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| Degradation of 2-methylisoborneol in water by hydroxyl radical |
| CHENG Jian-guo1, BAI Min-dong2, YU Yi-xuan1, TIAN Yi-ping1, ZHANG Zhi-tao1 |
1. Environmental Engineering Institute, Marine engineering college, Dalian Maritime University, Dalian 116026, China;
2. Collaborative Innovation Center for Exploitation and Utilization of Marine Biological Resources, College of Environment and Ecology, Xiamen University, Xiamen 361102, China |
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Abstract 2-methylisoborneol (2-MIB) produced by cyanobacteria and actinomycetes is a saturated bicyclic-tertiary alcohol, which can cause earthy/musty taste and odor in surface water. Moreover, 2-MIB is usually difficult to be decomposed and removed by conventional water treatment process. In this paper, hydroxyl radical (·OH) generated by a strong ionization discharge process at atmosphere pressure was used to degrade 2-MIB in water, of which the removal efficiency including dose effects and contact reaction time were investigated. The intermediate products formed in ·OH treatment process were analyzed by GC-MS, and the oxidative degradation mechanism of 2-MIB by ·OH was discussed. Results show that the removal rate for 2-MIB with initial concentration of 150and 300ng/L could reach 96% and 97.6% within 6.0s, while the total reactive oxidant (TRO) dose were 1.8and 2.3mg/L, respectively. After ·OH treatment, the concentration of 2-MIB in water was lower than 10ng/L (lower than the human olfactory threshold). The degradation effects of 2-MIB were obviously reduced by the ·OH scavengers tertiary butyl alcohol (TBA), indicating that ·OH should be the main oxidant for 2-MIB oxidative degradation. By analyzing the intermediates produced in the oxidative degradation process, it was found that the bridge ring structures of 2-MIB could be destroyed by ·OH and finally mineralized to CO2 and H2O.
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Received: 07 April 2017
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| [1] |
Su M, Yu J, Zhang J, et al. MIB-producing cyanobacteria (Planktothrix sp.) in a drinking water reservoir:distribution and odor producing potential[J]. Water Research, 2015,68:444-453.
|
| [2] |
Sun D, Yu J, An W, et al. Identification of causative compounds and microorganisms for musty odor occurrence in the huang pu river, China[J]. Journal of Environmental Science-China, 2013, 25(3):460-465.
|
| [3] |
邵晨,黎雷,于水利,等.产嗅藻类对东太湖某地原水中嗅味物质2-MIB的贡献[J]. 中国环境科学, 2014,34(9):2328-2333.
|
| [4] |
徐盈,黎雯,吴文忠,等.东湖富营养水体中藻菌异味性次生代谢产物的研究[J]. 生态学报, 1999,19(2):212-216.
|
| [5] |
Norio S, Kazunori N. Causative microorganisms for musty odor occurrence in the eutrophic lake kasumigaura[J]. Hydrobiologia, 2000,434(1):145-150.
|
| [6] |
GB5749-2006生活饮用水卫生标准[S]. 中国人民共和国卫生部, 2006.
|
| [7] |
Zoschke K, Dietrich N, Bornick H, et al. UV-based advanced oxidation processes for the treatment of odour compounds:efficiency and by-product formation[J]. Water Research, 2012, 46(16):5365-5373.
|
| [8] |
Fotiou T, Triantis T M, Kaloudis T, et al. Photocatalytic degradation of water taste and odour compounds in the presence of polyoxometalates and TiO2:Intermediates and degradation pathways[J]. Journal of Photochemistry and Photobiology A:Chemistry, 2014,286(15):1-9.
|
| [9] |
Jung S W, Baek K H, Yu M J. Treatment of taste and odor material by oxidation and adsorption[J]. Water Science and Technology, 2004,49(9):289-295.
|
| [10] |
李学艳,马军,陈忠林,等.若干氧化剂对水中嗅味物质2-MIB的氧化去除[J]. 黑龙江大学自然科学学报, 2007,24(1):76-80.
|
| [11] |
李学艳,高乃云,沈吉敏,等.O3/H2O2降解水中致嗅物质2-MIB的效能与机理[J]. 环境科学学报, 2009,29(2):344-352.
