摘要
该文从消毒过程中涉及到的氧化还原反应的电极电势出发,借助元素电势图以及半反应的pH-电势图,发现当处理水pH为7时,二氧化氯还原为亚氯酸根的电极电势为0.95 V,低于溴离子被氧化成溴酸盐的电极电势(1.03 V),从而在理论上解释了用二氧化氯消毒处理饮用水时,即使在处理水中含有溴离子的情况下,也不会形成溴酸盐,该结论也得到了实验数据的支持。
Based on the electrochemical redox potential for the RO reactions in the processes of disinfection, with the help of element potential diagrams and the Pourbaix (pH/potential) diagram, it was found that the potential of chlorine dioxide(0.95 V), reduced to chlorite, is lower than the potential ( 1.03 V) of bromonium ions oxidized to hromate, when the pH is 7. So, even if the drinking water which to be treated containing bromide, no bromate able to be produced using chlorine dioxide as disinfectant. The conclusion has also been proved by the experimental results.
出处
《净水技术》
CAS
2010年第3期14-17,共4页
Water Purification Technology
关键词
饮用水
溴酸盐
二氧化氯
消毒
drinking water bromate chlorine dioxide disinfect