Project 3: Enhanced Remediation at Arsenic-Contaminated Sites in the US

项目3：美国砷污染场地的强化修复

• 批准号: 9257610
• 负责人: Benjamin C Bostick
• 金额: $ 11.04万
• 依托单位: COLUMBIA UNIVERSITY HEALTH SCIENCES
• 依托单位国家: 美国
• 资助国家: 美国
• 起止时间: 至
• 项目状态: 未结题
• 来源: https://reporter.nih.gov/project-details/9257610
• 关键词: Address; Affect; Agreement; Arsenic; Bacteria; Bangladesh; Biological; Biological Process; Biomass; Carbon; Chemicals; Cods; Complex; Consumption; Data; Diffuse; Environment; Experimental Models; Exposure to; Fatty Acids; Glean; Goals; Health; Immobilization; In Situ; Injection of therapeutic agent; Investigation; Iron; Laboratories; Learning; Link; Measurement; Measures; Methods; Minerals; Modeling; Nitrates; Oxidation-Reduction; Oxides; Pathway interactions; Petroleum; Phospholipids; Population; Precipitation; Process; Production; Property; RNA; Research; Series; Services; Signal Recognition Particle; Site; Soil; Source; System; Technology; Testing; Universities; Work; base; density; design; drinking water; experimental study; improved; magnetite ferrosoferric oxide; model design; organic acid; oxidation; prevent; remediation; superfund site; uptake; water quality

Project 3 - SUMMARY: Groundwater arsenic contamination is both pervasive and difficult to remediate. Our previous research indicates that in situ magnetite formation forms a diffuse barrier capable of long-term As retention. The overarching goals of this project are to develop an enhanced remediation technology that produces magnetite in situ to form a reactive barrier that sustains low arsenic concentrations both in the laboratory and in field trials. Our aims include a series of laboratory-based and field-based experiments to (1) optimize and (2) implement magnetite-based remediation approaches in the field. The laboratory-based aims are designed to develop an improved understanding of the fundamental processes to maximize the potential of magnetite- based approaches to remediation. This information can be used to develop models that account for mineralogical and solution composition changes that effectively predict As fate and transport. We will then use these models to design pilot remediation efforts at the USGS research site on Cape Cod and the Lot 86 Superfund site on the NC State University. Field-based investigations at these two heterogeneous contaminated sites will characterize both background conditions and magnetite formation mechanisms to upscale laboratory data, refine reactive transport models, and develop a “remediation toolbox” to facilitate robust designs of site-specific remediation strategies.

项目 3 - 摘要： 地下水砷污染普遍存在且难以修复。我们之前的研究 表明原位磁铁矿形成形成能够长期保留砷的扩散屏障。这 该项目的总体目标是开发一种生产磁铁矿的增强修复技术 原位形成反应屏障，在实验室和现场维持低砷浓度 试验。我们的目标包括一系列基于实验室和现场的实验，以 (1) 优化和 (2) 在现场实施基于磁铁矿的修复方法。基于实验室的目标旨在 加深对基本过程的了解，以最大限度地发挥磁铁矿的潜力 基于的修复方法。该信息可用于开发模型来解释 矿物学和溶液成分的变化可有效预测砷的命运和运输。然后我们将使用 这些模型用于设计美国地质调查局科德角和 86 号地块研究基地的试点修复工作 北卡罗来纳州立大学的超级基金网站。对这两个异构体进行实地调查 污染场地将描述背景条件和磁铁矿形成机制，以 升级实验室数据，完善反应性运输模型，并开发“修复工具箱”以促进 针对特定地点的修复策略的稳健设计。