Publications

@article{RIZK2016239,

title = {Fast sorption measurements of VOCs on building materials: Part 2 – Comparison between FLEC and CLIMPAQ methods},

author = {Malak Rizk and Marie Verriele and Maxence Mendez and Nadège Blond and Sébastien Dusanter and Coralie Schoemaecker and Patrice Blondeau and Stéphane Le Calvé and Nadine Locoge},

url = {http://www.sciencedirect.com/science/article/pii/S0360132315302146},

doi = {https://doi.org/10.1016/j.buildenv.2015.12.016},

issn = {0360-1323},

year  = {2016},

date = {2016-01-01},

journal = {Building and Environment},

volume = {99},

pages = {239 - 251},

abstract = {A new method was developed to measure on the field VOC sorption coefficients (ka; kd) on the surface of a material by coupling a Field and Laboratory Emission Cell (FLEC) to a Proton Transfer Reaction-Mass Spectrometer (PTR-MS) as presented in the first part of this study. In this second part, the method is compared to the classical method based on a CLIMPAQ chamber coupled to an on-line GC analyzer. Different models were used to determine the sorption parameters from experimental data taking into account the sink effect on empty chamber walls and the presence of a boundary-layer. Determined sorption equilibrium coefficients Ke (ka/kd) for a mixture of BTEX on a gypsum board was found to be in good agreement between both methods. However, the CLIMPAQ method seems to be less robust than the FLEC method in the determination of sorption coefficients since more than one couple of (ka; kd), showing the same ratio Ke can retrieve the same CLIMPAQ experimental data. Giving this result, the question arises about the reliability of the literature data determined using emission test chamber which could be one of the reasons behind the discrepancies found between experimental indoor concentrations and predicted ones using chamber derived parameters.},

keywords = {Building materials, CLIMPAQ, FLEC, Indoor air quality, Model, Sorption},

pubstate = {published},

tppubtype = {article}

}

@article{LIANG2015147,

title = {The influence of surface sorption and air flow rate on phthalate emissions from vinyl flooring: Measurement and modeling},

author = {Yirui Liang and Ying Xu},

url = {http://www.sciencedirect.com/science/article/pii/S1352231014009777},

doi = {https://doi.org/10.1016/j.atmosenv.2014.12.029},

issn = {1352-2310},

year  = {2015},

date = {2015-01-01},

journal = {Atmospheric Environment},

volume = {103},

pages = {147 - 155},

abstract = {This study investigated the influences of surface sorption and air flow rate on the emission of phthalates from building materials. Controlled tests were conducted in specially designed stainless steel and wood chambers, and the steady-state concentration in the stainless steel chamber was about 2–3 times higher than that in the wood chamber for di(2-ethylhexyl) phthalate (DEHP) and diisononyl phthalate (DINP). The emission rate of phthalates increased in the wood chamber due to the diffusion mass flow through the chamber wall (i.e., surface absorption). The adsorption isotherm of phthalates on the stainless steel surface and the absorption parameters (i.e., diffusion and partition coefficients) of phthalates on the wood surface were determined experimentally, and the values were comparable to those in the literature. The equilibration time scale for phthalates absorbed to the sink reservoir in actual indoor environments was estimated and can be substantial (approximately 80 years), indicating that surface absorption may continuously drive phthalates from their indoor sources to various sinks and thus significantly increase the emission rate of phthalates. The gas-phase concentration of DEHP was measured in two stainless steel chambers operated at flow rates of 300 mL/min and 3000 mL/min, respectively, which were both adjusted to 1000 mL/min after steady state was reached. The gas-phase concentration of DEHP in the chamber was very sensitive to the chamber air flow rate, and higher air flow rates resulted in lower concentration levels. However, the increased emission rate compensated for the dilution in the gas phase and made the DEHP concentration not drop substantially with an increase in the air flow rate. Independently measured or calculated parameters were used to validate a semi-volatile organic compounds (SVOCs) emission model that included absorptive surfaces and for a range of air flow rates, with excellent agreement between the model predictions and the observed chamber concentrations of phthalates.},

keywords = {Air flow rate, Chamber test, Model, Phthalates, Surface absorption, SVOCs},

pubstate = {published},

tppubtype = {article}

}