Cyanobacteria-/cyanotoxin-contaminations and eutrophication status before Wuxi Drinking Water Crisis in Lake Taihu, China  

作　　者：Yongmei Liu Wei Chen Dunhai Li Zebo Huang Yinwu Shen Yongding Liu 

机构地区：[1]College of Pharmacy, Wuhan University, Wuhan 430071, China. [2]Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China

出　　处：《Journal of Environmental Sciences》2011年第4期575-581,共7页环境科学学报（英文版）

基　　金：supported by the National Basic Research Program(973)of China:"Water environmental quality evolution and water quality criteria in lakes"(No.2008CB418200);the National High Technology Research and Development Program(863)of China(No.2007AA10Z344)

摘　　要：After the appalling ＂Wuxi Drinking Water Crisis＂, increasing investigations concerning the contaminations of cyanobacterial blooms and their toxins in Lake Taihu have been performed and reported in the last two years. However, information regarding these issues before the crisis in 2007 remained insufficient. To provide some background data for further comparisons, the present study reported our investigations conducted in 2004, associated with the cyanotoxin contaminations as well as the eutrophication status in Lake Taihu. Results from the one-year-study near a drinking water resource for Wuxi City indicated that, unlike the status in recent two years, cyanobacteria and chlorophyta are the co-dominance species throughout the year. The highest toxin concentration （34.2 ng/mL） in water columns occurred in August. In bloom biomass, the peak value of intracellular toxin （0.59 μg/mg DW） was determined in October, which was lag behind that in water column. In addition, MC-RR was the major toxin variant throughout the year. During the study period, nutrients levels of total nitrogen and phosphorus were also recorded monthly. Results from the present study will lead to a better understanding of the eutrophication status and the potential risks before ＂Wuxi Drinking Water Crisis＂.After the appalling ＂Wuxi Drinking Water Crisis＂, increasing investigations concerning the contaminations of cyanobacterial blooms and their toxins in Lake Taihu have been performed and reported in the last two years. However, information regarding these issues before the crisis in 2007 remained insufficient. To provide some background data for further comparisons, the present study reported our investigations conducted in 2004, associated with the cyanotoxin contaminations as well as the eutrophication status in Lake Taihu. Results from the one-year-study near a drinking water resource for Wuxi City indicated that, unlike the status in recent two years, cyanobacteria and chlorophyta are the co-dominance species throughout the year. The highest toxin concentration （34.2 ng/mL） in water columns occurred in August. In bloom biomass, the peak value of intracellular toxin （0.59 μg/mg DW） was determined in October, which was lag behind that in water column. In addition, MC-RR was the major toxin variant throughout the year. During the study period, nutrients levels of total nitrogen and phosphorus were also recorded monthly. Results from the present study will lead to a better understanding of the eutrophication status and the potential risks before ＂Wuxi Drinking Water Crisis＂.

关 键 词：cyanobacterial blooms EUTROPHICATION MICROCYSTINS Lake Taihu 

分 类 号：X524[环境科学与工程—环境工程] TU991.2[建筑科学—市政工程]