| Title: | A predictive method for volatile organic compounds emission from soil: Evaporation and diffusion behavior investigation of a representative component of crude oil |
| Author(s): | Wang H; Fischer T; Wieprecht W; Moller D; |
| Address: | "Brandenburg University of Technology Cottbus-Senftenberg, Central Analytical Laboratory, Konrad-Wachsmann-Allee 6, 03046 Cottbus, Germany. Brandenburg University of Technology Cottbus-Senftenberg, Central Analytical Laboratory, Konrad-Wachsmann-Allee 6, 03046 Cottbus, Germany. Electronic address: thomas.fischer@tu-cottbus.de. Brandenburg University of Technology Cottbus-Senftenberg, Volmerstr. 13, 12489 Berlin, Germany" |
| DOI: | 10.1016/j.scitotenv.2015.05.063 |
| ISSN/ISBN: | 1879-1026 (Electronic) 0048-9697 (Linking) |
| Abstract: | "Pipelines are convenient, economical and widely used mode of transportation of crude oil. However, the inevitable or otherwise accidents during such transport of crude oil lead to large scale oil spills, which consequently result in both soil and air pollution. When such pollution occurs, crude oil VOC concentrations in air, soil pollution evaluation and VOC propagation in soil provide important evidence for airborne detection of oils spills. Therefore, several issues, including determination method for VOC, isotherm parameters of VOC sorption on soil surfaces, and VOC diffusion flux simulation, are significant. In our previous study, n-butane and n-pentane were proved to be the maximum VOCs in studied crude oils. Therefore, a predictive method using n-pentane as a representative component is proposed in this paper. Firstly, a headspace solid phase microextraction (SPME) method was developed for determination of n-pentane in non-equilibrium mass transfer conditions. Secondly, Brunauer-Emmett-Teller (BET) analysis with liquid nitrogen was carried out to predict isotherm parameters for n-pentane. Finally, two models were used to predict the emission process. Probably influenced by gas vapor density below and above the soil layer, the experimental data amounted to 74% of the deduced value from the simplified analytical model. However, the free diffusion model fitted well with the experimental results" |
| Keywords: | "Air Pollution/*statistics & numerical data Butanes/analysis Diffusion *Models, Chemical Pentanes/analysis *Petroleum Soil/*chemistry Volatile Organic Compounds/*analysis Pentane Pollution Sand Voc;" |
| Notes: | "MedlineWang, Haijing Fischer, Thomas Wieprecht, Wolfgang Moller, Detlev eng Research Support, Non-U.S. Gov't Netherlands 2015/06/01 Sci Total Environ. 2015 Oct 15; 530-531:38-44. doi: 10.1016/j.scitotenv.2015.05.063. Epub 2015 May 28" |
