title: Spatial and Temporal Variations of Taste and Odor Compounds in Surface Water, Overlying Water and Sediment of the Western Lake Chaohu, China.
abstract: The seasonal variations of taste and odor (T&O) compounds in western Lake Chaohu were evaluated from July to December 2013. High values were detected in particulate fractions, with peak values 28.25 ng/L for geosmin (GEO), 45.18 ng/L for dimethyltrisulfide (DMTS), 714.77 ng/L for β-cyclocitral, 11.23 ng/L for β-ionone in surface water, and 14.21 ng/L for GEO, 103.68 ng/L for DMTS, 11.97 ng/L for β-ionone in overlying water, all exceeding their odor thresholds. The maximum off-flavor concentrations in sediment ranged from 2010.76 ng/kg for GEO to 1.7 ng/kg for β-ionone. Positive correlations could be found not only between Anabaena and particulate GEO (r = 0.813, p < 0.01), but also between Microcystis and total β-cyclocitral (r = 0.652, p < 0.01) or β-ionone (r = 0.560, p < 0.01) in surface water. TP, TN, PO4-P, Chl-a and organic matter contributed significantly to the variations of T&O compounds in water or sediment. The cause of the variations of T&O compounds was the accumulation and degradation of cyanobacteria in water rather than nutrient-rich sediment.
authors.affiliation: Hubei Province Key Laboratory for Geographical Process Analysis and Simulation, College of Urban and Environmental Science, Central China Normal University, Wuhan, 430079, Hubei Province, People's Republic of China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Jiang
authors.affiliation: Hubei Province Key Laboratory for Geographical Process Analysis and Simulation, College of Urban and Environmental Science, Central China Normal University, Wuhan, 430079, Hubei Province, People's Republic of China.
authors.forename: Bo
authors.initials: B
authors.lastname: Cheng
authors.affiliation: Hubei Province Key Laboratory for Geographical Process Analysis and Simulation, College of Urban and Environmental Science, Central China Normal University, Wuhan, 430079, Hubei Province, People's Republic of China.
authors.forename: Muxing
authors.initials: M
authors.lastname: Liu
authors.affiliation: Hubei Province Key Laboratory for Geographical Process Analysis and Simulation, College of Urban and Environmental Science, Central China Normal University, Wuhan, 430079, Hubei Province, People's Republic of China. jlhyan@126.com.
authors.forename: Yan
authors.initials: Y
authors.lastname: Nie
mesh_terms: D000447:Aldehydes / Q000032:analysis / Q000737:chemistry; D002681:China; D000458:Cyanobacteria / Q000502:physiology; D004224:Diterpenes / Q000032:analysis / Q000737:chemistry; D004784:Environmental Monitoring; D019015:Geologic Sediments / Q000737:chemistry*; D060106:Lakes / Q000737:chemistry*; D009284:Naphthols / Q000032:analysis / Q000737:chemistry; D045792:Norisoprenoids / Q000032:analysis / Q000737:chemistry; D009812:Odorants; D012621:Seasons; D013440:Sulfides / Q000032:analysis / Q000737:chemistry; D013649:Taste; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000737:chemistry*
chemical_list: D000447:Aldehydes; D004224:Diterpenes; D009284:Naphthols; D045792:Norisoprenoids; D013440:Sulfides; D014874:Water Pollutants, Chemical; C054170:dimethyl trisulfide; C516118:beta-cyclocitral; C008157:beta-ionone; C001278:geosmin
keywords: Lake Chaohu; Overlying water; Sediment; Taste and odor compounds