Low-Cost Electronic Nose for Groundwater Contaminants

用于地下水污染物检测的低成本电子鼻

• 批准号: 7537117
• 负责人: Sanjay V Patel
• 金额: $ 9.77万
• 依托单位: SEACOAST SCIENCE, INC.
• 依托单位国家: 美国
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-09-01 至 2009-08-28
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/7537117
• 关键词: Address; Algorithms; Characteristics; Chemicals; Chlorinated Hydrocarbons; Classification; Collection; Compatible; Condition; Data; Data Collection; Detection; Electronics; Engineering; Environment; Environmental Health; Environmental Monitoring; Feedback; Fingerprint; Fluorescence; Goals; Humidity; Industrial Health; Laboratories; Lasers; Left; Liquid substance; Location; Machine Learning; Maps; Marketing; Measures; Methods; Modification; Monitor; Nose; Numbers; Pattern Recognition; Phase; Poison; Polymers; Process; Public Health; Pump; ROC Curve; Range; Rate; Recommendation; Research; Risk; Safety; Sampling; Science; Simulate; Site; Soil; Solutions; Source; Standards of Weights and Measures; Stream; Surface; System; Techniques; Technology; Temperature; Testing; Time; Trichloroethylene; Water; Work; aqueous; base; cold temperature; computerized data processing; cost; cost effectiveness; design; detector; drinking water; ground water; innovation; membrane assembly; pollutant; prototype; remediation; response; sensor; superfund site; vapor; wasting; water treatment

DESCRIPTION (provided by applicant): Several US agencies and regulators require low-cost chemical sensors for detecting and monitoring environmental clean-up, remediation, and decommissioning processes where groundwater may be contaminated. The sensors must be capable of detecting contaminants in the sub-surface groundwater and must be compatible with use in a range of environments. Most significantly, these customers require a low-cost alternative to its current expensive and labor intensive methods, namely using mobile laboratories. The project will result in the innovative use of low-cost sensor systems that will be capable of detecting and monitoring for dense non-aqueous phase liquids in the subsurface and groundwater, unattended, and in real- time from within a push-probe, using a chemicapacitor array and miniature preconcentrator. Seacoast's Phase I research will focus on developing the sensor array, demonstrating sensitivity to chlorinated hydrocarbons at relevant concentrations, and field tests in actual contaminated sites. The ultimate goal is to provide the DOD, DOE, NIEHS and other agencies with a method to map and track subsurface contamination plumes in real-time without requiring an operator. The systems will have MEMS microcapacitor sensor arrays that can monitor for leaks of toxic chemicals, contaminants from wastes, and changes in groundwater streams. A preconcentrator collects the contaminants and releases them to a microsensor array. The sensor arrays are filled with several chemoselective polymers whose dielectric permittivity changes when exposed to different vapors, creating a fingerprint response for each chemical. An array of differently responding sensors and pattern recognition can thereby compensate for changes in humidity, temperature, and composition. These low-power systems can be left unattended and transmit data wirelessly or through USB to a central location. The most important application to public health and safety is unattended monitoring of drinking water, water treatment processes, and water sources. The potential commercial markets include building chemical process monitoring and control, toxic vapor leak detection, industrial process control, and industrial health and safety. Transitioning the developed prototype to other markets where worker and public health, environmental health and regulatory compliance will be investigated to reduce the financial risks and broaden the acceptance of the technology. PUBLIC HEALTH RELEVANCE: This proposal will describe a potential method to specifically address the need for detecting groundwater contaminants and long-term monitoring of contaminated sites, by providing an unattended sensor system that tracks contamination in real-time and transmits contaminant concentrations. Such a system would be used in tandem with other methods, to provide comprehensive contamination management at DOE, DOD, and Superfund sites where ground and water clean-up projects are already underway. The proposed work will focus on detection of chlorinated hydrocarbons, which are described as among the most common pollutants in groundwater and soils at DOE sites.

描述（由申请人提供）：几个美国机构和监管机构需要低成本的化学传感器来检测和监视环境清理，补救和退役过程，这些过程可能会污染地下水。传感器必须能够检测地下地下水中的污染物，并且必须与在各种环境中使用兼容。最重要的是，这些客户需要使用移动实验室的当前昂贵和劳动密集型方法的低成本替代品。该项目将导致低成本传感器系统的创新使用，这些系统将能够使用ChemiciCapacitor阵列和微型调节器，从而在地下和地下水中检测和监视地下和地下水中的致密非水相液体。 Seacoast的第一阶段研究将着重于开发传感器阵列，在相关浓度下表现出对氯化碳氢化合物的敏感性，并在实际受污染的位点进行现场测试。最终目标是为DOD，DOE，NIEH和其他机构提供一种方法，以实时绘制和跟踪地下污染李子，而无需操作员。该系统将具有MEMS微电容器传感器阵列，该阵列可以监测有毒化学物质的泄漏，废物中的污染物以及地下水流的变化。预浓缩器收集污染物并将其释放到微传感器阵列中。传感器阵列充满了几种化学选择性聚合物，其介电介电常数在暴露于不同蒸气时会发生变化，从而为每种化学物质产生指纹响应。一系列不同的响应传感器和模式识别可以弥补湿度，温度和成分的变化。这些低功率系统可以无人机或通过USB传输数据到中心位置。公共卫生和安全的最重要应用是对饮用水，水处理过程和水源的无人关注的监测。潜在的商业市场包括建筑物过程监测和控制，有毒蒸气泄漏检测，工业过程控制以及工业健康与安全。将开发的原型过渡到其他市场，在这些市场中，将研究工人和公共卫生，环境健康和监管合规性，以降低财务风险并扩大对技术的接受。公共卫生相关性：该建议将描述一种潜在的方法，可以通过提供无人值守的传感器系统，以实时跟踪污染和传播污染物浓度，以专门解决检测地下水污染物和对受污染部位的长期监测的需求。这样的系统将与其他方法一致使用，以在DOE，DOD和SuperFund网站上提供全面的污染管理，并已经在进行地面和水清洁项目。拟议的工作将集中于检测氯化碳氢化合物，这些烃被描述为在DOE部位的地下水和土壤中最常见的污染物之一。