北塘排污河天津中心城区段恶臭污染调查与分析研究

为研究天津市中心城区北塘排污河恶臭污染特征,沿北塘排污河布设5个采样点位,分别在夏、秋、冬三季进行了系统采样.北塘排污河夏、秋、冬三季总检出浓度为23.842 5 mg/m^3,夏季（9.273 1mg/m^3）＞冬季（8.388 4 mg/m^3）＞秋季（6.181 0 mg/m^3）,靖江桥和兵营桥两个点位受赵沽里泵站出水水质的影响较大,对周围的恶臭污染程度更为严重.北塘排污河污染物质总检出浓度组成特征：无机气体＞含氧烃＞烷烃＞芳香烃＞卤代烃＞烯烃＞硫化物,共检出物质67种,检出率大于70％的污染物共30种,广泛存在的物质为11种,主要恶臭污染物为少量的含氧烃、无机气体和硫化物,乙醛、丙酮、硫化氢和甲硫醇为北塘排污河主要恶臭污染物.

The Characterization of Odor Pollution in Typical Sewage Channelof Tianjin Central Urban Area

In order to study the characteristics of odor pollution in Beitang sewage channel of Tianjin central area, 5 sampling points were distributed along the sewage channel and systematic sampling was carried out in summer, autumn and winter, respectively. The total concentration is 23. 842 5 mg/m^3, in the order of Summer（9. 273 1 mg/m^3） 〉 Winter（8. 388 4 mg/m^3 ） 〉 Autumn（6. 181 0 mg/m^3 ）. The influence of odor pollution on ambient environment is more serious in Jingjiangqiao and Bingyingqiao. The composition characteristics of the matter are as follows ： Inorganic gases 〉 Oxygenated hydrocarbons 〉 alkanes 〉 Aromatic hydrocarbon 〉 Halogenated hydrocarbon 〉 olefin 〉 sulfide. 67 kinds of substances were detected in which there are 30 kinds with the detection rate of over 70%. Finally, 11 kinds of substances were identified as widespread. The main odor substances are including Oxygenated hydrocarbons, Inorganic gases and sulfide, Acetaldehyde, acetone, hydrogen sulfide and methyl mercaptanare identified as the typical odor pollutants in Beitang sewage channel.