饮用水中两种硫醚类嗅味物质的氧化去除
Removal of two typical sulfides odorants by different oxidants in drinking water
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摘要: 本文针对KMnO4、ClO2、NaClO、O3、H2O2去除饮用水中戊基硫醚(diamyl sulfide,DAS)和丙基硫醚(dipropyl sulfide,DPS)进行了研究.在中性室温条件下选取KMnO4、ClO2、NaClO、O3、H2O2 5种氧化方式氧化2000 ng·L-1 DPS、DAS,并探究其去除效果、氧化动力学及氧化机理.实验结果表明,5种氧化方式氧化2000 ng·L-1的DPS、DAS 2 h后,DPS、DAS去除率大多数都达到了90%以上,DPS、DAS氧化后剩余浓度大多低于其嗅阈值;根据动力学常数计算,高锰酸钾与DPS、DAS的二级反应动力学常数分别为2.30×104、1.74×104 L·mol-1·min-1;O3、H2O2氧化结果表明,O3氧化效果明显高于其他氧化方式,但单独使用H2O2效果不及其他氧化剂;ClO2、NaClO在硫醚的氧化中效果显著,去除率接近100%;高锰酸钾在氧化中存在色度问题,当水体中DPS、DAS浓度水平较高时高锰酸钾适用性不强;高锰酸钾、次氯酸钠、二氧化氯等氧化剂会使DPS、DAS氧化成砜类物质,本研究中识别出二戊基砜(diamyl sulfone)、二丙基砜(dipropyl sulfone).Abstract: KMnO4, ClO2, NaClO, O3 and H2O2 were selected as five types of oxidants to examine their removal efficiency towards diamyl sulfide (DAS) and dipropyl sulfide (DPS) in drinking water. The experiment was carried out in neutral conditions at room temperature with the sulfides initial concentration of 2000 ng·L-1. The oxidation removal efficiency, kinetics and mechanisms were systematically studied. The results indicated that the five oxidants were all efficient on removing selected sulfides and their removal rate were over 90% after 2 h oxidation. The residual concentration of selected sulfides was below threshold value after oxidation. According to the results from kinetic experiments, the second-order reaction kinetic constants k of DPS and DAS by KMnO4 oxidation was 2.30×104 L·mol-1·min-1 and 1.74×104 L·mol-1·min-1, respectively. O3 was more efficient than other oxidants on removing DPS and DAS. Meanwhile, the removal rate of DPS and DAS with ClO2 or NaClO was up to 100%. However, the removal of DPS and DAS was insignificant by H2O2. Despite KMnO4 was efficient, the color issue caused by KMnO4 might restrict its application. After oxidation, the transformation products of the selected sulfides by KMnO4, ClO2 and ClO2 were identified by GC-MS, which were diamyl sulfone and dipropyl sulfone.
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[1] 李勇, 张晓健, 陈超. 我国饮用水中嗅味问题及其研究进展[J]. 环境科学, 2009, 30(2):583-588. LI Y, ZHANG X J, CHEN C. Review on the tastes and odors compounds in drinking water of China[J]. Environmental Science, 2009, 30(2):583-588(in Chinese).
[2] RONG C, LIU D, LI Y, et al. Source water odor in one reservoir in hot and humid areas of southern China:Occurrence, diagnosis and possible mitigation measures[J]. Environmental Sciences Europe,2018, 30(1):45-45. [3] SRINIVASAN R, SORIAL G A, et al. Treatment of taste and odor causing compounds 2-methyl isoborneol and geosmin in drinking water:A critical review[J]. Journal of Environmental Sciences, 2011, 23(1):1-13. [4] HATTORI K. Water treatment systems and technology for the removal of odor compounds[J]. Water Science and Technology, 1988, 20(8-9):237-244. [5] 章彩霞. 高锰酸钾去除水中甲硫醚和二甲基三硫醚的试验研究[D]. 长沙:湖南大学, 2016. ZHANG C X. Experimental research on dimethyl trisulfide and dimethyl sulfide oxidation by potassium permanganate in drinking water[D]. Changsha:Hunan University, 2016(in Chinese). [6] 马晓雁, 张泽华, 王红宇, 等. 高铁酸钾对水中藻类及其次生嗅味污染物二甲基三硫醚同步去除研究[J]. 环境科学, 2013, 34(5):1767-1772. MA X Y, ZHANG Z H, WANG H Y, et al. Simultaneous removal of algae and its odorous metabolite dimethyl trisulfide in water by potassium ferrate[J]. Environmental Science, 2013, 34(5):1767-1772(in Chinese).
