Research on the VOC/SVOC Emission Analytical Model and Parameter Measurement Method
The impact of emitted volatile organic compounds(VOC)and semi-volatile organic compounds(SVOC)from indoor building materials and furniture cannot be ignored.This study firstly establishes a unified analytical model to describe the emissions of VOC/SVOC from materials,which is helpful for the achievement of general characterization of source/sink behaviors and the integrated control of pollutants.A hybrid optimization method is used to measure the three key parameters in the model,including the initial emittable concentration(C0),diffusion coefficient(Dm),material/air partition coefficient(Km),and surface/air partition coefficient(Ks).Data of VOC emissions from a solid wood furniture and SVOC emissions a flame retardant in literature are used to verify the validity of the model and method.Moreover,the impact of long-term SVOC emission on the gas-phase concentration along the material surface(y0)at different temperatures is analyzed.Results indicate that,with the increase of temperature or emission time,it is more appropriate to use C0 as a key emission parameter,rather than the widely used y0 in prior studies.
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