Engineering Research Equipment: Membrane Introduction Mass Spectrometer

9622294本提案所要求的带有膜引入系统的离子陷阱质谱仪将专门用于支持环境工程的研究。该仪器将用于几个项目，包括：1)杂交杨树在危险废物预防和修复中吸收BETX化合物和代谢物；2)弹药废物的陆地植物修复；3)金属铁还原脱氯卤代甲烷；4)环境可接受的芳香物质刺激BTX生物修复；以及5)厌氧和多电子受体生物修复氯化地下污染的应用。与膜引入采样系统相结合，质谱仪将允许连续和同时监测水基质中与环境有关的挥发性成分。通过注射器注射，该仪器将被用作三硝基甲苯和杀虫剂等非挥发性化合物的结构识别技术。从这些实验室实验中获得的信息将用于现场污染预防和补救情况。如果成功，在拟议设备的帮助下制定的战略有可能通过提供更具成本效益的现场补救技术来节省数百万美元。

9622294 Schnoor The ion-trap mass spectrometer with a membrane introduction system requested in this proposal will be dedicated to support research in environmental engineering. The instrument will be used for several projects, including: 1) Uptake of BETX Compounds and Metabolites by Hybrid Poplar Trees in Hazardous Waste Prevention and Remediation; 2) Terrestrial Phytoremediation of Ammunition Wastes; 3) Reductive Dechlorination of Halogenated Methanes with Iron Metal; 4) Stimulation of BTX Bioremediation by Environmentally Acceptable Aromatic Substances; and 5) Application of Anaerobic and Multiple-Electron-Acceptor Bioremediaton of Chlorinated Subsurface Contamination. Coupled with a membrane introduction sampling system, the mass spectrometer will allow for the continuous and simultaneous monitoring of volatile components of environmental concern in a water matrix. Using syringe injections, the instrument will be used as a structure identification technique for nonvolatile compounds such ass trinitrotoluene and pesticides. The information gained from these laboratory experiments will be applied to field pollution prevention and remediation situations. If successful, the strategies developed with the help of the proposed equipment have the potential to save millions of dollars by offering more cost effective, in-situ site remediation techniques.