贵州省红枫湖饮用水源地微囊藻毒素含量与水体中氮、磷含量等的相关性

Correlation between the Concentration of Microcystins and N,P of Water Environment in the Drinking Water Source of Hongfeng Lake,Guizhou Province

2008年6～9月对贵州省红枫湖饮用水源地A、B、C采样点及取水口采样，研究了水体中微囊藻毒素即总藻毒素（total microcystin RR和total microcystin LR，TMC—RR、TMC—LR），胞外藻毒素（extracellular microcystinRR和extracellular microcystinLR，EMC—RR、EMC—LR）和胞内藻毒素（intracellular microcystinRR和intracellular microcystinLR，IMC—RR、IMC—LR）含量及相关的TN、TP、NH4-N、NO2-N、COD、Chla、pH等理化指标的变化情况，讨论了理化指标与藻毒素含量之间的相互关系。结果表明藻毒素在时间及空间上分布不均，无明显规律性。藻类高发期间藻毒素以胞内毒素为主要存在形式，去除藻毒素保障饮用水安全最重要的是去除饮用水源水中的藻类。相关性分析表明藻毒素含量与pH、NO2-N、Chla具有统计学意义上的相关性，综合回归分析的结果，pH是影响藻毒素的重要因子，因此贵州省喀斯特弱碱性特殊水环境与藻毒素产生的环境条件值得各方面高度关注。

This paper studied the concentrations of the microcystins, including total microcystin RR and LR, extracellular microcystin RR and LR, and intracellular microcystin RR and LR, analyzed the variation of correlative physicochemical factors including TN, TP, NH4 - N, NO2 - N, COD, Chl a and pH in sampling sites A, B, C and water- supply spot in the drinking water source of Guizhou Hongfeng lake during June to September in 2008, and discussed the correlation between the concentration of the physicochemical factors and the micro- cystins. The results indicated that the distribution of microcystins had no obvious regularities in space - time. In the prosperous season of alga, microcystins mostly existed in the form of intracellular microcystins, and removing the microcystins from the drinking water source was the main measure to ensure the safety of the drinking water. Correlation analysis result showed that the concentration of microcystins was correlated in statistics with pH, NO2 -N and Chla. The regression analysis revealed, pH was the most important factor affecting the micro- cystins. Results also showed that more attention should be paid on the special alkalescence karst water environment in Guizhou province and the condition where the microcystins lives.