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[目的]了解室内空气颗粒污染物污染水平及变化趋势。[方法]于2012年9月至2013年8月工作日期间在济南市某办公场所采用LD-5C(B)微电脑激光粉尘仪对室内空气颗粒物PM10、PM2.5进行监测。每间隔1 h采样,每次采样5 min,计算日平均浓度。[结果]济南市某办公场所室内颗粒物PM10、PM2.5年均浓度分别为0.112 mg/m3、0.078 mg/m3;1月、2月、6月、7月和10月期间室内颗粒物浓度较高;第一季度室内PM2.5浓度高于其他季度(H=10.829,P=0.013),PM10浓度在各季度间差异无统计学意义(H=7.284,P=0.063);采暖季节(当年11月15日至次年3月15日)PM2.5浓度高于非采暖季节(Z=-2.368,P=0.018),PM10浓度差异无统计学意义(Z=-0.927,P=0.354);采暖季节和非采暖季节PM2.5/PM10值分别为0.79和0.65,差异有统计学意义(Z=-4.897,P=0.000)。[结论]济南市某办公场所室内颗粒物污染较重,室内颗粒物浓度呈季节变化趋势,采暖对室内细颗粒物PM2.5浓度影响较大。
[Objective] To understand the pollution level and change trend of indoor air particle pollutants. [Method] The PM-PM10 and PM2.5 in indoor air were monitored by LD-5C (B) microcomputer laser dust analyzer during a working day from September 2012 to August 2013 in a certain office in Jinan. Every 1 h sampling, sampling 5 min each, calculate the average daily concentration. [Result] The average concentration of indoor PM10 and PM2.5 was 0.112 mg / m3 and 0.078 mg / m3 in a certain office in Jinan. The concentration of indoor PM in January, February, June, July and October was higher ; PM2.5 concentration in the first quarter was higher than that in the other quarters (H = 10.829, P = 0.013), and there was no significant difference in PM10 concentration between the three quarters (H = 7.284, P = 0.063) (Z = -2.368, P = 0.018), there was no significant difference in PM10 concentration between the 15th and the 15th of March next year (Z = -0.927, P = 0.354) And PM2.5 / PM10 values in non-heating season were 0.79 and 0.65, respectively, with significant difference (Z = -4.897, P = 0.000). [Conclusion] The indoor particulate matter in a certain office in Jinan was seriously polluted and the indoor particulate matter concentration showed a seasonal change trend. Heating had a great influence on the indoor PM2.5 concentration.