闽江水域的细菌数量及其与COD和pH值之间的关系初探

A preliminary study on bacteria counts in relation to COD and pH of Min River water

摘要: 于2008年对闽江水域11个监测点的水样进行分析,用稀释平板法测定可培养细菌数,用重铬酸盐法分析化学需氧量(COD),并对几个指标之间的关系进行了初步探讨。结果表明:从地理位置上看,建溪(U-4)和中盐码头(D-11)的可培养细菌数远高于其他9个监测点,这两个监测点的细菌总数也相对最高;从季节上看,建溪的可培养细菌数在1月份、5月份、7月份以及11月份都处于同一数量级,较3月份和9月份要高出一个数量级。从总体趋势看,COD浓度的变化规律是:上游中游下游。利用SPSS软件对试验结果进行相关性分析,发现水环境中细菌数量与化学需氧量以及pH值之间存在着一定的相关性。

Abstract: Bacteria counts,chemical oxygen demand(COD) and pH of the water samples from 11 Min River monitoring sites were tested regularly for a preliminary correlation analysis.The results showed that the cultivated bacteria and total bacteria counts at the Jianxi River and Zhongyan Pier sites were higher than the others.In general,the upstream COD tended to be the highest,followed by midstream and downstream.The regression analysis by SPSS software indicated that there was a significant correlation among the bacteria counts,COD and pH of water samples in Min River.