长江、青弋江芜湖段水体总有机碳含量及其影响因素的研究

The Research on the TOC and its Influence factors of the Yangtze River and Qingyi River in Wuhu City

地面环境水体中有机物数量是反映水体有机物污染程度的重要指标。为了解长江、青弋江芜湖段水体有机物污染状况和水体质量,笔者通过对长江、青弋江芜湖段水体周围环境状况现场考察,并分段采取代表性水体样品,采用高温燃烧-非色散红外吸收法测定了水样总有机碳(TOC)含量,研究了其总有机碳含量变化及其影响因素。结果表明,长江、青弋江芜湖段水体中总TOC含量平均值分别为(22.2±4.1)mg/L和(22.6±2.7)mg/L,处于较高水平,青弋江个别区域TOC含量超过了40mg/L。长江、青弋江芜湖段水体TOC的浓度均已超过国家一级标准,青弋江某些河段TOC浓度已远远超过了二级标准。

The content of organic matter in ground environmental waters is an important indicator of the degree of organic pollution in waters. In order to understand the organic pollution and water quality in Yangtze River and Qingyi River in Wuhu section, inspecting the surrounding environment conditions and taking representative water samples along Yangtze River and Qingyi River in Wuhu section were done in this study. Total organic carbon content in water samples was determined by high temperature combustion-non-dispersive infrared absorption method. Based on them, the changes of TOC content and their impact factors in waters along Yangtze River and Qingyi River in Wuhu section were studied in this paper. The results showed that both waters along Yangtze River Water and Qingyi River in Wuhu section had a high level of TOC content, and the average value of TOC content in waters （except for some special sampling points） were （22.2±4.1） mg/L and （22.6±2.7） mg/L, respectively. The TOC content of some individual water samples from Qingyi River had exceeded the value of 40 mg/L. According to the national standard, the TOC content in waters of both Yangtze River and Qingyi River has exceeded the value of the standard Ⅰ, and TOC content of some sampling water from Qingyi River has exceeded the standard Ⅱ.