Quantitatively assessing the role played by carbonate radicals in BROMATE (cas 15541-45-4) formation by ozonation

Add time:09/02/2019    Source:sciencedirect.com

Bicarbonate scavenges OH to form CO3− that enhances the BROMATE (cas 15541-45-4) formation by ozonation. However, the role of CO3− in the bromate formation during ozonation has never been quantitatively investigated. Herein, we establish a quantitative approach for evaluating the role played by CO3− based on the detection of CO3−-involved bromate and CO3− exposure. Experiments demonstrated that the CO3−-involved bromate was responsible for 33.7–69.9% of the total bromate formed with bicarbonate concentrations from 0.5 mM to 4 mM. The CO3− exposure was two orders of magnitude higher than the corresponding OH exposure during ozonation. These results demonstrate that CO3− plays a comparable or even more pronounced role in the oxidation of bromine during bromate formation than OH. A model was developed based on the ratio of bromine oxidized by CO3−, which could predict the CO3−-involved bromate formation well. Modeled and experimental results illustrated that the contribution of the CO3−-involved bromate to the total bromate decreased with increasing pH or initial bromide, but almost remained unchanged at different ozone dosages. Moreover, the presence of humic acid led to an increase in this contribution during ozonation. The results of this study provide a more in-depth understanding of the mechanism of bromate formation during ozonation.

We also recommend Trading Suppliers and Manufacturers of BROMATE (cas 15541-45-4). Pls Click Website Link as below: cas 15541-45-4 suppliers

Prev:Enhanced performance and mechanism of BROMATE (cas 15541-45-4) removal in aqueous solution by ruthenium oxide modified biochar (RuO2/BC)
Next:Elimination of BROMATE (cas 15541-45-4) from water using aluminum beverage cans via catalytic reduction and adsorption)