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Identification of Remediation Technologies and Conditions that Minimize Formation of Hazardous PAH Breakdown Products at Superfund Sites

确定最大限度地减少超级基金场地有害 PAH 分解产物形成的修复技术和条件

基本信息

批准号：
10339464
负责人：
Staci L Simonich
金额：
$ 28.01万
依托单位：
OREGON STATE UNIVERSITY
依托单位国家：
美国
项目类别：
财政年份：
2009
资助国家：
美国
起止时间：
2009-09-17 至 2025-01-31
项目状态：
未结题

项目摘要

PROJECT SUMMARY – SIMONICH/SEMPRINI PROJECT Although remediation and detection research projects funded by the NIEHS Superfund Research Program have saved >$100 million, recent studies by our laboratory and others have shown that the toxicity of PAH- contaminated soils and sediments increases after biotic and abiotic remediation and that PAH primary transformation products can account for only 23-28% of the increased toxicity. Polar secondary PAH transformation products (e.g., epoxides, carbonyls, and ring-cleavage products) likely account for the majority of toxicity increase after remediation. The overarching goal of this project is to learn to identify remediation technologies that minimize formation of hazardous PAH breakdown products. Our first specific aim is to predict, via computational modeling, the secondary transformation products of PAHs that will form during biotic (microbial) and abiotic (with heat or in situ chemical oxidation) remediation. Our second specific aim is to measure the secondary PAH transformation products that form during laboratory-scale biotic and abiotic remediation experiments. We will feed back our data into Aim 1 to refine our computational model. Our third specific aim is to measure the secondary transformation products of PAHs in real-world Superfund soils and sediments before and after remediation, as well as after natural attenuation. Our fourth specific aim is a) to identify remediation technologies, or combinations of remediation technologies, that minimize the formation of toxic primary and secondary transformation products of PAHs and b) to understand how the optimal remediation strategy depends on the remediation conditions and on the properties of the soils and sediments. We also plan to test any new remediation technologies our stakeholders, or other SRP Centers, wish to evaluate. We will apply passive sampling devices to assess the bioavailability of PAHs and their transformation products. We also apply soil column leaching techniques to assess their tendency to leach from to soil to groundwater. These four Specific Aims, taken together, will help us answer our stakeholders' questions regarding which PAH-transformation products at Superfund sites are hazardous, which transformation products have the potential to result in human exposure, and which exposures have the potential to compromise human health. Based on our findings, we will advise the managers of specific Superfund sites regarding which remediation strategies (or combinations of strategies) minimize the threat to society.

项目摘要--Simonich/Semprini项目尽管由NIEHS超级基金研究计划资助的补救和检测研究项目节省了1亿美元，我们实验室和其他人最近的研究表明，多环芳烃的毒性- 生物和非生物修复后受污染的土壤和沉积物增加，多环芳烃主要转化产物只能占增加毒性的23%-28%。极地次生多环芳烃转化产物(如环氧化物、羰基和环裂解产物)可能占大多数修复后毒性增加的可能性。本项目的首要目标是学习确定补救措施最大限度地减少有害多环芳烃分解产物形成的技术。我们的第一个具体目标是通过计算模型预测将在以下过程中形成的PAHs的二次转化产物生物(微生物)和非生物(加热或原位化学氧化)修复。我们的第二个具体目标是测定实验室规模的生物和非生物过程中形成的二次多环芳烃转化产物补救实验。我们将把数据反馈到目标1，以改进我们的计算模型。我们的第三个具体目标是测量真实世界超级基金土壤中多环芳烃的二次转化产物和修复前后的沉积物以及自然衰减后的沉积物。我们的第四个具体目标是a) 确定补救技术或补救技术的组合，以最大限度地减少形成有毒的一次和二次转化产物的多环芳烃和b)了解如何最佳修复策略取决于修复条件以及土壤和沉积物的性质。我们还计划测试我们的利益相关者或其他SRP中心希望使用的任何新补救技术评估。我们将使用被动采样设备来评估多环芳烃的生物可利用性及其转化产品。我们还应用土柱淋洗技术来评估它们从土壤到土壤的淋洗趋势。地下水。这四个具体目标加在一起，将帮助我们回答利益相关者的问题关于Superfund网站上的哪些PAH转化产品是危险的，哪些转化产品有可能导致人体接触，哪些接触有可能危害人类健康。根据我们的发现，我们将向特定超级基金网站的经理提供建议关于哪些补救战略(或战略组合)将对社会的威胁降至最低。