Modelling and testing of VOC source suppression effect of building materials modified with adsorbents
Modelling and testing of VOC source suppression effect of building materials modified with adsorbents
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吸附剂改性建筑材料VOC源抑制效果建模与测试
DOI：
10.1016/j.buildenv.2019.03.003
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发表时间：
2019-05
影响因子：
7.4
通讯作者：
Jiaping Liu
中科院分区：
文献类型：
--
作者：
Xiaojun Zhou;Yanfeng Liu;Cong Song;Xinke Wang;Fenghao Wang;Jiaping Liu
装饰建材排放的挥发性有机物是室内空气污染的主要来源，危害人体健康。源头控制是减少材料中有害物质排放量的最直接方法。鉴于吸附剂对VOC分子的优异吸附性能和有效固定，可将少量吸附剂掺入到建筑材料生产所用的原材料中，从而制造出低VOC排放的改性建筑材料。根据附加吸附剂的类型和比例，改性建筑材料的VOC排放特性各不相同。在分析多组分多尺度传质机理的基础上，提出了一种改性建筑材料VOC排放特性预测系统。采用木质活性炭（WAC）、贝壳活性炭（SAC）、椰壳活性炭（CSAC）和高锰酸钾浸渍氧化铝（PIA）4种吸附剂制备改性中密度纤维板。并通过孔结构表征试验和环境箱试验验证了理论预测系统的准确性。结果表明，分配系数越大的吸收剂，其源抑制效果越显著。所提出的改性建筑材料VOC排放特性预测系统可以优化工程应用中吸附剂的种类和配比，从而为选择有效的VOC源控制策略提供依据。
Volatile organic compounds (VOCs) emitted from decorative building materials are the main source of indoor air pollution, which endangers human health. Source control is the most direct method to reduce the amount of harmful substances emitted from a material. In view of the excellent adsorption performance and effective fixation of the adsorbent on VOC molecules, small amounts of adsorbents can be blended into the raw materials used in the production of building materials, which results in the manufacture of modified building materials with low VOC emissions. According to the type and ratio of additional adsorbents, the VOC emission characteristics of the modified building materials vary. Based on the analysis of the multi-component and multi-scale mass transfer mechanism, a prediction system for the VOC emission characteristics of modified building materials was proposed. Four types of adsorbents, namely, wood-based activated carbon (WAC), shell activated carbon (SAC), coconut shell activated carbon (CSAC), and potassium permanganate impregnated alumina (PIA) were used to manufacture the modified medium density fiberboards. Moreover, pore structure characterization tests and environmental chamber tests were conducted to verify the accuracy of the theoretical prediction system. The results revealed that an absorbent with a high partition coefficient has a more significant source suppression effect. The proposed VOC emission characteristic prediction system for modified building materials can optimize the type and ratio of adsorbents for engineering applications and therefore, provide a basis for the selection of effective VOC source control strategies.
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