Bromate removal

Introduction: with the continuous improvement of drinking water treatment requirements, the application of bromate removal technology in drinking water has also attracted widespread attention of the industry So what about bromate removal? In the process of drinking water treatment, ozone will oxidize the bromine ion in the water to form the oxidizing pollutant bromate, which will increase the risk of carcinogenesis in the experimental mice and is considered to have potential carcinogenicity What is the method of bromate removal? Next, let's introduce Baibai safety net in detail Bromate has been recognized as a potential carcinogen of class 2b in the world It is a by-product of natural water (including bromide) such as mineral water or mountain spring water after ozone disinfection Internationally, the maximum allowable concentration of bromate in drinking water stipulated by the World Health Organization and the United States Environmental Protection Agency is within 0.01mg/l As bromate is a by-product of ozone sterilization, ozone is recognized as the most effective disinfection method It is difficult to use what technology to replace ozone sterilization In the absence of a more effective sterilization method than ozone, a method that can selectively decompose the carcinogens of bromate in natural mineral water without affecting the sterilization effect of reserved ozone will be the best choice The conventional production process of drinking natural mineral water includes pump pressure, ozone sterilization, storage and transportation, secondary ozone addition and final bottling In addition to many organic and inorganic substances, there are also bromides of ppb level in natural raw water When ozone was added for the first time, bromides reacted with ozone and converted to bromate (BrO3 -), which was usually 10-20 ppb in content After ozone was added for the second time, the bromides were bottled and left in water Adding ozone for the second time before bottling (the content is about 100 ppb) is to ensure that there is a certain amount of ozone residue in the bottled water, which can disinfect the water and the bottle cap at the same time, which is very important in the bottling process In the existing UV technology, although the bromate can be moderately decomposed by using low-pressure, medium pressure or high-pressure mercury lamp UV light, the ozone reserved before bottling can also be decomposed more intensively at the same time, because the decomposition of ozone is the most severe at the UV wavelength of 230-270 nm, while the bromate can be moderately decomposed at 200-250 nm It was found that the most suitable UV wavelength should be between 200-230 nm, which not only ensures the decomposition of bromate but also does not affect the reserved ozone The wavelength of UV light source is 200-230 nm The test results show that the remover can selectively and efficiently decompose bromate in natural mineral water without affecting the reserved ozone The above is the knowledge about bromate removal compiled by Xiaobian I hope it can help you who are interested Do you want to know more about bromate? Please continue to follow the next update of Baibai safety net Editor in charge: Chen miaoqi