Degradation mechanism of ammonia nitrogen synergistic with bromate under UV or UV/TiO 2

Bromate (BrO ) and ammonia nitrogen (NH ) are both typical environmental pollutants: BrO has been categorized as one of the Group 2B carcinogen by IARC; an excess of NH might result in the eutrophication of water. The existence of NH could inhibit the transformation of bromide (Br ) to bromate (BrO...

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Bibliographic Details
Published inEnvironmental science and pollution research international Vol. 30; no. 9; p. 22284
Main Authors Zeng, Yiting, Zeng, Jin, Luo, Zhenwei, Pan, Jiahao, Luo, Yuxia, Liu, Jun, Wang, Chunying
Format Journal Article
LanguageEnglish
Published Germany 01.02.2023
Subjects
Ammonia
Bromates
Nitrogen
Water Pollutants, Chemical - analysis
Water Purification
Photolysis
Ammonia nitrogen
Bromate
Photocatalysis
TiO2
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Summary:Bromate (BrO ) and ammonia nitrogen (NH ) are both typical environmental pollutants: BrO has been categorized as one of the Group 2B carcinogen by IARC; an excess of NH might result in the eutrophication of water. The existence of NH could inhibit the transformation of bromide (Br ) to bromate (BrO ). However, the interaction of NH and BrO during the removal process is not clear. This study intends to disclose the mutual relationships of ammonia nitrogen and bromate ions under UV irradiation or UV/TiO conditions. Without UV irradiation, BrO and NH were both stable even under the presentation of each other. Under UV irradiation or UV/TiO conditions, BrO and NH promoted the degradation of each other, showing the synergistic degradation mechanism. In the neutral environment, both of BrO and NH could be transformed effectively. Furthermore, NH accelerated the transformation of BrO to Br at the reaction beginning and the existence of BrO is beneficial for the transformation of NH to N .
ISSN:1614-7499