Enhanced phenol bioavailability by means of photocatalysis
Phenol was investigated for the ability of TiO2 photocatalysis to increase its bioavailability as an electron donor for denitrification. The rate of nitrate removal by denitrification was increased by up to 2.6-fold by exposing phenol to photocatalysis for 30 min, although the rate decreased with increasing photocatalysis. The increased denitrification rate appeared to be associated with the photocatalytic production of carboxylic acids, but the slow down correlated to the production of catechol and hydroquinone.
KeywordsPhenol Bioavailability Denitrification Photocatalysis Nitrate
The authors acknowledge the financial support by the National Natural Science Foundation of China (50978164), Key project of basic research in Shanghai (11JC1409100), the Special Foundation of Chinese Colleges and Universities Doctoral Discipline (20113127110002), Innovation Fund for Key Projects of Shanghai Municipal Education Commission (10ZZ82), Major Science and Technology Program for Water Pollution Control and Treatment (2009ZX07313-003), and the United States National Science Foundation (0651794).
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