洋河水库微囊藻毒素含量与水污染指标的相关性研究

Correlation between Microcystin and Water Pollution Indexes of Yanghe Reservoir, Qinhuangdao

目的探讨2007年夏季秦皇岛洋河水库水华高发期微囊藻毒素(MC)与主要污染指标的相关性。方法于2007年7至8月对洋河水库水华期间的微囊藻毒素及叶绿素(Chla)、总磷(TP)、总氮(TN)、透明度(SD)、高锰酸盐指数(CODMn)、pH值、溶解氧(DO)进行49 d连续监测,按照GB 3838—2002《地表水环境质量标准》Ⅱ类水体限值进行评价,采用SPSS 11.0统计软件对微囊藻毒素含量与主要污染指标进行相关性分析。结果洋河水库水体Chla(0.019 mg/L)、TP(0.048 mg/L)、TN(1.680 mg/L)、CODMn为(5.09 mg/L)、SD均超标。MC含量与Chla、TP、CODMn及pH值呈正相关,与TN、SD及DO呈负相关,与TN/TP呈统计学负相关(P<0.05)。结论2007年夏季洋河水库囊藻毒素水平与TN/TP值密切相关,本次研究为水库藻毒素污染防治积累资料。

Objective To know the correlation between microcystin （MC） and the water pollution indexes of Yanghe Reservoir during the period of water bloom. Methods The microcystin concentration and main water pollution indexes chlorophyll-a （ Chla ）, total phosphor （TP）, total nitrogen （TN）, Secchi depth transparency （SD）, CODMn, pH and dissolved oxygen （DO）of 49 consecutive days were determined. The statistical analysis of correlation between microcystin and the water pollution indexes was performed with SPSS 11.0 statistical software with possible correlations among pollution indexes being tested by Bivariat correlations. Results It showed that MC had the positive correlation with chlorophyll-a, TP, pH, and permanganate index （CODMn）, whereas, TN, SD and DO presented the negative influence to MC, especially a significant negative influence existed between TN/TP ratio and MC （P〈 0.05）. Conclusion The level of MC is significantly correlated with TN/TP. The results of the present paper will provide a good support for prevention of MC pollution.