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.

与沉积物中存在的化学品有关的人类健康风险来自直接接触 或者通过吃鱼和贝类来吸收沉积物中积累的化学物质。 我们小组和其他人的实验室规模的研究表明，污染物的传输 可以通过改变和增强结合和污染物来中断途径和生物利用度 天然沉积物的同化能力。这是通过添加吸附剂修正剂来实现的， 用于结合持久性有机污染物和天然矿物如磷灰石、沸石或 铝土矿用于沉积物中有毒金属的结合。采用这一现场技术的关键障碍 补救方法是提供有效的方法，对受影响的沉积物进行修正 了解控制技术有效性的现场物理和生物过程。 本研究的主要目的是通过中试规模开发原位修复技术 调查旨在解决技术进步中的关键障碍。这一领域 研究项目将在两个受多氯联苯/滴滴涕影响的敏感湿地进行。研究设计 将涉及在每个地点的四分之一英亩地块上应用该技术，并制定监测计划， 了解湿地环境中多氯联苯/滴滴涕的归宿和迁移过程如何受到 吸附剂改良剂的应用。生物监测将包括多氯联苯/滴滴涕的生物吸收 在野外暴露室和实验室中对淡水寡毛类进行的测量 微观世界物理化学监测将包括水分配和解吸率， 沉积物，两个措施，确定沉积物结合污染物的生物利用度过程。的 将利用对多氯联苯/滴滴涕归宿和迁移过程的了解，评估多氯联苯/滴滴涕对人类健康的风险惠益， 该技术基于皮肤吸收模型和食物链模型。 与沉积物有关的污染物，如多氯联苯和滴滴涕，通过污染 通过食物链和直接接触。这项实地研究将评估一本小说的有效性 因此，必须采取措施，改变沉积物的结合能力，以减少人类接触此类污染物的机会。