某港口工业区大气质量监测分析

Ambient air quality in industrial harbor area

目的了解河北省唐山市某港口工业区部分投产期间的大气污染状况,为进行连续性环境监测和环境科学研究提供基础资料。方法采用功能分区布点,在工业区内的钢铁厂、电厂、原油码头、矿石码头、煤炭码头和对照区采集大气样品,测定SO2、NO2、CO、O3、总悬浮颗粒物(TSP)和可吸入颗粒物(PM10)等指标,计算各采样点大气质量综合指数。结果各采样点以及整个工业区空气中各种污染物浓度均未超标;与对照区(0.193 mg/m3)比较,煤炭码头区TSP浓度(0.416 mg/m3)较高,差异有统计学意义(P<0.05);钢铁厂、电厂、原油码头、矿石码头、煤炭码头污染区的大气质量综合指数分别为0.486、0.451、0.350、0.314、0.475,空气质量分级均为I级,空气质量清洁。结论某港口工业区空气质量分级为I级,大气质量状况为清洁。

Objective To assess the air quality in an industrial harbor area located in Tangshan city in order to provide fundamental data for carrying out continuous environmental monitoring.Methods According to the construction status and the distributions of pollution sources in the area,steel factory,power plant,crude oil dock,ore dock,coal dock,and control area were chosen as the sampling area.The concentrations of SO2,NO2,CO,O3,total suspended particulate（TSP） and particulate matter10m（PM10） in the ambient air were determined.The air quality of each area selected and of the whole industrial area were assessed by calculating the integrated air pollution index.Results The concentrations of all air pollutants in each area as well as in the whole industrial area were lower than the maximum acceptable level defined by standards for environmental air quality.Compared with the control area,the concentration of TSP of coal dock was higher with a significant difference（0.416 vs 0.193 mg/m3,P0.05）.The integrated air pollution indexes for ambient air of steel factory,power plant,crude oil dock,ore dock,and coal dock were 0.486,0.451,0.350,0.314,and 0.475,respectively.Air quality index of each area and the whole industrial area were all lower than 0.49,and the quality of the ambient air was grade Ⅰ,which belonged to clean air.Conclusion The ambient air quality of the industrial harbor area was clean and belonged to grade Ⅰ.