Pôle RIME-C2MA, Ecole des Mines d'Alès, Hélioparc, 2 Avenue Pierre Angot, 64053, Pau, Cedex 9, France.
Laboratoire Thermique Energétique et Procédés, Université de Pau et des Pays de l'Adour, BP 7511-64053, Pau, France.
Environ Sci Pollut Res Int. 2017 Nov;24(31):24156-24166. doi: 10.1007/s11356-017-0025-z. Epub 2017 Sep 7.
Basing on the material emission data obtained in a test chamber, chemical mass balance (CMB) was used to assess the source apportionment of volatile organic compound (VOC) concentrations in three newly built timber frame houses. CMB has been proven to be able to discriminate the source contributions for two contrasted environmental conditions (with and without ventilation). The shutdown of the ventilation system caused an increase in the VOC concentrations due to the increased contribution of indoor surface materials like the door material and furniture explaining together over 65% of total VOCs. While the increase in formaldehyde concentration is mainly due to furniture (contribution of 70%), the increase in α-pinene concentration is almost exclusively attributable to the emission of door material (up to 84%). The apportionment of VOC source contributions appears as highly dependent on the position of source materials in the building (surface materials or internal materials) and the ventilation conditions explaining that the concentrations of compounds after the shutdown of ventilation system do not increase in equivalent proportion. Knowledge of indoor sources and its contributions in real conditions may help in the selection of materials and in the improvement of construction operations to reduce the indoor air pollution.
基于在测试室内获得的物质排放数据，使用化学质量平衡（CMB）来评估三个新建木质框架房屋中挥发性有机化合物（VOC）浓度的源分配。CMB 已被证明能够区分两种对比环境条件（通风和不通风）的源贡献。通风系统的关闭导致 VOC 浓度增加，因为室内表面材料（如门材料和家具）的贡献增加，解释了总 VOC 的 65%以上。虽然甲醛浓度的增加主要是由于家具（贡献 70%），但 α-蒎烯浓度的增加几乎完全归因于门材料的排放（高达 84%）。VOC 源分配的贡献似乎高度依赖于源材料在建筑物中的位置（表面材料或内部材料）和通风条件，这解释了通风系统关闭后化合物的浓度不会以相同的比例增加。了解实际条件下的室内来源及其贡献可能有助于选择材料和改进施工操作，以减少室内空气污染。
