Dynamic behavior of semivolatile organic compounds in indoor air. 2. Nicotine and phenanthrene with carpet and wallboard
Dynamic behavior of semivolatile organic compounds in indoor air. 2. Nicotine and phenanthrene with carpet and wallboard
复制标题
DOI：
10.1021/es001372a
复制
发表时间：
2001-02-01
影响因子：
11.4
通讯作者：
Nazaroff, WW
中科院分区：
文献类型：
--
作者：
Van Loy, MD;Riley, WJ;Nazaroff, WW
在一个房间大小的环境试验室中，研究了尼古丁和菲在地毯、油漆墙板和不锈钢上的表面相互作用。通过将每个化合物的已知质量闪蒸到装有一个或多个被测试的吸附剂的密封的20m(3)室中来测试吸附动力学。在每个实验中，在气相浓度达到明显的平台期后进行一次或多次排放。在每次实验结束时，对小室进行通风和重新密封，以监测化合物从吸着剂中的重新排放。通过将质量平衡模型与实验结果进行拟合，确定了吸附动力学参数。不锈钢对尼古丁和菲的吸附能力相当。尼古丁在地毯和墙板上的吸附更强，平衡分配值高出2-3个数量级。菲在地毯和墙板上的吸附容量较小，约为不锈钢的10-20%。对于所有的吸附剂-吸附剂对，吸收速率是相似的，并且与气相边界/层质量传输施加的限制是一致的。菲的解吸速度比尼古丁快得多。模型模拟预测了典型吸烟居所的平均尼古丁水平，与公布的数据一致。
The surface interactions of nicotine and phenanthrene with carpet, painted wallboard, and stainless steel were investigated in a room-sized environmental test chamber. Adsorption kinetics were tested by flash evaporating a known mass of each compound into a sealed 20 m(3) chamber containing one or more of the tested sorbents. In each experiment, one or more emissions were performed after the gas-phase concentration had reached an apparent plateau. At the end of each experiment, the chamber was ventilated and resealed to monitor reemission of the compound from the sorbents. Kinetic sorption parameters were determined by fitting a mass-balance model to the experimental results. The sorption capacity of stainless steel was of similar magnitude for nicotine and phenanthrene. Sorption of nicotine on carpet and wallboard was much stronger, with equilibrium partitioning values 2-3 orders of magnitude higher. The sorption capacities of phenanthrene on carpet and wallboard were smaller, approximately 10-20% of the stainless steel values. The rates of uptake are of similar magnitude for all sorbate-sorbent pairs and are consistent with the limit imposed by gas-phase boundary/layer mass transport. The rates of desorption are much faster for phenanthrene than for nicotine. Model simulations predict average nicotine levels in a typical smoking residence that are consistent with published data.