北京市朝阳区局部地区环境空气质量调查

Survey on Ambient Air Quality of Some Area in Chaoyang District,Beijing

目的通过对北京市朝阳区局部地区的环境空气质量状况调查,为有关部门对北京市类似区域的环境空气质量的监督、评价和治理提供可靠的科学数据。方法选择北京市朝阳区的朝阳公园、大北窑、东直门3个地区,每日监测4个时段(8:00,12:00,16:00,20:00),连续5d,测定该区域的环境空气中可吸入颗粒物(PM10)、CO、NO2、SO2、负离子浓度等5项环境指标的日均值。结果3个地区空气中的CO和SO2的日平均浓度均低于GB/T3095-1996《环境空气质量标准》二级标准限值。东直门地区空气中NO2日平均浓度有2d偏高,超过二级标准限值0.01mg/m3。3个地区空气中PM10的日平均浓度都分别各有2d偏高,分别超过二级标准限值0.01～0.04mg/m3。结论通过对北京市朝阳区3个地区的环境空气质量状况监测,并对污染来源进行了初步分析,有关部门可根据上述地区的空气质量数据结合气象因素进行有针对性的监督和治理。

Objective To provide reliable and scientific data for supervision assessment and control of regional ambient air quality in Beijing through the investigation of ambient air quality in Chaoyang District. Methods Three local regions of Chaoyang Park Dabeiyao and Dongzhimen were selected as the measurement areas the determinations of air quality of consecutive 5 days and 4 times a day8 00 12 00 16 00 20 00 were conducted 6 items were included PM10 CO NO2 SO2 and negative ion concentration. Results The daily averages of CO and SO2 were lower than level 2 standard limitation for 5 days’ measurement in 3 regions. 2 of 5 days the daily average of NO2 in Dongzhimen exceeded the standard limitation0.01 mg/m3. 2 of 5 days the daily average of PM10 in 3 regions exceeded the standard limitation  0.01- 0.04 mg/m3. Conclusion Preliminary analysis was carried out based on ambient air quality data in 3 local regions the air pollution often emerged on some days in Beijing. The supervision and control should be conducted according to the characters of regional environmental quality pollution and meteorology.