title: Correlating 2-MIB and microcystin concentrations with environmental parameters in two reservoirs in South Taiwan.
abstract: Cyanobacteria are present in many drinking water reservoirs in Taiwan, and some of them may produce off-flavour compounds and natural toxins. To investigate the correlation among two groups of cyanobacterial metabolites, microcystins and 2-methylisoborneol (2-MIB), and other environmental parameters, approximately 22 water quality and meteorological parameters were monitored for two source waters (Moo-Tan and Tseng-Wen reservoirs) in south Taiwan from August 2003 to April 2005. Monitoring results showed that the two groups of cyanobacterial metabolites were present in the source waters. Concentrations of 2-30 ng/L of 2-MIB was observed for the two reservoirs, while that of the total concentrations of the five microcystin congeners measured were between 30 and 340 ng/L. The concentration of both 2-MIB and microcystins showed higher concentrations in warmer seasons. A stepwise regression technique was employed to correlate 2-MIB and microcystins concentrations with all the corresponding water quality and meteorological parameters. Correlations among 2-MIB concentration, microcystin concentration, water temperature and air temperature were found in the water samples collected from both reservoirs. The correlations may provide a simple means for the water utility to anticipate the two groups of cyanobacterial metabolites in the two source waters.
authors.affiliation: Department of Environmental Engineering, National Cheng Kung University, Tainan City, 70101, Chinese Taiwan.
authors.forename: H
authors.initials: H
authors.lastname: Yen
authors.forename: T
authors.initials: T
authors.lastname: Lin
authors.forename: I
authors.initials: I
authors.lastname: Tseng
authors.forename: S
authors.initials: S
authors.lastname: Tung
authors.forename: M
authors.initials: M
authors.lastname: Hsu
mesh_terms: D001892:Camphanes / Q000032:analysis*; D000458:Cyanobacteria / Q000378:metabolism*; D004784:Environmental Monitoring / Q000379:methods*; D052998:Microcystins / Q000032:analysis*; D013624:Taiwan; D013696:Temperature; D014867:Water / Q000032:analysis / Q000378:metabolism; D014871:Water Microbiology; D014874:Water Pollutants, Chemical / Q000032:analysis; D018508:Water Purification; D014881:Water Supply
chemical_list: D001892:Camphanes; D052998:Microcystins; D014874:Water Pollutants, Chemical; D014867:Water; C005536:2-methylisoborneol