Odourous algal-derived alkenes: differences in stability and treatment responses in drinking water

Satchwill, Trevor; Watson, Susan B.; Dixon, E. A.

doi:10.2166/wst.2007.167

Cited by 25 publications

(19 citation statements)

References 15 publications

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“…Twenty milliliters of raw lake water was filtered through a GF/A glass filter; then, 10 ml of this raw water and the resulting filtrate were used for the subsequent analyses. The samples were placed in a headspace septum vial containing 4 g NaCl (12). After an internal-standard solution (10 l) of geosmin-D 3 was added, the vial was sealed with a Teflon-lined cap and then gently agitated to dissolve the salt.…”

Section: Methodsmentioning

confidence: 99%

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Cyanobacterial Blue Color Formation during Lysis under Natural Conditions

Arii

Tsuji

Tomita

et al. 2015

Appl Environ Microbiol

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dCyanobacteria produce numerous volatile organic compounds (VOCs), such as ␤-cyclocitral, geosmin, and 2-methylisoborneol, which show lytic activity against cyanobacteria. Among these compounds, only ␤-cyclocitral causes a characteristic color change from green to blue (blue color formation) in the culture broth during the lysis process. In August 2008 and September 2010, the lysis of cyanobacteria involving blue color formation was observed at Lake Tsukui in northern Kanagawa Prefecture, Japan. We collected lake water containing the cyanobacteria and investigated the VOCs, such as ␤-cyclocitral, ␤-ionone, 1-propanol, 3-methyl-1-butanol, and 2-phenylethanol, as well as the number of cyanobacterial cells and their damage and pH changes. As a result, the following results were confirmed: the detection of several VOCs, including ␤-cyclocitral and its oxidation product, 2,2,6-trimethylcyclohexene-1-carboxylic acid; the identification of phycocyanin based on its visible spectrum; the lower pH (6.7 and 5.4) of the lysed samples; and characteristic morphological change in the damaged cyanobacterial cells. We also encountered the same phenomenon on 6 September 2013 in Lake Sagami in northern Kanagawa Prefecture and obtained almost the same results, such as blue color formation, decreasing pH, damaged cells, and detection of VOCs, including the oxidation products of ␤-cyclocitral. ␤-Cyclocitral derived from Microcystis has lytic activity against Microcystis itself but has stronger inhibitory activity against other cyanobacteria and algae, suggesting that the VOCs play an important role in the ecology of aquatic environments.

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Section: Methodsmentioning

confidence: 99%

“…Cyanobacteria produce numerous volatile organic compounds (VOCs), such as ␤-cyclocitral, geosmin, and 2-methylisoborneol (2-MIB) (10)(11)(12)(13). These volatile compounds have been shown to possess lytic activity against cyanobacteria (14).…”

mentioning

confidence: 99%

Cyanobacterial Blue Color Formation during Lysis under Natural Conditions

Arii

Tsuji

Tomita

et al. 2015

Appl Environ Microbiol

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“…There was an outbreak of Dinobryon in Yinchuan at a cell intensity of 5.7 Â 10 4 cells/mL, which was one order of magnitude higher than its CDC value. Previous studies have reported that Dinobryon is likely to be more abundant at low temperatures (Naumenko, 1992;Agbeti and Smol, 1995) and accompanied with the occurrence of significant fishy odors (Rashash et al, 1995;Watson et al, 2001;Satchwill et al, 2007;Zhao et al, 2013). Thus, the strong fishy odor in Yinchuan could be associated with the abnormal growth of Dinobryon.…”

Section: Algal Population Characteristicsmentioning

confidence: 95%

Source-water odor during winter in the Yellow River area of China: Occurrence and diagnosis

Guo

et al. 2016

Environmental Pollution

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a b s t r a c tYellow River source water has long suffered from odor problems in winter. In this study, odor characteristics, potential odorants, and algae in the source water of six cities (Lanzhou, Yinchuan, Hohhot, Zhengzhou, Jinan and Dongying) along the Yellow River were determined in winter (February to March 2014). According to flavor profile analysis (FPA), moderate to strong fishy odors occurred in all cities, except for Lanzhou. At the same time, mild earthy/musty odors and septic/swampy odors were also detected. The strong fishy odor (FPA intensity, 8.5) in Yinchuan was attributed to the abnormal growth of Dinobryon (cell density, 5.7 Â 10 4 cells/mL), while the fishy odors in Hohhot, Zhengzhou, Jinan, and Dongying might be caused by Melosira and Cyclotella, Cryptomonas, Dinobryon, and Synedra, respectively. Unsaturated aldehydes, which have been reported to cause fishy odors, were not detected in all samples. However, some saturated aldehydes, including hexanal, heptanal, nonanal, decanal, and benzaldehyde, were detected with a total concentration range of 690 ng/L to 2166 ng/L, and might have partly contributed to the fishy odors. In addition, 2-MIB (5.77e21.12 ng/L) and geosmin (2.26e9.73 ng/L) were responsible for the earthy/musty odors in the Yellow River source waters, and dimethyl disulfide (648.2 ng/L) was responsible for the rancid/swampy odor (FPA intensity, 8.0) episode in Yinchuan. This is a comprehensive study reporting on the occurrence and possible reasons for the odor issues in the Yellow River source water during winter.

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“…6G-J; Watson et al, 2001a). Similar-sized blooms of these taxa in a large drinking water reservoir (Glenmore Reservoir, Alberta) had very different impacts on the treated water supplies (Watson and Satchwill, 2003;Satchwill et al, 2007). For example, blooms of the colonial chrysophyte Uroglena americana cause numerous T&O events in waters with low to moderate and severe eutrophication (Yano et al, 1988;Watson et al, 1996).…”

Section: Types Of Odors I Fishy/rancid/oily/cucumber and Floral Odorsmentioning

confidence: 99%