The degradation of formaldehyde gas was studied using UV/TiO2/O3 process under the condition of continuous flow mode. The effects of humidity, initial formaldehyde concentration, residence time and ozone adding amount...The degradation of formaldehyde gas was studied using UV/TiO2/O3 process under the condition of continuous flow mode. The effects of humidity, initial formaldehyde concentration, residence time and ozone adding amount on degradation of formaldehyde gas were investigated. The experimental results indicated that the combination of ozonation with photocatalytic oxidation on the degradation of formaldehyde showed a synergetic action, e.g,, it could considerably increase decomposing of formaldehyde. The degradation efficiency of formaldehyde was between 73.6% and 79.4% while the initial concentration in the range of 1.84--24 mg/m^3 by O3/TiO2flJV process. The optimal humidity was about 50% in UV/TiO2/O3 processs and degradation of formaldehyde increases from 39.0% to 94.1% when the ozone content increased from 0 to 141 mg/m^3. Furthermore, the kinetics of formaldehyde degradation reaction could be described by Langmuir-Hinshelwood model. The rate constant k of 46.72 mg/（m^3.min） and Langmuir adsorption coefficient K of 0.0268 m^3/mg were obtained.展开更多
用两种方法从便宜的原料N-苯基邻氨基苯甲酸出发,合成了新型的,具有荧光活性的吖啶衍生物9-(1-氮杂环丁基)吖啶Ⅲ。用核磁1 H NMR、13 C NMR、高分辨质谱HR MS以及熔点等手段,对每种化合物或者中间体,进行了必要的结构表征。并通过紫外...用两种方法从便宜的原料N-苯基邻氨基苯甲酸出发,合成了新型的,具有荧光活性的吖啶衍生物9-(1-氮杂环丁基)吖啶Ⅲ。用核磁1 H NMR、13 C NMR、高分辨质谱HR MS以及熔点等手段,对每种化合物或者中间体,进行了必要的结构表征。并通过紫外滴定法、荧光滴定法等手段,结合溴乙锭荧光探针等实验,得出了化合物Ⅲ与DNA以嵌插模式结合,并计算得到了相应的结合常数,结合位点。展开更多
基金Project supported by the Science Project of Harbin City(No. H2001-12)the Youth Foundation of School of Municipal and Environmental Engineering in Harbin Institute of Technology(No. 01306914).
文摘The degradation of formaldehyde gas was studied using UV/TiO2/O3 process under the condition of continuous flow mode. The effects of humidity, initial formaldehyde concentration, residence time and ozone adding amount on degradation of formaldehyde gas were investigated. The experimental results indicated that the combination of ozonation with photocatalytic oxidation on the degradation of formaldehyde showed a synergetic action, e.g,, it could considerably increase decomposing of formaldehyde. The degradation efficiency of formaldehyde was between 73.6% and 79.4% while the initial concentration in the range of 1.84--24 mg/m^3 by O3/TiO2flJV process. The optimal humidity was about 50% in UV/TiO2/O3 processs and degradation of formaldehyde increases from 39.0% to 94.1% when the ozone content increased from 0 to 141 mg/m^3. Furthermore, the kinetics of formaldehyde degradation reaction could be described by Langmuir-Hinshelwood model. The rate constant k of 46.72 mg/（m^3.min） and Langmuir adsorption coefficient K of 0.0268 m^3/mg were obtained.
文摘用两种方法从便宜的原料N-苯基邻氨基苯甲酸出发,合成了新型的,具有荧光活性的吖啶衍生物9-(1-氮杂环丁基)吖啶Ⅲ。用核磁1 H NMR、13 C NMR、高分辨质谱HR MS以及熔点等手段,对每种化合物或者中间体,进行了必要的结构表征。并通过紫外滴定法、荧光滴定法等手段,结合溴乙锭荧光探针等实验,得出了化合物Ⅲ与DNA以嵌插模式结合,并计算得到了相应的结合常数,结合位点。