[7] JAMES R K, KESHAV C D, CHENG H, et al. Effect of pH and temperature on the kinetics of odor oxidation using chlorine dioxide[J]. Journal of the Air & Waste Management Association, 2003, 53(10):1218-1224. [8] LIANG Z, AN T, LI G, et al. Aerobic biodegradation of odorous dimethyl disulfide in aqueous medium by isolated Bacillus cereus GIGAN2 and identification of transformation intermediates[J]. Bioresource Technology, 2015, 175:563-568. [9] CANTAU C, LARRIBAU S, PIGOT T, et al. Oxidation of nauseous sulfur compounds by photocatalysis or photosensitization[J]. Catalysis Today, 2007, 122(1-2):27-38. [10] MALLEVIALLE J, SUFFET I H. Identification and treatment of tastes and odors in drinking water[R]. AWWA, 1981. [11] MA M, LIU R, LIU H, et al. Effect of moderate pre-oxidation on the removal of Microcystis aeruginosa by KMnO4-Fe (Ⅱ) process:Significance of the in-situ formed Fe (Ⅲ)[J]. Water Research, 2012, 46(1):73-81. [12] ANTONOPOULOU M, EVGENIDOU E, LAMBROPOULOU D, et al. A review on advanced oxidation processes for the removal of taste and odor compounds from aqueous media[J]. Water Research, 2014, 53:215-234. [13] WEN G, QIANG C, FENG Y, et al. Bromate formation during the oxidation of bromide-containing water by ozone/peroxymonosulfate process:Influencing factors and mechanisms[J]. Chemical Engineering Journal, 2018, 352:316-324. [14] CHEN Y T, CHEN W R, LIN T F. Oxidation of cyanobacterial neurotoxin beta-N-methylamino-L-alanine (BMAA) with chlorine, permanganate, ozone, hydrogen peroxide and hydroxyl radical[J]. Water Research, 2018, 142:187-195. [15] LANGLAIS B, RECKHOW D A, BRINK D R. Ozone in water treatment:Application and engineering[M]. Routledge, 2019. [16] WANG H, ZHAN J, YAO W, et al. Comparison of pharmaceutical abatement in various water matrices by conventional ozonation, peroxone (O3/H2O2), and an electro-peroxone process[J]. Water Research, 2018, 130:127-138. [17] YAO W, REHMAN S W U, WANG H, et al. Pilot-scale evaluation of micropollutant abatements by conventional ozonation, UV/O3, and an electro-peroxone process[J]. Water Research, 2018, 138:106-117. [18] ROSENFELDT E J, LINDEN K G, Canonica S, et al. Comparison of the efficiency of OH radical formation during ozonation and the advanced oxidation processes O3/H2O2 and UV/H2O2[J]. Water Research, 2006, 40(20):3695-3704. [19] WINTER P, DUCKHAM S C. Analaysis of volatile odour compounds in digested sewage sludge and aged sewage sludge cake[J]. Water Science and Technology, 2000, 41(6):73-80. [20] CRITTENDEN J C, TRUSSELL R R, HAND D W, et al. MWH's water treatment:Principles and design[M]. John Wiley & Sons, 2012. [21] KAINULAINEN T, TUHKANEN T, VARTIAINEN T, et al. The effect of different oxidation and filtration processes on the molecular size distribution of humic material[J]. Water Science and Technology, 1994, 30(9):169. [22] HRUDEY S E, CHARROIS J W A. Disinfection by-products and human health[M]. IWA Publishing, 2012. [23] AMOOZADEH A, NEMATI F. A clean, mild, and selective oxidation of sulfides to sulfoxides using NaClO/H2SO4 in aqueous media[J]. Phosphorus, Sulfur, and Silicon, 2009, 184(10):2569-2575. [24] JAYARAMAN A, EAST A L L. The mechanism of permanganate oxidation of sulfides and sulfoxides[J]. The Journal of Organic Chemistry, 2011, 77(1):351-356. [25] KUTCHIN A V, RUBTSOVA S A, LOGINOVA I V. Reactions of chlorine dioxide with organic compounds. Selective oxidation of sulfides to sulfoxides by chlorine dioxide[J]. Russian Chemical Bulletin, 2001, 50(3):432-435. -

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