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971.
A.J. Wheeler I. Williams R.A. Beaumont R.S. Hamilton 《Environmental monitoring and assessment》2000,65(1-2):69-77
The personal exposure of children aged 9 – 11 years to particulate matter (PM10 and PM2.5) was carried out between January and September 1997 in the London Borough of Barnet. Personal sampling along with home, garden and classroom microenvironmental monitoring was completed for all ten children. Each child was monitored for five days during winter, spring and summer. All children completed daily time activity diaries to provide information on any potential activities that could influence their exposure to particulate matter. Each evening a household activity questionnaire was also completed by the parents. Personal Environmental Monitors were used to sample personal exposure to PM10 and PM2.5. Harvard Impactors were used for the microenvironmental sampling of both size fractions. The children's mean personal exposure concentrations for PM10 during winter, spring and summer were 72, 54 and 35 µg/m3 respectively and for PM2.5 22, 17 and 18 µg/m3 respectively. In order to determine the potential sources of particulate matter, analysis of the Teflon filters has been undertaken. The physical characteristics of the particles have been identified using Scanning Electron Microscopy. The relationships between personal exposure concentrations and the different microenvironments will be discussed. 相似文献
972.
环境空气中丙烯酸乙酯的气相色谱法测定 总被引:4,自引:1,他引:3
建立了环境空气中丙烯酸乙酯的TenaxGC吸附 -热解吸气相色谱测定方法。方法回收率为 87 3%~1 0 7 1 % ,变异系数为 5 3%~ 7 2 %。当采样体积为 2L时 ,检测限为 0 0 2mg/m3,具有采样时间短 ,不用任何溶剂等特点。 相似文献
973.
Stef Proost 《Integrated Assessment》2000,1(2):145-156
This paper surveys some recent studies on conventional air pollution and climate change in the transport sector in Europe.
Fuel efficiency standards, car emission standards and transport pricing instruments are analysed from an economic perspective
taking into account environmental and economic efficiency objectives.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
974.
975.
学龄儿童肺功能水平影响因素的研究 总被引:1,自引:0,他引:1
用逐步回归分析方法对与室内、外空气污染和机体状况等有关的因素对广州市学龄儿童肺功能 (FVC、FEV1 、PEFR和 FEF2 5~ 75 )水平的影响进行研究。结果提示 ,影响肺功能水平的主要因素是内因 ,身高的影响最明显 ,呼吸系统疾病或症状发生与肺功能水平下降有关 ;室外空气污染使肺功能水平下降 ,SO2 、NOx 和 PM2 .5 的影响明显 ,PM2 .5 的影响明显大于 PM1 0 和 TSP;居室或厨房通风不良、家庭烹饪用不洁燃料对儿童肺功能的生长不利 ;被动吸烟对女性儿童肺功能有不利影响。对各种影响因素 ,PEFR和 FEF2 5~ 75 比 FVC和 FEV1 更为敏感 相似文献
976.
977.
乌鲁木齐市电磁辐射污染的调查及分析 总被引:1,自引:0,他引:1
报道了乌鲁木剂市电磁辐射污染的调查结果,阐明了乌鲁木齐市电磁污染的现状和分析状况,并依据调查结果对各类污染源的电磁泄漏进行了分析讨论。 相似文献
978.
伊犁河伊宁市段水质污染特征分析 总被引:3,自引:1,他引:2
在对伊犁河伊宁市段历年水质状况进行综合评价的基础上,探讨了城市河段水质的变化规律、污染特征和成因。 相似文献
979.
克拉玛依市区大气尘污染研究 总被引:2,自引:0,他引:2
对克拉玛依市区大气尘污染的特征及变化规律进行了全面的分析和研究。结果表明,市区的尘污染有加重的趋势,降尘属中度污染,道路尘污 染也较严重。提出了一些具体的防治对策。 相似文献
980.
The Singrauli region in the southeastern part of Uttar Pradesh, India is one of the most polluted industrial sites of Asia.
It encompasses 11 open cast coalmines and six thermal power stations that generate about 7,500 MW (about 10% of India’s installed
generation capacity) electricity. Thermal power plants represent the main source of pollution in this region, emitting six
million tonnes of fly-ash per annum. Fly-ash is deposited on soils over a large area surrounding thermal power plants. Fly-ashes
have high surface concentrations of several toxic elements (heavy metals) and high atmospheric mobility. Fly ash is produced
through high-temperature combustion of fossil fuel rich in ferromagnetic minerals. These contaminants can be identified using
rock-magnetic methods. Magnetic susceptibility is directly linked to the concentration of ferromagnetic minerals, primarily
high values of magnetite. In this study, magnetic susceptibility of top soil samples collected from surrounding areas of a
bituminous-coal-fired power plant were measured to identify areas of high emission levels and to chart the spatial distribution
of airborne solid particles. Sites close to the power plant have shown higher values of susceptibility that decreases with
increasing distance from the source. A significant correlation between magnetic susceptibility and heavy metal content in
soils is found. A comparison of the spatial distribution of magnetic susceptibility with heavy-metal concentrations in soil
samples suggests that magnetic measurements can be used as a rapid and inexpensive method for proxy mapping of air borne pollution
due to industrial activity. 相似文献