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首页> 外文期刊>Environmental Science & Technology: ES&T >Early-Stage Emissions of Formaldehyde and Volatile Organic Compounds from Building Materials:Model Development,Evaluation,and Applications
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Early-Stage Emissions of Formaldehyde and Volatile Organic Compounds from Building Materials:Model Development,Evaluation,and Applications

机译：Early-Stage Emissions of Formaldehyde and Volatile Organic Compounds from Building Materials:Model Development,Evaluation,and Applications

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摘要

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.

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