Development of a general dynamic Multimedia Indoor Model for SVOCs: Applications to PBDEs
نویسنده
چکیده
An unsteady-state, fugacity-based, indoor chemical fate model was developed to explore kinetic resistance of multilayer of polyurethane foam (PUF) commonly found in upholstered furniture. The Dynamic Layered PUF Simplified Multimedia Indoor Model (DLP-sMIM) was based on the Multimedia Indoor Model created by Zhang et al. (Zhang, Diamond et al. 2009). DLP-sMIM was applied to real and hypothetical scenarios indoor environments consisting of air, carpet, PUF furniture and the surface film on walls. The model showed good agreement with reported concentrations from a study of indoor polybrominated diphenyl ethers (PBDE) air concentrations over nine months. The PUF compartment was predicted to experience long PBDE residence time. It is suggested that steady-state models and using the well-mixed assumption for a single PUF compartment causes an orders-of-magnitude overestimation of the mass of chemicals in PUF. Rather, two vertical layers of PUF need to be considered in a time-dependent model of indoor chemical fate.
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تاریخ انتشار 2015