| Autor: |
Jing-hua, Fan, Bin, Fan, Dao-qiang, Lu, Dan, Qu, Zhao-kun, Luan |
| Rok vydání: |
2006 |
| Předmět: |
|
| Zdroj: |
Huan jing ke xue= Huanjing kexue. 27(6) |
| ISSN: |
0250-3301 |
| Popis: |
We investigated performances as well as influencing factors of electrocatalytic denitrification of a porous titanium loaded Pd-Cu (4:1) cathode, from drinking water. Up to 96.9% of NO3(-)-N may be reduced to N2 with electrocatalytic activity as 16.69 mg/ (g x h). The Nitrate reduction presented an apparent first order reaction at lower nitrate concentration, while a zero order reaction at higher nitrate concentration. Little nitrate reduction was observed when cell voltage (or current) was lower than 1.5 V (or 5 mA); the side reaction of ammonium production became noticeable if the cell voltage (or current) was higher than 4.2 V (or 30 mA). Both the activity and the selectivity were good at a neutral pH; at acidic pH, the activity increased while the selectivity decreased. Mass transfer in solution was found little effect on the reactions in the tests. Other anions such as ClO4-, HCO3-, Cl- did somewhat harms to NO3(-)-N removal with sequence of ClO4-HCO3-Cl-. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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