IPREM, IMT Mines Ales, Universite de Pau et des Pays de l'Adour, E2S UPPA, CNRS, Pau, France.
Universite de Pau et des Pays de l'Adour, E2S UPPA, Pau, France.
Indoor Air. 2020 Nov;30(6):1256-1267. doi: 10.1111/ina.12704. Epub 2020 Jul 7.
Indoor surfaces may be adsorptive sinks with the potential to change Indoor Air Quality. To estimate this effect, the sorption parameters of formaldehyde and toluene were assessed on five floorings by an experimental method using solid-phase microextraction in an airtight emission cell. Adsorption rate constants ranged from 0.003 to 0.075 m·h , desorption rate constants from 0.019 to 0.51 h , and the partition coefficient from 0.005 to 3.9 m, and these parameters vary greatly from one volatile organic compound/material couple to another indicating contrasted sorption behaviors. A rubber was identified as a sink of formaldehyde characterized by a very low desorption constant close to 0. For these sorbent floorings identified, the adsorption rates of formaldehyde are from 2 to 4 times higher than those of toluene. Two models were used to evaluate the sink effects of floorings on indoor pollutant concentrations in one room from different realistic conditions. The scenarios tested came to the conclusion that the formaldehyde sorption on one rubber (identified as a sink) has a maximum contribution from 15% to 21% for the conditions of low air exchange rate. For other floorings, the sorption has a minor contribution less than or equal to 5%, regardless of the air exchange rate.
室内表面可能是具有改变室内空气质量潜力的吸附汇。为了估计这种影响，通过使用密封排放室中的固相微萃取的实验方法，评估了五种地板对甲醛和甲苯的吸附参数。吸附速率常数范围从 0.003 到 0.075 m·h -1 ，解吸速率常数从 0.019 到 0.51 h -1 ，分配系数从 0.005 到 3.9 m，这些参数在不同的挥发性有机化合物/材料对之间差异很大，表明吸附行为存在明显差异。一种橡胶被鉴定为甲醛的汇，其解吸常数非常低，接近 0。对于鉴定出的这些吸附性地板，甲醛的吸附速率比甲苯高 2 到 4 倍。使用了两种模型来评估不同实际条件下一个房间内地板对室内污染物浓度的汇效应。测试的情景得出的结论是，在低空气交换率的情况下，一个橡胶（鉴定为汇）对甲醛的吸附最大贡献从 15%到 21%。对于其他地板，无论空气交换率如何，吸附的贡献都较小，小于或等于 5%。
