Bromate formation and control in process of removing methyl tert-butyl ether by UV/O3 technology

doi:10.3969/j.issn.0438-1157.2013.08.047

CIESC Journal ›› 2013, Vol. 64 ›› Issue (8): 3031-3038.DOI: 10.3969/j.issn.0438-1157.2013.08.047

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Bromate formation and control in process of removing methyl tert-butyl ether by UV/O₃ technology

ZHAO Guangyu, LV Xiwu, ZHOU Yi

School of Energy and Environment, Southeast University, Nanjing 210096, Jiangsu, China

Received:2013-01-22 Revised:2013-03-23 Online:2013-08-05 Published:2013-08-05
Supported by:
supported by the Major Special Program of Water Pollution Control and Management of China(2009ZX07101-011,2008ZX07421-004).

UV/O₃工艺去除甲基叔丁基醚过程中BrO₃^-的产生与控制

赵光宇, 吕锡武, 周易

东南大学能源与环境学院, 江苏南京 210096

通讯作者: 吕锡武
作者简介:赵光宇(1986- ),男,博士研究生。
基金资助:
国家水体污染控制与治理科技重大专项(2009ZX07101-011,2008ZX07421-004)。

Abstract

Abstract: Bromate is a potential carcinogen and formed in treatment of bromide-containing water using ozone-based technologies.So,the study on bromate formation during removal of organic pollutions is necessary for applying UV/O₃ process.The effects of water background,initial MTBE concentration,ozone dosage and dosing method on removal of methyl tert-butyl ether(MTBE)and formation of bromate were studied.Besides,the mechanism of action for ozone dosing method was explored.The results showed that MTBE removal rates obtained by UV/O₃ process in ultrapure water and tap water were 93.5% and 88.67%,and bromate concentration were 18.01 μg·L^-1 and 12.13 μg·L^-1,respectively,which were higher than the standard value of 10 μg·L^-1.The promotion of initial MTBE concentration inhibited bromate formation,but longer reaction time were compulsory since MTBE concentration was required to be lower than proposed concentration of 5 μg·L^-1.In this case,bromate formation was eventually enhanced.Increase of ozone dosage was favorable for MTBE removal,but caused decline of the utilization rate of ozone and the promotion of bromate formation.Comparing three ozone dosing methods in which the same ozone dosage of 5 mg·min·L^-1 was applied,the highest hydroxyl radical(·OH)exposure and minimum ozone exposure were obtained in the method at ozone concentration of 0.75 mg·L^-1 and reaction time of 120 min.Therefore,the concentrations of MTBE and bromate in water both met the standard values after treatment.

Key words: bromate, methyl tert-butyl ether, UV/O₃ process, hydroxyl radical, ozone

关键词: BrO₃^-, 甲基叔丁基醚, UV/O₃工艺, 羟基自由基, 臭氧

CLC Number:

TU991.2

ZHAO Guangyu, LV Xiwu, ZHOU Yi. Bromate formation and control in process of removing methyl tert-butyl ether by UV/O₃ technology[J]. CIESC Journal, 2013, 64(8): 3031-3038.

赵光宇, 吕锡武, 周易. UV/O₃工艺去除甲基叔丁基醚过程中BrO₃^-的产生与控制[J]. 化工学报, 2013, 64(8): 3031-3038.

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Bromate formation and control in process of removing methyl tert-butyl ether by UV/O₃ technology

UV/O₃工艺去除甲基叔丁基醚过程中BrO₃^-的产生与控制

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