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HOUSEHOLD CO AND PM LEVELS MEASURED AS PART OF A REVIEW OF CHINA'S NATIONAL IMPROVED STOVE PROGRAM

机译:在对中国国家改进炉灶计划的审查中测得的家庭CO和PM水平

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In 2001-03, a team of researchers from the US and China performed an independent, multidisciplinary review of China's National Improved Stove Program (NISP) programs carried out since the 1980s. As part of a 3500-household survey, a sub-sample of 396 rural households was monitored for PM4 in kitchens and living rooms over 24 hours, of which 159 were measured in both summer and winter. Carbon monoxide was measured in a 40% sub-sample. The results of this indoor air quality (IAQ) component indicate that for nearly all household stove or fuel groupings,PM4 levels were higher than-and sometimes more than twice as high as-the national standard for indoor air (150 μg PM10/m3). If these results are typical, then a large fraction of China's rural population is now chronically exposed to levels of pollution far higher than those determined by the Chinese government to harm human health. Further, we observed highly diverse fuel usage patterns in these regions in China, supporting the observations in the household survey of multiple stoves being present in many kitchens. Improved stoves resulted in reduced PM4 from biomass fuel combinations, but still not at levels that meet standards, and little improvement was observed in indoor pollution levels when other un-improved stoves were present in the same kitchen. Since many households change fuels according to daily and seasonal factors, resulting in different seasonal concentrations in living rooms and kitchens, assessing health implications from fuel use requires longitudinal evaluation of fuel use and IAQ levels, combined with accurate time-activity information.
机译:在2001-03年度,来自美国和中国的研究人员小组对1980年代以来实施的中国国家火炉计划(NISP)计划进行了独立的多学科评估。作为3500个家庭调查的一部分,在24小时内对396个农村家庭的子样本进行了厨房和客厅PM4监测,其中在夏季和冬季进行了159次测量。一氧化碳的含量为40%。该室内空气质量(IAQ)组件的结果表明,对于几乎所有家用火炉或燃料组,PM4含量都比室内空气的国家标准(150μgPM10 / m3)高,有时甚至高出两倍。 。如果这些结果是典型的,那么现在中国很大一部分农村人口长期受到的污染程度远高于中国政府确定的危害人类健康的程度。此外,我们在中国这些地区观察到了高度多样的燃料使用模式,这支持了对许多厨房中使用的多灶具的家庭调查中的观察结果。改进的灶具可降低生物质燃料组合物中的PM4含量,但仍未达到标准水平,而同一厨房中还存在其他未经改进的灶具,室内污染水平几乎没有改善。由于许多家庭会根据日常和季节性因素更换燃料,导致客厅和厨房的季节性浓度不同,因此评估燃料使用对健康的影响需要对燃料使用和室内空气质量水平进行纵向评估,并结合准确的时间活动信息。

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