共查询到10条相似文献,搜索用时 31 毫秒
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针对沈阳市5家大型超市监测,结果显示在9项共48个超标数据中有41个集中在二氧化碳、温度、苯并(a)芘和总挥发性有机物等4项指标中。其中二氧化碳超标最为普遍,超标率为64.0%;温度超标率为40.0%;苯并(a)芘超标率为36.0%;总挥发性有机物超标率为24.0%;苯、甲苯和二甲苯超标率分别为4.0%8、.0%和4.0%;氨超标率为8.7%;甲醛超标率为4.2%。 相似文献
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采用Airpak软件模拟研究在通风速率、源项强度和源项面积多因素作用下的室内甲醛扩散规律。结果表明,在室内甲醛初始为零时,源项散发甲醛后,在2000 s内室内甲醛浓度升高较快,之后处于平衡状态。在通风速率加倍时甲醛最高浓度降低56%,源项强度减半时甲醛最高浓度降低16%,源项散发面积减少37%时甲醛最高浓度降低24%。说明通风速率对室内甲醛浓度的影响最大,其次依次为源项散发面积和源项强度。 相似文献
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Diapouli E Chaloulakou A Mihalopoulos N Spyrellis N 《Environmental monitoring and assessment》2008,136(1-3):13-20
Simultaneous indoor and outdoor PM10 and PM2.5 concentration measurements were conducted in seven primary schools in the Athens area. Both gravimetric samplers and continuous
monitors were used. Filters were subsequently analyzed for anion species. Moreover ultrafine particles number concentration
was monitored continuously indoors and outdoors. Mean 8-hr PM10 concentration was measured equal to 229 ± 182 μg/m3 indoors and 166 ± 133 μg/m3 outdoors. The respective PM2.5 concentrations were 82 ± 56 μg/m3 indoors and 56 ± 26 μg/m3 outdoors. Ultrafine particles 8-h mean number concentration was measured equal to 24,000 ± 17,900 particles/cm3 indoors and 32,000 ± 14,200 particles/cm3 outdoors. PM10 outdoor concentrations exhibited a greater spatial variability than the corresponding PM2.5 ones. I/O ratios were close or above 1.00 for PM10 and PM2.5 and smaller than 1.00 for ultrafine particles. Very high I/O ratios were observed when intense activities took place. The
initial results of the chemical analysis showed that accounts for the 6.6 ± 3.5% of the PM10 and for the 3.1 ± 1.4%.The corresponding results for PM2.5 are 12.0 ± 7.7% for and 3.1 ± 1.9% for . PM2.5
indoor concentrations were highly correlated with outdoor ones and the regression line had the largest slope and a very low
intercept, indicative of no indoor sources of fine particulate . The results of the statistical analysis of indoor and outdoor concentration data support the use of as a proper surrogate for indoor PM of outdoor origin. 相似文献
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杨满芽 《环境监测管理与技术》2003,15(3):20-20,43
介绍了GB/T18883—2002《室内空气质量标准》的特点,对标准强制执行的实施主体、项目间的相关性和可操作性进行了讨论。 相似文献
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室内空气有机污染的研究现状 总被引:12,自引:1,他引:12
主要讨论了室内空气中有机物污染的研究现状。重点介绍了室内空气中多环芳烃 (PAHs)、挥发性有机物(VOCs)、醛类化合物等的污染状况及来源。简要叙述了室内空气污染的影响因素及对人体的健康风险评价。 相似文献
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分析了我国居住建筑室内PM_(2.5)污染水平,总结了现阶段PM_(2.5)的研究方法,主要包括理论分析法、数值模拟法和实验测试法。指出室外源是室内PM_(2.5)的主要污染来源,而室内烟草烟雾、烹饪及人员活动也会严重影响室内PM_(2.5)浓度。针对目前研究中存在的问题,提出了标定典型建筑在不同影响因素下的I/O比范围、研究家具和家电的颗粒物释放状况、加强农村室内外空气颗粒物污染调查等建议。 相似文献