Formation of Bromate in UV/Cl2, UV/NH2Cl and UV/ClO2 Combining Processes
HUANG Xin,GAO Nai-yun,DING Guo-ji and LU Ning
DOI:10.11835/j.issn.1674-4764.2010.06.023
Received April 19, 2010,Revised , Accepted , Available online July 01, 2015
Volume ,2010,Pages 132-136
- Abstract
The effect of UV irradiation on bromate (BrO3-) formation is investigated in H2O-Br--Cl2/NH2Cl/ClO2 systems. It is found that partial bromide ion was oxidized to BrO3- by Cl2/UVC. NH3 can inhibit the forming of bromate effectively, and no production of bromate is observed by NH2Cl/UVC. The bromate formation capability of ClO2/UV system is weaker than that of the Cl2/UV. Furthermore, the amount of bromate produced in ClO2/UVC is larger than that in ClO2/UVA. Both the formation of bromate and the decomposition of chlorine dioxide are improved in acidic conditions, whereas alkaline conditions lead to reverse effects.