河流中氨氮、总氮和总磷污染情况及相关性分析

Pollution of Ammonia Nitrogen,Total Nitrogen and Total Phosphorus in a River and Their Correlation Analysis

使用流动注射分光光度法在2020年7~10月间,对一河流的上中下游3个监测断面(河段1~河段3)的氨氮、总氮和总磷进行了监测,并做了综合分析。结果表明,该河流的氨氮、总氮和总磷浓度几乎均超过Ⅴ类水标准,且水体富营养化严重。氨氮-总氮与总磷-总氮比值分别多在0.8~0.9和0.1,说明水体受到的氮污染主要是氨氮污染,而且氮污染比磷污染严重。相关性分析表明,河段1和河段2的氨氮与总氮、氨氮与总磷有显著相关性,相关系数r的范围为0.8106~0.9869,而河段3的氨氮与总氮、氨氮与总磷无相关性。该河流需要及时进行富营养化治理,控制污染源,避免水质进一步恶化。

The ammonia nitrogen(NH_(4)-N),total nitrogen(TN)and total phosphorous(TP)of three monitoring sections(reach 1~reach 3)at the upstream,middle stream and downstream of a river were monitored and analyzed by flow injection spectrophotometry from July to October 2020.The results show that the concentrations of NH_(4)-N,TN and TP in the river almost exceed the class V water standard,and the water body is seriously eutrophic.The ratios of NH_(4)-N to TN and TP to TN are mostly 0.8~0.9 and 0.1 respectively,indicating that the nitrogen pollution of water body is mainly NH_(4)-N pollution,and nitrogen pollution is more serious than phosphorus pollution.Correlation analysis shows that there are significant correlations between NH_(4)-N and TN,NH_(4)-N and TP in reach 1 and reach 2,and the correlation coefficient r ranged from 0.8106 to 0.9869,while there is no correlation between NH_(4)-N and TN,NH_(4)-N and TP in reach 3.The river needs timely eutrophication treatment to control pollution sources and avoid further deterioration of water quality.