Guibal Eric, Vincent Thierry
Ecole des Mines d'Alès, Laboratoire Génie de l'Environnement Industriel, 6, avenue de Clavières, F-30319 Ales, France.
J Environ Manage. 2004 May;71(1):15-23. doi: 10.1016/j.jenvman.2004.01.003.
Glutaraldehyde cross-linked chitosan was loaded with palladium and then reduced using an in situ hydrogen generation procedure (Zn in sulfuric acid solution) to prepare a chitosan-supported palladium catalyst. This catalyst was successfully used to degrade nitrophenol in dilute solutions in the presence of sodium formate as the hydrogen donor. The influence of the initial concentration of nitrophenol and sodium formate was studied in order to determine the minimum molar ratio between these compounds required to achieve complete conversion of the nitrogenous product at two temperatures. Increasing the temperature decreased the excess of hydrogen donor required for complete conversion of nitrophenol. The temperature was also varied between 10 and 60 degrees C in order to determine the activation energy. The pseudo first-order equation was shown to fit degradation kinetics in most cases; however, for some cases it was necessary to use a variable-order equation to model the kinetics.
戊二醛交联壳聚糖负载钯，然后采用原位产氢法（硫酸溶液中的锌）进行还原，制备壳聚糖负载钯催化剂。该催化剂在以甲酸钠为氢供体的情况下，成功用于降解稀溶液中的硝基苯酚。研究了硝基苯酚和甲酸钠初始浓度的影响，以确定在两个温度下实现含氮产物完全转化所需的这两种化合物之间的最小摩尔比。升高温度可减少硝基苯酚完全转化所需的过量氢供体。温度还在10至60摄氏度之间变化，以确定活化能。在大多数情况下，伪一级方程被证明符合降解动力学；然而，在某些情况下，有必要使用变阶方程来模拟动力学。
