Occurrence of swampy/septic odor and possible odorants in source and finished drinking water of major cities across China

被引:47
作者
Wang, Chunmiao [1 ,2 ]
Yu, Jianwei [1 ,2 ]
Guo, Qingyuan [1 ,3 ]
Sun, Daolin [1 ]
Su, Ming [1 ,2 ]
An, Wei [1 ]
Zhang, Yu [1 ,2 ]
Yang, Min [1 ,2 ]
机构
[1] Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Drinking Water Sci & Technol, Beijing 100085, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[3] Yancheng Inst Technol, Coll Environm Sci & Engn, Yancheng 224051, Peoples R China
基金
中国国家自然科学基金;
关键词
Swampy/septic odor; Thioethers; Drinking water; Odor activity value; ORGANIC SULFUR-COMPOUNDS; OFF-FLAVOR COMPOUNDS; CHEMICAL SPILL; MUSTY ODOR; RIVER; LAKE; IDENTIFICATION; CYANOBACTERIA; REMOVAL; CARBON;
D O I
10.1016/j.envpol.2019.03.041
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Swampy/septic odors are one of the most important odor types in drinking water. However, few studies have specifically focused on it compared to the extensive reported musty/earthy odor problems, even though the former is much more offensive. In this study, an investigation covering the odor characteristics, algal distribution and possible odorants contributing to swampy/septic odor, including dimethyl disulfide (DMDS), dimethyl trisulfide (DMTS), diisopropyl sulfide (DIPS), dipropyl sulfide (DPS), dibutyl sulfide (DBS), 2-methylisoborneol (2-MIB) and geosmin (GSM), was performed in source and finished water of 56 drinking water treatment plants (DWTPs) in 31 cities across China. While the musty/earthy and swampy/septic odors were dominant odor descriptors, the river source water exhibited a higher proportion of swampy/septic odor (38.5%) compared to much higher detection rate of musty/earthy odor (50.0%) in the lake/reservoir source water. The occurrence of swampy/septic odor, which was much easier to remove by conventional drinking water treatment processes compared to musty/earthy odors, was decreased by 62.9% and 46.3% in river and lake/reservoir source water respectively. Statistical analysis showed that thioethers might be responsible for the swampy/septic odor in source water (R-2 = 0.75, p <0.05). Specifically, two thioethers, DMDS and DMTS were detected, and other thioethers were not found in all water samples. DMDS was predominant with a maximum odor activity value (OAV) of 2.0 in source water and 1.3 in finished water. The distribution of the thioethers exhibited a marked regional characteristics with higher concentrations being detected in the east and south parts of China. The high concentrations of thioethers in lake/reservoir source water samples could be partly interpreted as the bloom of the cyanobacteria. This study provides basic information for swampy/septic odor occurrence in drinking water and will be helpful for further water quality management in water industry in China. (C) 2019 Elsevier Ltd. All rights reserved.
引用
收藏
页码:305 / 310
页数:6
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