Analysis of microcystins in cyanobacteria blooms and surface water samples from Meiliang Bay, Taihu Lake, China

Shen, Pingping; Shi, Qian; Zhang, Hua; Kong, Fanxiang; Wang, Z.G; Zhuang, Shendong; Chen, D.C

doi:10.1016/s0160-4120(03)00047-3

Cited by 122 publications

(84 citation statements)

References 24 publications

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“…Pronounced prevalence of these variants was often reported to be characteristic of Microcystis-dominated blooms, although the variants did not always concur and their relative ratios were variable [15]. Changes in MC composition during sample period were both quantitative and qualitative.…”

Section: Contents and Species Of Microcystin In Water Samplesmentioning

confidence: 98%

Cyanobacteria and their toxins in Guanting Reservoir of Beijing, China

Dai

Liu

et al. 2008

Journal of Hazardous Materials

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The present study investigated the cyanobacteria and one family of their toxins-microcystins (MCs) in Guanting Reservoir of Beijing, China. The dominant species in the cyanobacteria found in August and September of 2006 was Microcystis, which accounted 99% of total algal cells. The specific species of the Microcystis in the cyanobacteria included Microcystis ichthyobalbe, Microcystis novacekii, Microcystis botrys and Microcystis aeruginosa which had different ratios in different sites. The qualitative analysis by HPLC showed that two microcystins were contained in cyanobacteria and one microcystin was in water of the reservoir. The major microcystins were microcystin-RR (MC-RR) and microcystin-LR (MC-LR), but only MC-LR was detected in water. The quantitative analysis by HPLC indicated that the maximum concentrations of MC-RR and MC-LR contained in cyanobacteria were 0.74 and 0.41 mg/g dry weight, respectively. The maximum microcystin concentration in water was 1.15 g/L and others were below 1 g/L.

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Section: Contents and Species Of Microcystin In Water Samplesmentioning

confidence: 98%

Cyanobacteria and their toxins in Guanting Reservoir of Beijing, China

Dai

Liu

et al. 2008

Journal of Hazardous Materials

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“…In 2001, it was reported that the dominant cyanobacteria species in Mailiang Bay was Microcystis spp., especially Microcystis aeruginosa (more than 80%), and the highest estimated concentration of MC-LR in drinking water was 10.38 lg/L (Shen et al, 2003). However, in 2007, we found that the dominant cyanobacteria species in Meiliang Bay was not only M. aeruginosa but also A. flos-aquae, and the highest estimated level of MC-LR in water samples was even higher (12.27 lg/L).…”

Section: Discussionmentioning

confidence: 59%

“…These blooms and the release of microcystins have seriously affected the aquatic ecosystem and surrounding populations. In Meiliang Bay, the most identified microcystins was MC-LR and the highest concentration was even over 10 lg/L, which was 10 times higher than the guideline level of 1.0 lg/L MC-LR in drinking water recognized by WHO (Chorus and Bartam, 1999;Kondo et al, 2002;Shen et al, 2003). During the peak of the cyanobacteria blooms in Tai Lake, estimated daily intakes for local humans from the consumption of tissues of bivalves were 12-to 23.5-fold the tolerable daily intake value proposed by WHO (Chen and Xie, 2007).…”

Section: Introductionmentioning

confidence: 84%

“…In recent decades, with the rapid development of the economy and the intensive use of water resources, the water quality of Tai Lake has been deteriorating (Shen et al, 2003). Serious water pollution resulting from the large amounts of wastewater discharged into Tai Lake has led to the high increase of total nitrogen and phosphorus levels (results in Table I) and leading to eutrophication.…”

Section: Discussionmentioning

confidence: 99%

“…Massive cyanobacterial blooms occur annually and may last 8 months (Dokulil et al, 2000). Microcystins produced by these blooms have badly affected the population surrounding the lake, especially the people whose life depends on the lake (Shen et al, 2003;Wu et al, 2006;Chen and Xie, 2007). So, the potential hazard risks associated with microcystins in Tai Lake were investigated in this study.…”

Section: Discussionmentioning

confidence: 99%

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Identification of microcystins in waters used for daily life by people who live on Tai Lake during a serious cyanobacteria dominated bloom with risk analysis to human health

Zhang

Zhu

2008

Environmental Toxicology

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Tai Lake is the third largest freshwater lake in China with annual cyanobacteria blooms. Microcystins produced by these blooms have serious health risks for populations surrounding the lake, especially for people living on Tai Lake, because they usually drink raw lake water after a simple alum treatment. This study presents data on the detection and identification of microcystins in waters used for daily life by people living on Tai Lake, during the cyanobacterial blooming in July 2007. The health risks from drinking these microcystin-polluted waters were also calculated. The main microcystins detected by high-performance liquid chromatography-electrospray ionization mass spectrometry in the water samples collected from two parts of Tai Lake (Wuli Lake and Meiliang Bay) were MC-LR (4.33-12.27 lg/L), MC-RR (8.36-16.91 lg/L) and MC-YR (1.41-5.57 lg/L). Risk assessment showed that the drinking water simply treated by alum was not safe. The lowest calculated hazards ratios in all water samples was 6.4, which indicated that the risk of microcystins exposure from drinking water was over six times higher than the tolerable daily intake (TDI) recommended by The World Health Organization (WHO). Further studies should be conducted to elucidate the relationships between the epidemiology of people living on Tai Lake and microcystins exposure from drinking water. # 2008 Wiley Periodicals, Inc. Environ Toxicol 24: 82-86, 2009

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Cyanobacteria

2008

Medical Toxicology of Natural Substances

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Analysis of microcystins in cyanobacteria blooms and surface water samples from Meiliang Bay, Taihu Lake, China

Cited by 122 publications

References 24 publications

Cyanobacteria and their toxins in Guanting Reservoir of Beijing, China

Cyanobacteria and their toxins in Guanting Reservoir of Beijing, China

Identification of microcystins in waters used for daily life by people who live on Tai Lake during a serious cyanobacteria dominated bloom with risk analysis to human health

Cyanobacteria

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