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首页> 外文会议>2003 Petroleum hydrocarbons and organic chemicals in ground water: prevention, assessment, and remediation >Misconceptions Concerning the Behavior, Fate and Transportof the Fuel Oxygenates TBA and MTBE
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Misconceptions Concerning the Behavior, Fate and Transportof the Fuel Oxygenates TBA and MTBE

机译：关于燃料含氧物TBA和MTBE的行为，命运和运输的误解

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The release of gasoline from underground storage tanks and the subsequent appearance of dissolvedrnconstituents in drinking water has focused attention on the use of MTBE in reformulated fuels. Naturalrnbiodegradation of MTBE in soil, photo-oxidation in the atmosphere or chemical oxidation during remediationrnof gasoline releases can produce the intermediate tertiary butyl alcohol (TBA). TBA is also a fuel oxygenaternand can be found as a co-product in MTBE synthesized from methanol and TBA. Because the physicalrnproperties of ethers and alcohols differ somewhat from the predominant hydrocarbon compounds in gasoline,rnmisconceptions have developed about the behavior of fuel oxygenates in storage and in the subsurface. Criticalrnreview of several misconceptions about MTBE and TBA in gasoline reveals the concepts were conceived tornrationalize early field observations and/or incomplete data sets. Closer scrutiny, in light of recent laboratoryrninvestigations, field data, case studies and world literature, clarifies these misconceptions and assumptionsrnabout the behavior of ether oxygenates and their degradation products in the environment. Commonly heldrnmisconceptions focus on four general areas of fuel and fuel oxygenate management: storage/dispensing,rnhydrology, remediation, and health effects. Storage/dispensing misconceptions address materials stability tornethers and alcohols in fuel and the environmental forensics of fuel systems failure. Groundwater and hydrologyrnmisconceptions deal with plume dynamics and the impact of fuel on drinking water resources. Remediationrnmisconceptions focus on the performance of traditional hydrocarbon remediation technologies, recentrndevelopments in biodegradation and natural attenuation, drivers of remedial design and remediation costs.rnHealth effects misconceptions address both acute and chronic exposure risk evaluations by national andrninternational health agencies. Generally MTBE and TBA are manageable by the same processes andrnprecautions used for gasoline and other fuel hydrocarbons. Indeed specific physical properties of ethers andrnalcohols expedite their treatment by traditional remediation methods of pump and treat, soil vapor extractionrnand bioventing.
机译：从地下储罐中释放出的汽油以及随后在饮用水中溶解成分的出现，都将注意力集中在将MTBE用于配方燃料中。土壤中MTBE的自然生物降解，大气中的光氧化或补救过程中的化学氧化–释放汽油可产生中间体叔丁醇（TBA）。 TBA也是一种燃料氧气，可以作为由甲醇和TBA合成的MTBE的副产物。由于醚和醇的物理性质与汽油中的主要烃类化合物有些不同，因此人们对在存储和地下的燃料含氧化合物的行为产生了误解。对汽油中MTBE和TBA的几种误解进行了严格的审查，发现这些概念是为了合理化早期现场观察结果和/或不完整的数据集而设计的。根据最近的实验室研究，现场数据，案例研究和世界文献，进行更严格的审查，以澄清这些关于醚含氧化合物及其降解产物在环境中的行为的误解和假设。常见的误解集中在燃料和燃料含氧化合物管理的四个一般领域上：存储/分配，水文学，修复和对健康的影响。储存/分配误解解决了燃料中的物质稳定性，醚类和醇类以及燃料系统故障的环境鉴定。地下水和水文学的误解涉及羽流动力学以及燃料对饮用水资源的影响。补救措施误解的重点是传统碳氢化合物修复技术的性能，生物降解和自然衰减的最新发展，补救措施的设计和修复成本。rn健康影响误解涉及国家和国际卫生机构对急性和慢性暴露风险评估的问题。通常，MTBE和TBA可以通过与汽油和其他燃料碳氢化合物相同的工艺和预防措施来管理。确实，醚类和醇类的特定物理性质可以通过传统的泵送处理，土壤蒸气提取和生物排放的修复方法来加快其处理速度。

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