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目的了解某市生活饮用水系统微囊藻毒素(MC)污染情况,探讨当地温度、光照时数、降雨量等气候因素与微囊藻毒素-LR(MC-LR)含量相关性。方法 2008~2010年每年3月和9月,采集水源水、出厂水、管网水水样,采用高效液相色谱法检测水中MC-LR的含量;采用SPSS 18.0统计软件对数据进行统计学分析。结果 2008~2010年共检测了248份水样,有12份水样检出MC-LR,总检出率为4.8%,最高含量为0.115μg/L。3月和9月的水样中MC-LR检出率存在极显著性差异(P<0.01),水源水、出厂水和管网水水样中MC-LR检出率无显著性差异(P>0.05)。MC-LR含量与温度、光照时数间存在较强的线性相关关系(P<0.01),与降雨量间无相关关系(P>0.05)。结论某市生活饮用水系统受到以MC-LR为代表的微囊藻毒素的污染,但其值低于国家标准《生活饮用水卫生标准》(GB5749-2006)规定的限值0.001mg/L。温度、光照时数对MC-LR含量有重要影响。
Objective To understand the status of microcystin (MC) pollution in drinking water system of a certain city, and to explore the correlation between the climatic factors such as local temperature, illumination hours, rainfall and microcystin-LR (MC-LR). Methods From March to September of each year from 2008 to 2010, water samples of water source, ex-factory water samples and pipelines were collected. The content of MC-LR in water samples was determined by high performance liquid chromatography (HPLC). The data were analyzed by using SPSS 18.0 statistical software . Results A total of 248 water samples were detected during 2008-2010, and 12 samples were detected by MC-LR with a total detection rate of 4.8% and a maximum of 0.115 μg / L. The detection rate of MC-LR in water samples from March to September was significantly different (P <0.01). There was no significant difference in the detection rate of MC-LR in water samples > 0.05). There was a strong linear correlation between MC-LR content and temperature and light hours (P <0.01), but no correlation with rainfall (P> 0.05). Conclusion The drinking water system in a certain city is contaminated by microcystin represented by MC-LR, but its value is lower than the limit of 0.001mg / L prescribed by the national standard of drinking water hygiene standard (GB5749-2006). Temperature, light hours on MC-LR content has a significant impact.