Goethe-University, Institute of Atmospheric and Environmental Sciences, Department of Analytical Environmental Chemistry, Altenhöferallee1, 60438 Frankfurt, Germany.
Chemosphere. 2011 Mar;82(10):1482-8. doi: 10.1016/j.chemosphere.2010.11.033. Epub 2010 Dec 16.
Laboratory experiments were performed to investigate the partitioning behavior of a set of diverse volatile organic compounds (VOCs). After equilibration at a temperature of 25°C, the VOC concentrations were measured by headspace method in combination with gas chromatography/mass spectrometry (GC/MS). The obtained data were used to determine the partition coefficients (K(P)) of VOCs in a gas-liguid-solid system. The results have shown that the presence and nature of solid materials in the working solution control the air-water partitioning of dissolved VOCs. The air/solution partitioning of BTEX and C(9)-C(10) aldehydes was most affected in the presence of diesel soot. K(P) values decreased by a factor ranging from 1.5 for toluene to 3.0 for ethylbenzene. The addition of mineral dust in the working solution exhibited greater influence on the partitioning of short aldehydes. K(P) values decreased by a factor of 1.8. The experimental partition coefficients were used to develop a predictive model for partitioning of BTEX and n-aldehydes between air, water and solid phases.
实验室实验旨在研究一组不同挥发性有机化合物（VOCs）的分配行为。在 25°C 的温度下达到平衡后，通过顶空法与气相色谱/质谱联用（GC/MS）测量 VOC 浓度。所得数据用于确定气-液-固体系中 VOC 的分配系数（K(P)）。结果表明，工作溶液中固体材料的存在和性质控制着溶解 VOC 的气-水分配。在柴油烟尘存在的情况下，BTEX 和 C(9)-C(10)醛的空气/溶液分配受到的影响最大。甲苯的 K(P) 值降低了 1.5 倍，乙苯的 K(P) 值降低了 3.0 倍。工作溶液中矿物质粉尘的添加对短醛的分配影响更大，K(P) 值降低了 1.8 倍。实验分配系数用于开发预测模型，用于预测 BTEX 和正醛在空气、水和固相之间的分配。
