Laser-based spectrometer for real-time monitoring of VOCs at Superfund sites

用于实时监测超级基金现场 VOC 的激光光谱仪

基本信息

批准号：
8253212
负责人：
John Brian Leen
金额：
$ 14.99万
依托单位：
LOS GATOS RESEARCH
依托单位国家：
美国
项目类别：
财政年份：
2012
资助国家：
美国
起止时间：
2012-09-21 至 2013-02-28
项目状态：
已结题

来源：
https://reporter.nih.gov/project-details/8253212
关键词：
1,3-Butadiene Accounting Acrolein Air Algorithms Area Benzene Businesses Calibration California Carbon Dioxide Collaborations Collection Data Data Quality Detection Drug Kinetics Environmental Monitoring Formaldehyde Funding Gas Chromatography Gases Goals Health Health Hazards Home environment Hour Human Individual Industrial Waste Internet Lasers Life Link Marketing Masks Mass Spectrum Analysis Measurement Measures Methods Modeling Monitor Naphthalene Optics Ozone Performance Phase Poison Population Process Reporting Research Research Project Grants Risk Safety Sampling Scanning Site Solutions Spectroscopy, Fourier Transform Infrared Spectrum Analysis System Technology Testing Tetrachloroethylene Time Trichloroethylene Validation Variant Vinyl Chloride Work Workplace absorption base cost design detector ethylbenzene experience ground water improved innovation instrument instrumentation pollutant prototype quantum remediation response sample collection success superfund site tenax vapor volatile organic compound

项目摘要

DESCRIPTION (provided by applicant): Toxic volatile organic compounds (VOCs) emitted from contaminated groundwater plumes represent a significant health risk at industrial sites throughout the nation and a specific need exists for VOC monitoring at Superfund sites. Accurate, real-time monitoring of toxic VOCs on site is critical to evaluating the success of remediation efforts, assessing human health risks, and developing robust exposure models that properly account for confounding factors such as temporal exposure variation and population-specific pharmacokinetics. Unfortunately, simple, rapid, and accurate VOC monitoring is an ongoing challenge, and available technology is costly, labor intensive, slow, and unable to characterize reactive gases (e.g. acrolein, ozone, etc.). In this Small Business Innovative Research (SBIR) project, Los Gatos Research (LGR) will develop an autonomous instrument for the real-time monitoring of sub-parts per billion (ppb) levels of VOCs in ambient air without requiring extensive consumables. LGR's VOC detector will significantly improve data quality at Superfund sites by allowing for more rapid and frequent measurements without labor-intensive collection and transport of sample traps, while remaining cost competitive with alternative technologies. The VOC analyzer will use LGR's mid infrared (MIR) incoherent cavity ringdown spectroscopy (iCRDS) technology, which utilizes a broadly tunable external cavity quantum cascade lasers (8.3 - 12.5 5m) and chemometric fitting algorithm to directly measure and analyze optical absorption due to multiple VOCs in ambient air. During Phase I of this project, LGR will refine an existing MIR iCRDS analyzer to include a larger wavelength range and improved optics. We will verify the instrument's ability to accurately identify and quantify VOCs in a variety of ambient air compositions, including an analysis of VOC-to-VOC measurement crosstalk. Additionally, LGR will deploy the prototype at a Superfund site in Mountain View, California to record, analyze, and report VOC concentrations in ambient air. At the conclusion of the project, LGR will have demonstrated the use of MIR iCRDS for the detection of VOCs at Superfund sites as a superior method of characterizing the risks to human health from toxic vapor intrusion. PUBLIC HEALTH RELEVANCE: The contamination of groundwater by industrial pollutants poses a significant risk to the health of individuals living and working above tainted sites. Measuring the concentration of pollutants that reach indoor air (worksites, offices and homes) is a critical first step to understanding and ultimately minimizing the human health hazards of contaminated ground water (especially at Superfund sites). Los Gatos Research's proposed instrument for measuring volatile organic pollutants will greatly improve on existing monitoring technology by increasing the data rate to characterize transient exposure, accurately measuring reactive species, and eliminating labor costs associated with sample collection.

描述（由申请人提供）：受污染的地下水李子发出的有毒挥发性有机化合物（VOC）代表了全国各个工业场所的重大健康风险，并且在超级基金站点的VOC监测中存在特定的需求。对现场有毒VOC的准确，实时监测对于评估补救工作的成功，评估人类健康风险以及开发适当说明混杂因素（例如时间暴露差异和人口特异性药代动力学）的稳健暴露模型至关重要。不幸的是，简单，快速和准确的VOC监视是一个持续的挑战，可用的技术是昂贵，劳动力密集，缓慢的，无法表征反应性气体（例如丙烯醛，臭氧等）。在这个小型企业创新研究（SBIR）项目中，Los Gatos Research（LGR）将开发一种自主工具，用于在不需要大量消耗品的情况下对环境空气中10亿（PPB）的实时监控。 LGR的VOC探测器将通过允许更快，频繁地测量超级基金站点的数据质量，而无需劳动密集型收集和运输样品陷阱，同时与替代技术保持了成本竞争。 VOC分析仪将使用LGR的MID红外（MIR）腔循环光谱（ICRDS）技术，该技术利用了广泛可调的外部空腔量子级联激光器（8.3-12.5 5m）和化学拟合算法直接测量和分析光学吸收，这是由于多种发音在稳定的空气中。在该项目的第一阶段，LGR将完善现有的miR ICRDS分析仪，以包括较大的波长范围和改进的光学元件。我们将验证该仪器在各种环境空气组合物中准确识别和量化VOC的能力，包括对VOC到VOC测量串扰的分析。此外，LGR将在加利福尼亚州山景城的超级基金站点部署原型，以记录，分析和报告环境空气中的VOC浓度。在该项目的结论结束时，LGR将证明使用miR ICRD在超级基金站点检测VOC，作为一种表征有毒蒸气侵入的人类健康风险的优越方法。公共卫生相关性：工业污染物对地下水的污染对生活和工作的个人的健康构成了重大风险。测量到达室内空气（工作地点，办公室和房屋）的污染物的浓度是理解并最终最大程度地减少受污染的地下水（尤其是在超级基金地点）的人类健康危害的关键第一步。洛斯加托斯研究（Los Gatos Research）提出的用于测量挥发性有机污染物的工具将通过提高数据速率以表征瞬态暴露，准确测量反应性物种并消除与样本收集相关的劳动力成本，从而大大改善现有监测技术。