Pilot-scale Research of Novel Amendment Delivery for in-situ Sediment Remediation

沉积物原位修复新型修复剂输送中试研究

• 批准号: 7919678
• 负责人: Upal Ghosh
• 金额: $ 20.5万
• 依托单位: UNIVERSITY OF MARYLAND BALTIMORE COUNTY
• 依托单位国家: 美国
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-09-06 至 2011-08-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/7919678
• 关键词: Address; Adoption; Amendment; Apatites; Area; Assimilations; Bauxite; Benefits and Risks; Binding; Biological; Biological Availability; Biological Monitoring; Biological Process; Biota; Carbon; Chemicals; Collaborations; Consultations; Dermal; Dose; Eating; Ecosystem; Effectiveness; Engineering; Environment; Exposure to; Fishes; Food Chain; Fresh Water; Habitats; Health; Health Benefit; Human; In Situ; Injection of therapeutic agent; Investigation; Laboratories; Life; Measurement; Measures; Mechanics; Methods; Minerals; Modeling; Monitor; Names; Pathway interactions; Philadelphia; Polychlorinated Biphenyls; Process; Public Health; Recreation; Research; Research Design; Research Personnel; Research Project Grants; Risk; Rivers; Shellfish; Site; System; Technology; Testing; Time; Transport Process; United States Environmental Protection Agency; Water; Work; Zeolites; aqueous; base; chemical release; contaminant transport; cost; design; exposed human population; food chain contamination; meetings; novel; novel strategies; pollutant; pressure; programs; remediation; scale up; toxic metal; uptake

Human health risks associated with the presence of chemicals in sediments arise from either direct contact with the sediments or by eating fish and shellfish that have accumulated chemicals from the sediments. merging laboratory-scale research by our group and others has shown that contaminant transport pathways and bioavailability can be interrupted by modifying and enhancing the binding and contaminant assimilation capacity of natural sediments. This is achieved by adding sorbent amendments such as activated carbon for binding persistent organic pollutants and natural minerals such as apatite, zeolites, or bauxite for the binding of toxic metals in sediments. Critical barriers in the adoption of this in-situ remediation approach is the availability of efficient delivery methods for amendments to impacted sediments and understanding of physical and biological processes in field sites that control technology effectiveness. The main aim of this research project is to develop the in-situ remediation technology through a pilot-scale investigation aimed at addressing the critical barriers in the advancement of the technology. This field research project will be carried out at two PCB/DDT-impacted sensitive wetland sites. The research design will involve application of the technology in a quarter acre plot in each site and a monitoring plan to understand how the fate and transport processes of PCB/DDT in the wetland environment is impacted by the application of the sorbent amendments. Biological monitoring will include PCB/DDT bio-uptake measurements in a freshwater oligochaete carried out in field exposure chambers and also in laboratory microcosms. The physicochemical monitoring will include aqueous partitioning and desorption rate from sediment, two measures that define the bioavailability processes of sediment bound contaminants. The PCB/DDT fate and transport process understanding will be used to assess human health risk benefit from the technology based on a dermal uptake model and a food-chain model. Sediment-bound contaminants such as PCBs and DDT pose a public health risk through contamination of the food chain and through direct exposure. This field research will evaluate the effectiveness of a novel approach to alter the binding capacity of sediments to reduce human exposure to such contaminants.

与沉积物中化学物质的存在相关的人类健康风险来自于直接接触 与沉积物接触，或食用从沉积物中积累化学物质的鱼类和贝类。 我们小组和其他人的实验室规模研究相结合表明，污染物迁移 可以通过修改和增强结合和污染物来中断途径和生物利用度 自然沉积物的同化能力。这是通过添加吸附剂改良剂来实现的，例如 用于结合持久性有机污染物和天然矿物质（例如磷灰石、沸石或 铝土矿用于结合沉积物中的有毒金属。采用这种就地方法的关键障碍 修复方法是提供有效的交付方法来修正受影响的沉积物 以及对控制技术有效性的现场物理和生物过程的了解。 该研究项目的主要目的是通过中试规模开发原位修复技术 旨在解决技术进步中的关键障碍的调查。这个领域 研究项目将在两个受 PCB/DDT 影响的敏感湿地地点进行。研究设计 将涉及在每个地点四分之一英亩的土地上应用该技术以及监测计划 了解 PCB/DDT 在湿地环境中的归宿和迁移过程如何受到以下因素的影响 吸附剂修正的应用。生物监测将包括 PCB/DDT 生物吸收 在野外暴露室和实验室中对淡水寡毛类动物进行测量 微观世界。物理化学监测将包括水分配和解吸速率 沉积物，定义沉积物结合污染物的生物利用度过程的两种措施。这 PCB/DDT 归宿和运输过程的了解将用于评估人类健康风险效益 该技术基于皮肤吸收模型和食物链模型。 PCB 和 DDT 等沉积物污染物通过污染 食物链和直接接触。这项实地研究将评估一种新颖的方法的有效性 改变沉积物的结合能力以减少人类接触此类污染物的方法。