Continued Development of Photoelectrocatalytic Oxidation for Treating Gasoline Co

光电催化氧化处理汽油的持续发展

• 批准号: 8125778
• 负责人: TERENCE PATRICK BARRY
• 金额: $ 62.57万
• 依托单位: AQUAMOST, INC.
• 依托单位国家: 美国
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-09-01 至 2013-08-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/8125778
• 关键词: Acute; Air; Aromatic Hydrocarbons; Benzene; Biodegradation; Carbon; Characteristics; Chemicals; Chemistry; Complement; Country; Data; Development; Devices; Effectiveness; Electrodes; Engineering; Environmental Health; Gasoline; Goals; Health; Human; Isomerism; Laboratories; Longevity; Maintenance; Marketing; Performance; Phase; Precipitation; Process; Pump; Resistance; Resources; Risk; Sampling; Series; Site; System; Technology; Testing; Toluene; Toxic effect; Water; Water Pollutants; Water Supply; Work; Xylene; alternative treatment; base; commercialization; cost; design; drinking water; improved; instrument; meetings; methyl tert-butyl ether; oxidation; phase 1 study; pollutant; remediation; water solubility; water treatment

DESCRIPTION (provided by applicant): AquaMost is developing a water treatment device based on a technology called photoelectrocatalytic oxidation (PECO). The focus for this project is using PECO systems to treat groundwater contaminated with organic pollutants released from leaking underground storage tanks. Two chemical classes are of particular concern: (1) aromatic hydrocarbons, particularly the BTEX chemicals benzene, ethyl benzene, toluene, and three isomers of xylene, and (2) fuel oxygenates, particularly methyl tert-butyl ether (MTBE). These chemicals are a significant risk to human health. Both chemical classes have acute and long-term toxic effects, and may be carcinogenic. For these reasons, considerable federal, state, and private resources are being expended to remove these chemicals from contaminated groundwater sites throughout the country. Several unique chemical characteristics of MTBE (e.g., high water solubility, high polarity, resistance to biodegradation) make it very difficult to remove from water using existing remediation technologies. The specific objectives of the Phase II project are to: (1) conduct long-term (> 6 months) field trials with commercial-scale PECO systems at several contaminated sites that differ with respect to contaminant levels, groundwater chemistry, etc. to obtain data on the long-term efficacy and performance of these systems, and (2) enhance the size and/or performance of the systems so that they can treat contaminated groundwater in a single pass at a flow rate of 5 to 10 gal/min (the current embodiment works at ~1 gal/min). Field tests will be performed at two primary sites and several secondary sites in conjunction with two environmental remediation companies that will serve as subcontractors on this project. These tests will help to answer several questions about the effectiveness of these PECO systems, including: (1) how will the technology perform under different field conditions? (2) What is the longevity and durability of the PECO unit electrodes under practical conditions? (3) How well does the technology enhance and complement current groundwater remediation technologies (e.g., activated carbon, air stripping, etc.)? (4) What are the operational and maintenance costs of using PECO to remediate contaminated groundwater? The PECO systems will be continually reengineered throughout these trials until an effective, robust, and economical commercial product is available for the market. PUBLIC HEALTH RELEVANCE: The fuel additive methyl tert-butyl ether (MTBE) and other hazardous and carcinogenic petrochemicals (e.g., BTEX) can enter the nation's drinking water supply from leaking underground storage tanks, fuel spills, precipitation, and runoff. AquaMost has developed a device based on a technology called photoelectrocatalytic oxidation (PECO) and demonstrated in Phase 1 that it can efficiently and economically remove hazardous organic pollutants from water. The Phase 2 project will focus on conducting a series of field trials to evaluate the performance and reliability of a commercial PECO system engineered to remediate contaminated groundwater and alleviate the environmental health risks associated with these chemicals.

描述(申请人提供)：AquaMost正在开发一种基于光电催化氧化(PECO)技术的水处理设备。该项目的重点是使用PECO系统处理被地下储罐泄漏释放的有机污染物污染的地下水。有两类化学物质特别值得关注：(1)芳香烃，特别是苯系物化学品苯、乙苯、甲苯和二甲苯的三种异构体；(2)燃料含氧物，特别是甲基叔丁基醚(MTBE)。这些化学物质对人类健康构成重大威胁。这两类化学物质都有急性和长期的毒性作用，并可能致癌。出于这些原因，联邦、州和私人正在花费大量资源，从全国各地受污染的地下水场地中清除这些化学物质。MTBE的几个独特的化学特性(如高水溶性、高极性、抗生物降解)使得使用现有的修复技术很难从水中去除。第二阶段项目的具体目标是：(1)在污染物水平、地下水化学等方面不同的几个污染地点，用商业规模的PECO系统进行长期(6个月)的实地试验，以获得关于这些系统的长期效果和性能的数据，以及(2)提高系统的规模和/或性能，以便它们能够以5至10加仑/分钟的流速一次性处理受污染的地下水(目前的实施例工作速度约为1加仑/分钟)。将在两个主要地点和几个次要地点与两家环境补救公司一起进行现场测试，这两家公司将作为该项目的分包商。这些测试将有助于回答有关这些PECO系统有效性的几个问题，包括：(1)该技术在不同的现场条件下将如何运行？(2)PECO单元电极在实际条件下的寿命和耐久性如何？(3)该技术在多大程度上增强和补充了当前的地下水修复技术(例如，活性碳、空气剥离等)？(4)使用PECO修复受污染的地下水的操作和维护成本是多少？在这些试验过程中，PECO系统将不断进行重新设计，直到市场上出现有效、坚固和经济的商业产品。 与公共健康相关：燃料添加剂甲基叔丁基醚(MTBE)和其他危险和致癌的石化产品(如苯系物)可从泄漏的地下储水罐、燃料泄漏、降水和径流进入国家的饮用水供应。AquaMost开发了一种基于光电催化氧化(PECO)技术的设备，并在第一阶段展示了它可以高效且经济地从水中去除有害有机污染物。第二阶段项目将重点进行一系列实地试验，以评估商业PECO系统的性能和可靠性，该系统旨在修复受污染的地下水并减轻与这些化学品相关的环境健康风险。