%0 Journal Article
%T Pilot study on bromate reduction in ozonation of water with low carbonate alkalinities by carbon dioxide<br>
%A Ji Li
%A Li Zou
%A Lulu Guo
%A Jialin Ji
%A <br>
%J 环境科学学报(英文版)
%D 2011
%I 
%X A pilot study was carried out to explore the application of carbon dioxide for pH depression in a bubble column and its ability to inhibit bromate formation for water with a low alkalinity. Results showed that in the absence of ammonia, CO2 was capable of reducing bromate 38.0%–65.4% with one-unit pH depression. CO2 caused a slightly lower bromate reduction (4.2%) than did H2SO4 when the pH was depressed to 7.4, and a more a pronounced lower reduction (8.8%) when the pH was depressed to 6.9. In the presence of 0.20 mg/L-N ammonia, bromate was largely inhibited with 73.9% reduction. When the pH was depressed to 7.4, CO2 and H2SO4 showed an 11.3% and 23.5% bromate reduction respectively, demonstrating that the joint use of CO2 and ammonia might be a plausible strategy of blocking all three bromate formation pathways. CO2 could be applied through the aeration diifuser together with ozone gas, resulting in a similar bromate reduction compared with the premixing method through Venturi mixer.
%K ozone
%K bromate
%K carbon dioxide<br>
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=6CB1530875F53489BF1E81BD87B7F5E6&aid=6ABCDD27917C78B46F141FCB8A4E4D1F&yid=9377ED8094509821&vid=EA389574707BDED3&iid=9CF7A0430CBB2DFD&sid=CBBCA10F35A35A94&eid=592CC3414B588215&journal_id=1001-0742&journal_name=Journalofenvironmentalsciences(China)&referenced_num=0&reference_num=4