The Use of Stable Isotopes to Investigate Hydrocarbon- Contaminated Soils and Groundwaters

小行星9631735 该提案是应NSF 92-6环境地球化学和生物地球化学征集而提交的。 它由地球科学部、分子和细胞科学部以及EPSCoR办公室共同资助。 拟议的研究将涉及使用稳定同位素作为一种潜在的技术，以调查影响地下有害有机化合物行为的来源和过程。 拟议的跨学科研究将结合联合收割机的地球化学和微生物成分的碳同位素系统学的实验研究甲苯，五个更频繁地检测到的地下水污染物在危险场所之一。 该研究将强调分馏伴随过程，如吸附、挥发、游离液相的溶解和微生物降解。 将使用气相色谱-燃烧-同位素比质谱法监测稳定同位素组成。 这项研究可能最终有助于识别和量化涉及这些有机化合物的自然过程的方法，也有助于工程修复工作。

9631735 Poulson This proposal was submitted in response to the Environmental Geochemistry and Biogeochemistry solicitation, NSF 92-6. It is being jointly funded by the Earth Sciences Division, the Molecular and Cellular Sciences Division, and the EPSCoR office. The proposed research will involve the use of stable isotopes as a potential technique to investigate the sources and processes affecting behavior of hazardous organic compounds in the subsurface. The proposed interdisciplinary research will combine geochemical and microbiological components in an experimental investigation of the carbon isotope systematics of toluene, one of the five more frequently detected groundwater contaminants at hazardous sites. the research will emphasize fractionation accompanying processes such as adsorption, volatilization, dissolution of a free liquid phase, and microbial degradation. Stable isotope compositions will be monitored using gas chromatography - combustion - isotope ratio mass spectrometry. The research may ultimately contribute to approaches used to identify and quantify natural processes involving these organic compounds and also to engineer remediation efforts.