实验室率定法测算长江南通段污染物降解系数

Determining Pollutant Degradation Coefficients of Nantong Section Yangtze River by Rating Method in Laboratory

污染物降解系数是确定水环境容量的关键参数之一,本文采用实验室率定法,采集长江南通段的水样,分别于6℃、10℃、16℃、20℃室温下,在实验室内进行周期为20天的室内水质分析,根据室内水质分析结果,测算出不同温度下长江南通段"十二五"减排的约束性指标化学需氧量、氨氮的降解系数,并定性分析了长江水体中污染物本底浓度、可生化性、pH值等环境因子对污染物降解系数可能发生的影响。

The pollutant degradation coefficient is one of the key technical parameters to determine the water environmental capacity. In this paper, the water quality of the samples collected from Nantong section of Yangtze River were analyzed for 20 days at 6℃, 10℃, 16℃, 20℃ and room temperature respectively using rating method. According to the results of the indoor analysis, the obligatory targets of pollution discharge reduction, degradation coefficients of COD and ammonia nitrogen at different temperature were estimated. Additionally, the effects of environmental factors such as the background concentrations of the pollutants, biodegradability, and pH on the pollutants degradation coefficients of the water in Yangtze were analyzed qualitatively.