【摘要】 研究了壬基酚(NP)溶液初始浓度、溶液初始pH值、臭氧含量对NP降解的影响。结果表明:在pH值为3.0~9.0范围内,pH初始值越大,NP降解率越高;在5~20 mg/L范围内,臭氧体系对它的降解过程遵循表观1级反应动力学规律,表观降解速率常量kobs为0.473 8 min-1;臭氧含量不同时,NP的降解速率也不同,臭氧浓度越高,降解也越快。氧化过程中有小分子羧酸类物质生成。HPLC色谱图表明,在氧化过程中,没有含苯环结构中间产物的明显积累,可能是由于中间产物生成的量很少或者是由于这些中间产物易于进一步氧化降解形成对280 nm紫外光没有吸收的产物(如苯环分裂的产物等)。更多还原

【Abstract】 This study investigates the ozonation of Nonylphenol(NP) in aqueous solution.The affecting factors on the degradation of NP were studied and described in details,such as initial NP concentration,initial pH value and ozone concentration.The results indicated that the degradation efficiency of NP was dependent on the pH value.The higher of pH value was,the higher degradation efficiency of NP in water at pH value over range of 3.0~9.0.The degradation efficiency increased with increasing initial concentration of NP over the range of 5~20 mg/L.The degradation efficiency increased with increasing concentration of O3.In addition,some parameters such as pH,electrical conductivity and degradation products were monitored during the process.During the ozonation process the rapid decrease of pH and the sharp increase of electrical conductivity indicated the formation of acidic by-products were confirmed by high performance liquid chromatography(HPLC).更多还原