搜索结果: 16-30 共查到“工学 PM10”相关记录58条 . 查询时间(0.015 秒)
兰州市大气PM10中重金属和多环芳烃的健康风险评价
重金属 多环芳烃 健康风险评价
2013/11/8
以现场采样监测和问卷调查方式,结合美国环保局推荐的健康风险评价模型,对兰州市大气PM10中重金属、PAHs及其健康风险进行了研究.结果表明:兰州市大气PM10中重金属和PAHs具有明显的季节特征,冬季高于夏季;人群对重金属和PAHs的日均暴露剂量在9.60×10-5~1.06×10-3 mg·kg-1·d-1之间,儿童的日均暴露剂量高于成人,男性高于女性;Zn和4环及4环以上的PAHs对总暴露剂量...
利用中流量采样器收集忻州市采暖季和非采暖季4个监测点位的PM10和TSP样品，通过离子色谱法测定SO42-、NO3-和Cl-的质量浓度，并以此3种水溶性阴离子的时空分布、相关性参数和特征比值来探讨其在环境空气中的污染特征和来源.结果表明，采暖季PM10和TSP中3种水溶性阴离子的总质量浓度分别为14.24 μg·m-3和21.97 μg·m-3，明显高于非采暖季（分别为8.56 μg·m-3和11...
我国城市间大气污染物的相互输送作用非常显著.舟山市大气污染物主要来源于长三角地区，本地源影响较小.因此，本文将以舟山市为例，应用频度统计分析方法，研究舟山市大气PM10污染演化宏观动态的统计分布规律.结果发现，舟山市大气PM10小时平均浓度的波动并非随机，而是在0.065~0.324 mg·m-3范围内具有标度不变特征，统计上服从典型的分形幂律分布.同时，为了阐明该分形幂律分布的产生动力机制，基于...
目的：探讨北京市大气颗粒物（PM10及PM 2.5）污染对居民循环系统疾病死亡的影响。方法：连续监测2007年至2008年北京市大气中PM 2.5日均浓度，并收集同时期海淀区居民循环系统疾病死亡数据、北京市大气污染物和气象条件资料，应用双向对称性病例交叉研究和条件Logistic回归对数据进行分析，同时调整了性别、年龄及季节等潜在混杂因素的影响。
为分析近10 年来中国PM10污染时空格局演变，运用统计学和GIS 方法对2002-2012 年PM10监测数据进行分析，结果表明：① 地级及以上城市ρ（PM10）年均值由0.130 mg·m-3下降至0.076 mg·m-3，达标城市比例由37.6%上升至92.0%；环保重点城市ρ（PM10）日均值超标天数比例由24.7%下降至7.0%。② 12 月份PM10污染最重，其次为1 月和11 月；8...
Decrease of TSP, PM10, and Lead Concentration in a Lead Company in Alexandria City, Egypt
Air Pollution TSP-PM10-Lead-Dry Wet Filters
2013/3/8
The study was carried out in a lead company inside Alexandria which exists in a residential area. Different sites have been selected inside the Department of Lead Improvement to measure TSP, PM10, and...
Source Characterization and Apportionment of PM10, PM2.5 and PM0.1 by Using Positive Matrix Factorization
ositive matrix factorization Enrichment factor analysis Conditional probability function analysis
2016/3/25
Ambient Particulate Matters (PM10, PM2.5 and PM0.1) were investigated at Shinjung station in New Taipei City, Taiwan.
Samples were collected simultaneously using a dichotomous sampler (Andersen Model...
龙岩市大气中PM10的微观形貌特征及组成分析
PM10 扫描电镜 X射线能谱 CMB受体模型
2012/11/12
选择福建省龙岩市环境监测站的大气常规监测点位为采样点, 于2009年9月16日至9月23日进行24 h连续采样, 采用扫描电镜方法分析样品中PM10的微观形貌特征和元素组成, 通过与当地典型污染源颗粒物的微观形貌和特征元素进行对比, 确定其主要污染来源. 研究结果表明: 各类污染源的微观形貌及特征元素均有明显区别, 不同采样点样品中PM10的微观形貌特征及元素组成也有差异, 据此分析得出的大气P...
Source Apportionment of PM10 in Four Cities of Northeastern China
Source apportionment PM10 Chemical mass balance Cities of northeastern China
2016/3/25
Ambient particulate matter with the aerodynamics diameter less than 10 􀈝m (PM10) was sampled in four northeastern
Chinese cities (Shenyang, Anshan, Fushun and Huludao) from August 2001 to Au...
Potential Source Analysis for PM10 and PM2.5 in Autumn in a Northern City in China
Sources Potential source contribution function PM10 PM2.5
2016/3/28
In this study, PM10 and PM2.5 samples were obtained in a northern city in China. The 12-h averaged concentrations of
particulate matter and species were analyzed. A PCA-MLR model was applied to ident...
Variability of Urban Aerosols over Santiago, Chile: Comparison of Surface PM10 Concentrations and Remote Sensing with Ceilometer and Lidar
Aerosols Lidar Ceilometer PM10 Santiago Chile
2016/3/28
Lidar instruments have proven useful for characterizing the structure and dynamics of aerosol layers. We compare here
the diurnal, seasonal and vertical variability of urban aerosols as described by ...
沙尘 ＰＭ１０质量浓度与气温的关系初探
气温 沙尘 ＰＭ１０浓度 统计关系
2013/1/28
利用甘肃民勤自动气象站观测的 ２００４～２００６年夏季的 ５ｍｉｎ一次的气温与沙尘 ＰＭ１０浓度资料，通过将数据分为实验组与对照组，研究了气温与沙尘天气之间的统计关系。个例显示，气温与沙尘 ＰＭ１０浓度之间存在降温、升温和混合型 ３种对应关系。实验组统计分析表明，气温及其变化（每 ５ｍｉｎ间隔气温变化绝对值和每 ２４ｈ间隔气温变化绝对值）与沙尘 ＰＭ１０浓度及其变化呈现出非常显著的正相关关系；沙尘...
2009年12月14日—28日采集了新疆农业大学校园PM10和PM2.5样品，分析了重金属Cd的形态和风险指数。该采样点在冬季采暖期间PM10及PM2.5污染非常严重，PM10和PM2.5中Cd的含量分别为3.642和1.964 ng·m-3，均以残渣态为主，但PM2.5中Cd的生物有效性高于PM10中Cd的生物有效性。PM10中Cd的致癌风险为6.56×10-6，而PM2.5中Cd的致癌风险为3...
Exposure to PM10, PM2.5, PM1 and Carbon Monoxide on Roads in Lahore, Pakistan
Pakistan Particulate matter Carbon monoxide Exposure Air pollution
2016/3/28
Particulate matter pollution is one of the major environmental concerns in Pakistan. Over the past 20 years there has
been a considerable increase in the number of motor vehicles. The present study w...