|
|
Catalytic wet air oxidation of main components of landfill leachate. |
|
|
Abstract Mn/Ce compound oxides catalyst was employed to decomposition of main components (such as n-hexanoic, n-butyric, acetic acids and ammonia nitrogen) in old landfill leachates by catalytic wet air oxidation (CWAO), and then the interaction between organic acids and ammonia nitrogen was discussed during the oxidation process.The main components in old landfill leachates were decomposed (>90% in 120min) by CWAO, and the inhibition between n-hexanoic, n-butyric and acetic acids was observed for the degradation of organic acids mixtures during the temperature-rising stage in CWAO. Furthermore, the degradation rate of n-butyric acid decreased when ammonia nitrogen present and n-butyric acid also inhibited decomposition of ammonia nitrogen in CWAO. Ni2+ could lead the catalyst to poison, and restrained catalytic activity of the catalyst.
|
Received: 08 October 2008
|
|
|
|
|
|
|