| Title: | "Early-Stage Emissions of Formaldehyde and Volatile Organic Compounds from Building Materials: Model Development, Evaluation, and Applications" |
| Author(s): | Liu N; Zhang X; Wang L; Liang K; Zhang Y; Cao J; |
| Address: | "Department of Building Science, Tsinghua University, Beijing 100084, China. Beijing Key Laboratory of Indoor Air Quality Evaluation and Control, Beijing 100084, China. School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, China. Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou 510006, China" |
| ISSN/ISBN: | 1520-5851 (Electronic) 0013-936X (Linking) |
| Abstract: | "Emissions of formaldehyde and volatile organic compounds (VOCs) from building materials may result in poor indoor air quality. The emission process can be divided into three stages over time: early, transition, and equilibrium stages. In existing studies, mass transfer models without distinguishing the early and transition stages have been widely used for characterizing the formaldehyde/VOC emissions, with three key parameters involved in these models. Many methods have been proposed for determining these parameters by fitting the corresponding models to experimental data. However, multiple groups of best-fit parameters might coexist if experimental data are obtained at the early stage (to shorten the experimental time). Therefore, we developed a novel mass transfer model to describe the early-stage emissions by assuming the building material as semi-infinite medium. The novel model indicated that the early-stage emission was governed by only two parameters, instead of three parameters, which explained the reason for the multi-solution problem of existing methods. Subsequently, the application condition of the early-stage model was clarified, showing that the early stage was very common in the emissions of formaldehyde/VOCs. Finally, a novel approach for characterizing the emissions of formaldehyde/VOCs from building materials was proposed to eliminate the negative effects of the multi-solution problem" |
| Keywords: | "*Air Pollution, Indoor/analysis Construction Materials Formaldehyde/analysis *Volatile Organic Compounds emission characterization indoor air pollution indoor air quality mass transfer analysis semi-infinite medium;" |
| Notes: | "MedlineLiu, Ningrui Zhang, Xu Wang, Luyang Liang, Kai Zhang, Yinping Cao, Jianping eng Research Support, Non-U.S. Gov't 2022/09/17 Environ Sci Technol. 2022 Oct 18; 56(20):14680-14689. doi: 10.1021/acs.est.2c04572. Epub 2022 Sep 16" |
