2-氟-5-甲酰基苯甲酸是合成奥拉帕尼等的关键中间体。以2-氟-5-甲酰基苯腈为原料,经乙二醇保护醛基、氰基水解、脱保护三步得到目标化合物2-氟-5-甲酰基苯甲酸,并对各步反应条件进行了优化,三步反应平均收率77.8%。目标化合物2-氟-5-甲...2-氟-5-甲酰基苯甲酸是合成奥拉帕尼等的关键中间体。以2-氟-5-甲酰基苯腈为原料,经乙二醇保护醛基、氰基水解、脱保护三步得到目标化合物2-氟-5-甲酰基苯甲酸,并对各步反应条件进行了优化,三步反应平均收率77.8%。目标化合物2-氟-5-甲酰基苯甲酸经1 H NMR和MS表证。展开更多
The experiments were performed to investigate the degradation of microcystins in order to assess the effectiveness and feasibility of UV/H2O2 system for the disinfection of water polluted by microcystins. The influenc...The experiments were performed to investigate the degradation of microcystins in order to assess the effectiveness and feasibility of UV/H2O2 system for the disinfection of water polluted by microcystins. The influence factors such as H2O2, pH and UV light intensities were investigated respectively. Degradation of microcystin-RR （MC-RR） could be fitted by either the pseudo-first-order or second-order rate equations. This homogenous system could significantly enhance the degradation rate due to the synergetic effect between UV and H2O2. The degradation mainly followed the mechanism of direct photolysis and .OH oxidation reactions. Experimental results showed that 94.83% of MC-RR was removed under optimal experimental conditions and the UV/H2O2 system provided an alternative to promote the removal of microcystins in drinking water supplies.展开更多
文摘The experiments were performed to investigate the degradation of microcystins in order to assess the effectiveness and feasibility of UV/H2O2 system for the disinfection of water polluted by microcystins. The influence factors such as H2O2, pH and UV light intensities were investigated respectively. Degradation of microcystin-RR （MC-RR） could be fitted by either the pseudo-first-order or second-order rate equations. This homogenous system could significantly enhance the degradation rate due to the synergetic effect between UV and H2O2. The degradation mainly followed the mechanism of direct photolysis and .OH oxidation reactions. Experimental results showed that 94.83% of MC-RR was removed under optimal experimental conditions and the UV/H2O2 system provided an alternative to promote the removal of microcystins in drinking water supplies.
