期刊
ENVIRONMENTAL CHEMISTRY LETTERS
卷 13, 期 4, 页码 453-458出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s10311-015-0519-1
关键词
Iodide ion; Ozone; Advanced oxidation process; Oxidation; Hydrogen peroxide; Natural organic matter
资金
- National Research Foundation of Korea (NRF) Grants - Korea government (MEST) [NRF-2013R1A1A2074404, NRF-2014M3C8A4031049]
- National Research Foundation of Korea [2014M3C8A4034282] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Iodoorganic compounds are known for taste and odor problems in drinking waters. Iodoorganic compounds can be more toxic than chloro- and bromoorganic analogues. There is therefore a need to control the formation of iodoorganic compounds in water treatment plants during ozone oxidation. The ozonation of iodide (I-) at environmental concentrations in water, below 100 mu g/L, is known to yield only iodate (IO3 (-)). Nonetheless, there is few knowledge at higher iodide concentrations such as mg per L levels found in coastal areas and in surface waters contaminated by the hydraulic fracturing. Therefore, we have studied here the reaction of a high concentration of I-, of 20 mu M, 2.54 mg/L, during ozonation and O-3/H2O2 oxidation under various conditions. Results show the production of 20 % hypoiodous acid (HOI) and 80 % IO3 (-) in deionized water, whereas in natural waters results show the production of 8.0-14 % HOI, 75-89 % IO3 (-) and 2.7-10 % unknown iodine compounds. The addition of humic acids increased the production of unknown iodine compounds, possibly formed by reaction of natural organic matter and HOI. Overall, our findings show that ozonation of I- at mg/L levels produces HOI, raising the possibility of forming iodinated by-products, whereas the O-3/H2O2 process can suppress the production of HOI.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据