|
| [12] |
Tran H, Evans G M, Yan Y, et al. Photocatalytic removal of taste and odour compounds for drinking water treatment[J]. Water Science and Technology, 2009,9(5):477-483.
|
| [13] |
Zhang Y B, Bai M D, Chen C, et al. ·OH Treatment for killing of harmful organisms in ship's ballast water with medium salinity based on strong ionization discharge[J]. Plasma Chemistry and Plasma Processing, 2013,33(4):751-763.
|
| [14] |
Bai M, Zhang Z, Bai M. Simultaneous desulfurization and denitrification of flue gas by ·OH radicals produced from O2+ and water vapor in a duct[J]. Environmental Science & Technology, 2012,46(18):10161-10168.
|
| [15] |
Bai M, Zheng Q, Tian Y, et al. Inactivation of invasive marine species in the proce ss of conveying ballast water using ·OH based on a strong ionization discharge[J]. Water Research, 2016, 96:217-224.
|
| [16] |
Lowke J J, Morrow R. Theoretical analysis of removal of oxides of sulphur and nitrogen in pulsed operation of electrostatic precipitators[J]. IEEE Transactions on Plasma Science, 1995, 23(4):661-671.
|
| [17] |
Staehelin J, Hoigne J. Decomposition of ozone in water:rate of initiation by hydroxide ions and hydrogen peroxide[J]. Environmental Science & Technology, 1982,16(10):676-681.
|
| [18] |
Yang Y, Jiang J, Lu X, et al. Production of sulfate radical and hydroxyl radical by reaction of ozone with peroxymonosulfate:a novel advanced oxidation process[J]. Environmental Science & Technology, 2015,49(12):7330-7339.
|
| [19] |
Bai M, Bai X, Zhang Z, et al. Treatment of red tide in ocean using non-thermal plasma based advanced oxidation technology[J]. Plasma Chemistry and Plasma Processing, 2005,25(5):539-550.
|
| [20] |
Xie P, Ma J, Liu W, et al. Removal of 2-MIB and geosmin using UV/persulfate:contributions of hydroxyl and sulfate radicals[J]. Water research, 2015,69:223-233.
|
| [21] |
成建国,刘开颖,白敏冬,等.顶空固相微萃取-气相色谱-质谱联用测定饮用水中的2-甲基异莰醇和土臭素[J]. 色谱, 2015, 33(12):1287-1293.
|
| [22] |
Watson S B, Brownlee B, Satchwill T, et al. Quantitative analysis of trace levels of geosmin and MIB in source and drinking water using headspace SPME[J]. Water Research, 2000,34(10):2818-2828.
|
| [23] |
Gunten V U. Ozonation of drinking water:part Ⅱ. Disinfection and by-product formation in presence of bromide, iodide or chlorine[J]. Water Research, 2003,37(7):1469-1487.
|
| [24] |
Yuan B, Xu D, Li F, et al. Removal efficiency and possible pathway of odor compounds (2-methylisoborneol and geosmin) by ozonation[J]. Separation and Purification Technology, 2013,117(30):53-58.
|
| [25] |
Mizuno T, Shiya O, Fumitake N. O3/H2O2 Process for both removal of odorous algal-derived compounds and control of bromate ion formation[J]. Ozone:Science & Engineering. 2011, 33(2):121-135.
|
| [26] |
Bang H, Slokar Y M, Ferrero G, et al. Removal of taste and odor causing compounds by UV/H2O2 treatment:effect of the organic and inorganic water matrix[J]. Desalination and Water Treatment, 2016,57(57):1-10.
|
| [27] |
Park G, Yu M, Go J, et al. Comparison between ozone and ferrate in oxidising geosmin and 2-MIB in water[J]. Water Science & Technology, 2007,55(5):117-125.
|
| [28] |
Luo Y. Handbook of bond dissociation energies in organic compounds[M]. United States of America:CRC Press LLC, 2003:170-210.
|
| [29] |
Smith M B, March J. March's advanced organic chemistry:reactions, mechanisms, and structure[M]. 6th edition. New Jersey:John Wiley & Sons Inc, 2007:28-35,1736-1750.
|
| [30] |
Qi F, Xu B, Chen Z, et al. Efficiency and products investigations on the ozonation of 2-methylisoborneol in drinking water[J]. Water Environment Research, 2009,81(12):2411-2419.
|
|
|
|
