地表水水体中COD_(Cr)和BOD_(5)相关性分析  

Correlation Analysis of COD_(Cr)and BOD_(5) in Surface Water Bodies

作　　者：黄加元 郭效瑛 李伟 马理 HUANG Jia-yuan;GUO Xiao-ying;LI Wei;MA Li(Guangxi Colleges and Universities Key Laboratory of Regional Ecological Environment Analysis and Pollution Control of Guixi,Baise 533000,China;College of Chemistry and Environmental Engineering,Baise University,Baise 533000,China)

机构地区：[1]桂西区域生态环境分析和污染控制广西高校重点实验室,广西百色533000 [2]百色学院化学与环境工程学院,广西百色533000

出　　处：《安徽化工》2021年第5期72-74,77,共4页Anhui Chemical Industry

基　　金：百色学院博士科研启动基金项目(DC2000002743)。

摘　　要：化学需氧量(COD)和五日生化需氧量(BOD_(5))是反映地表水质量的重要指标。分析了2020年6~10月2条河流的COD_(Cr)和BOD_(5)的监测数据,结果表明,2条河流均属于中度污染,河1的有机物污染较严重。河1上游的COD_(Cr)和BOD_(5)的比值小于0.30,但河1中、下河段含有较少的可被微生物降解的有机物。河2上、中、下游的COD_(Cr)和BOD_(5)比值在0.05~0.40、0.10~0.78和0.06~0.55,说明水体中可被微生物降解的有机物变化大。相关性分析表明,河1上、中游的COD_(Cr)和BOD_(5)线性关系不明显,而河1下游和河2的COD_(Cr)和BOD_(5)无线性相关性,说明水体的水质变化比较大。相关性研究不仅有助于及时发现水质变化,而且能为地表水水体污染预防提供理论参考。Chemical oxygen demand(COD)and fiveday biochemical oxygen demand(BOD5)are important indicators reflecting the quality of surface water.This paper analyzes the monitoring data of COD_(Cr)and BOD_(5)in two rivers from June to October 2020.The results show that both rivers are moderately polluted and the organic pollution in river 1 is more serious.The ratio of COD_(Cr)and BOD_(5)in the upper reaches of river 1 is less than 0.30,but the middle and lower reaches of river 1 contain less organic matter that can be degraded by microorganisms.The ratios of the upper,middle and lower reaches of river 2 are between 0.05~0.40,0.10~0.78 and 0.06~0.55,indicating that the organic matter in the water body that can be degraded by microorganisms varied greatly.Correlation analysis shows that the linear relationship between COD_(Cr)and BOD_(5)in the upper and middle reaches of river 1 is not obvious,but there was no linear correlation between COD_(Cr)and BOD_(5)in the lower reaches of river 1 and river 2.The correlation study is not only helpful to discover the change of water quality in time,but also can provide theoretical reference for the prevention of surface water pollution.

关 键 词：化学需氧量(CODCr) 五日生化需氧量(BOD5) 相关性 地表水 

分 类 号：X832[环境科学与工程—环境工程]