Cobalt(Ⅱ)ion can catalyze the decolorrization reaction of hydrogan peroxide and m-cresol purple in a pH=10.0 NH3-NH4Cl buffer solution.The kinetic condition was studied,and the apparent activation energy(E′a=51.2...Cobalt(Ⅱ)ion can catalyze the decolorrization reaction of hydrogan peroxide and m-cresol purple in a pH=10.0 NH3-NH4Cl buffer solution.The kinetic condition was studied,and the apparent activation energy(E′a=51.26 KJ/mol.)and apparent rate constant[k′=1.13×10-4(s-1)]were determined.The linear range is 4.0~40 μg/L,and the detection limit for cobalt(Ⅱ)is 6.0×10-10 g/mL.The method was applied to the direct determination of trace Co(Ⅱ)in VB12,Jasmine tea and groundwater samples.展开更多
文摘本文研究了阿特拉津在土壤表面的紫外光光解的动力学,并研究了各种因素对光解的影响.实验表明,土壤粒度、湿度、pH值、有机质、腐殖酸和表面活性剂都影响阿特拉津在土壤中的降解.在紫外光辐射下,阿特拉津在土壤表面降解速率常数为(0.09~0.17)/min,光解深度为0.1~0.3 mm,半衰期为4~8 min.
文摘Cobalt(Ⅱ)ion can catalyze the decolorrization reaction of hydrogan peroxide and m-cresol purple in a pH=10.0 NH3-NH4Cl buffer solution.The kinetic condition was studied,and the apparent activation energy(E′a=51.26 KJ/mol.)and apparent rate constant[k′=1.13×10-4(s-1)]were determined.The linear range is 4.0~40 μg/L,and the detection limit for cobalt(Ⅱ)is 6.0×10-10 g/mL.The method was applied to the direct determination of trace Co(Ⅱ)in VB12,Jasmine tea and groundwater samples.