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首页> 外文期刊>Environmental Science & Technology >Long-Term Formaldehyde Emissions from Medium-Density Fiberboard in a Full-Scale Experimental Room: Emission Characteristics and the Effects of Temperature and Humidity
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Long-Term Formaldehyde Emissions from Medium-Density Fiberboard in a Full-Scale Experimental Room: Emission Characteristics and the Effects of Temperature and Humidity

机译：大型实验室中密度纤维板的长期甲醛排放：排放特性以及温度和湿度的影响

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摘要

We studied formaldehyde emissions from the medium-density fiberboard (MDF) in a full-scale experimental room to approximate emissions in actual buildings. Detailed indoor formaldehyde concentrations and temperature and humidity data were obtained for about 29 months. Temperature, relative humidity (RH), and absolute humidity (AH) ranged over -10.9-31.4 ℃, 46.5-83.6%, and 1.1-23.1 g/kg_(ak), respectively. Annual cyclical seasonal variations were observed for indoor formaldehyde concentrations and emission rates, exhibiting entirely different characteristics than those in an environmental chamber under constant environmental conditions. The maximum concentration occurred in summer rather than at initial introduction of the material. The concentrations in summer could be a few up to 20 times higher than that in winter, depending on the indoor temperature and humidity conditions. Concentrations decreased by 20-65% in corresponding months of the second year. Indoor formaldehyde concentrations were positively correlated with temperature and AH but were poorly correlated with RH. The combined effects of temperature and AH on formaldehyde emissions from MDF in actual buildings were verified. These detailed long-term experimental results could be used with environmental chamber measurement data to scale up and validate emission models from chambers held at constant conditions to actual buildings.
机译：我们在一个大型实验室中研究了中密度纤维板（MDF）的甲醛排放量，以估算实际建筑物中的甲醛排放量。获得了大约29个月的详细室内甲醛浓度以及温度和湿度数据。温度，相对湿度（RH）和绝对湿度（AH）分别在-10.9-31.4℃，46.5-83.6％和1.1-23.1 g / kg_ak的范围内。观察到室内甲醛浓度和排放速率的年度周期性季节性变化，与在恒定环境条件下的环境室内的甲醛表现出完全不同的特性。最大浓度发生在夏天，而不是最初引入该物质时。根据室内温度和湿度条件，夏季的浓度可能比冬季高20倍。第二年相应月份的浓度下降了20-65％。室内甲醛浓度与温度和AH呈正相关，但与RH呈弱相关。验证了温度和AH对实际建筑中MDF甲醛释放量的综合影响。这些详细的长期实验结果可与环境室测量数据一起使用，以放大并验证从保持恒定条件的室到实际建筑物的排放模型。

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  • 来源
    《Environmental Science & Technology》 |2015年第17期|10349-10356|共8页
  • 作者

    Weihui Liang; Shen Yang; Xudong Yang;

  • 作者单位

    Department of Building Science, Tsinghua University, Beijing 100084, P. R. China;

    Department of Building Science, Tsinghua University, Beijing 100084, P. R. China;

    Department of Building Science, Tsinghua University, Beijing 100084, P. R. China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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  • 正文语种 eng
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