College of Pharmacy, Wuhan University, Wuhan 430071, China.
J Environ Sci (China). 2011;23(4):575-81. doi: 10.1016/s1001-0742(10)60450-0.
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 microg/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".
在令人震惊的“无锡饮用水危机”之后，过去两年中对太湖蓝藻水华及其毒素污染的调查不断增加，并进行了报道。然而，在 2007 年危机之前，关于这些问题的信息仍然不足。为了提供进一步比较的背景数据，本研究报告了我们在 2004 年进行的调查，涉及太湖蓝藻毒素污染以及富营养化状况。对无锡市饮用水资源附近进行的为期一年的研究结果表明，与最近两年的情况不同，全年蓝藻和绿藻是共同优势种。水柱中最高的毒素浓度（34.2ng/mL）出现在 8 月。在水华生物量中，细胞内毒素的峰值（0.59 微克/毫克 DW）出现在 10 月，滞后于水柱中的毒素峰值。此外，MC-RR 是全年的主要毒素变异体。在研究期间，还每月记录了总氮和磷的营养水平。本研究的结果将有助于更好地了解“无锡饮用水危机”之前的富营养化状况和潜在风险。
