding amount, the removal of CHFP was obvious after coagulation and sedimentation; the pre-oxidation of ozone / hydrogen peroxide (O 3 / H 2 O 2) increased CHFP, which was not suitable for the control of CH in the conventional process.