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目的研究重庆市九龙坡区某焦化厂苯并[a]芘(benzo[a]pyrene,B[a]P)污染状况。方法于2008年9月采用高效液相色谱法对焦化厂焦炉作业环境空气中B[a]P浓度进行了分析测定;采用B[a]P快速测量仪对焦化厂周围不同距离区域以及周边不同功能区各季度的B[a]P浓度进行了实时监测和分析。结果焦炉作业环境空气中B[a]P的浓度依次为焦炉顶部>焦炉侧面>焦炉底部。焦炉底部、焦炉侧面和焦炉顶部的B[a]P浓度随着采样时间的延长有逐步升高的趋势,差异有统计学意义(P<0.05);距离焦化厂越近的区域B[a]P的浓度越高,差异有统计学意义(P<0.05);焦化厂B[a]P浓度一季度较高,三季度浓度较低。焦化厂一、二、三、四季度的B[a]P浓度均明显高于周边功能区,差异有统计学意义(P<0.05)。结论焦化厂的生产性排放是空气中B[a]P污染的重要来源,距离焦化厂越近的区域B[a]P的浓度越高。
Objective To study the pollution of benzo [a] pyrene (B [a] P) in a coking plant in Jiulongpo District of Chongqing. Methods The concentration of B [a] P in the ambient air of coke oven operation in coking plant was analyzed and determined by HPLC in September, 2008. The B [a] P rapid measuring instrument was used to measure the concentration of B [a] The concentrations of B [a] P in different quarters of different functional areas were monitored and analyzed in real time. Results The concentration of B [a] P in the air of the coke oven operating environment was, in order, the top of the coke oven> the side of the coke oven> the bottom of the coke oven. The concentration of B [a] P at the bottom of the coke oven, the side of the coke oven and the top of the coke oven tended to increase gradually with the increase of sampling time (P <0.05). The closer the area B The concentration of [a] P was higher, the difference was statistically significant (P <0.05). The concentration of B [a] P in coking plant was higher in the first quarter and lower in the third quarter. The concentration of B [a] P in the first, second, third and fourth quarters of the coking plant was significantly higher than that in the surrounding functional areas (P <0.05). Conclusion The productive emissions of coking plant is an important source of B [a] P pollution in the air, and the concentration of B [a] P in the area closer to the coking plant is higher.