Funnel and Gate Innovations-Stabilization and Treatment of Contaminated Sediments

漏斗和闸门创新 - 受污染沉积物的稳定和处理

• 批准号: 7501342
• 负责人: Danny D. Reible
• 金额: $ 23.87万
• 依托单位: UNIVERSITY OF TEXAS AT AUSTIN
• 依托单位国家: 美国
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-09-27 至 2010-08-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/7501342
• 关键词: Aerobic; Animals; Area; Aromatic Hydrocarbons; Aromatic Polycyclic Hydrocarbons; Benzene; Biological; Body Water; Collection; Condition; Containment; Effectiveness; Environment; Environmental sludge; Ethylene; Exhibits; Exposure to; Food Chain; Gases; Goals; Health; Human; In Situ; Intercellular Fluid; Invasive; Iron; Liquid substance; Metals; Molecular Weight; Mono-S; Naphthalene; Naphthalenes; Nutrient; Permeability; Phase; Polychlorinated Biphenyls; Reagent; Research; Research Personnel; Residual state; Risk; Site; Solid; Solvents; Technology; Testing; Tetrachloroethylene; Toluene; Water; Wood material; Xylene; aquatic organism; aqueous; clay; dechlorination; design; electron donor; experience; innovation; microbial; migration; nano; nanoscale; novel; phenanthrene; receptor; remediation; wasting

DESCRIPTION (provided by applicant): Many of the most challenging contaminated sediment sites awaiting effective remediation exhibit separate phase contamination (nonaqueous phase liquids or NAPLs), or mobile aromatic or chlorinated solvents. Conventional sediment remedial approaches, including dredging and capping, are not designed nor effective for the management of fluid phase contaminants. The use of a low permeability cap provides opportunities to control contaminant migration and simultaneously introduce treatment in the underlying sediment without loss of reagent or contaminant. Further, by maintaining hydraulic control, the contaminants or the treated residual can be funneled to a relatively small area, or "gate", for further treatment of any residual contamination. The proposed research is designed to develop this novel remedial approach that is an adaptation of proven funnel and gate technologies for groundwater control. Specific treatment technologies to be evaluated and developed include the use of organoclays for the sorption and stabilization of NAPLs, zero-valent iron for the reductive dechlorination of chlorinated solvents and enhanced biological treatment for the control of both aromatic and chlorinated solvents. The project will test the broad hypotheses that A funneling cap can effectively contain contaminants as well as introduced reagents beneath the cap and effectively channel interstitial fluids (water or NAPL) to a collection or treatment gate Slurries of treatment media, specifically organo-modified clays for NAPL stabilization, zero valent iron for encouragement of reductive dechlorination, or reagents encouraging biological degradation, can be introduced beneath a low permeability cap and stabilize or encourage reductive treatment of non aqueous and aqueous contaminants Treatment gates composed of reactive materials or encouraging biological degradation, either alone or in combination, can effectively manage residual contamination from the in-situ treatment zone The primary goal of the proposed research is control of exposure and risk to human health and the environment at the sediment-water interface. The resulting reduction in exposure and risk to benthic and aquatic organisms will eliminate human food chain exposure to contaminants in sediments.

描述（由申请人提供）： 等待有效补救的许多最具挑战性的污染沉积物地点表现出单独的相污染（非水相或NAPL）或移动芳香族或氯化溶剂。常规的沉积补救方法（包括疏g和封盖）不是设计和有效的流体相污染物的设计和有效的。使用低渗透率盖可提供控制污染物迁移的机会，并同时在潜在的沉积物中引入治疗，而不会损失试剂或污染物。此外，通过保持液压控制，可以将污染物或处理过的残留物漏斗到相对较小的面积或“栅极”，以进一步治疗任何残留污染。拟议的研究旨在开发这种新颖的补救方法，该方法是对地下水控制的经过验证的漏斗和门技术的适应。要评估和开发的特定处理技术包括使用有机塑料用于吸附和稳定NAPL，零价铁用于还原氯化溶剂的氯化和增强的生物处理，以控制芳香族和氯化的溶液。该项目将检验广泛的假设，即漏斗盖可以有效地含有污染物，并在盖子下引入试剂，并有效地将间质液（水或NAPL）引导到治疗培养基的收集或处理门浆中，特异性有机体修饰的凝胶，以鼓励NAPL稳定性，以鼓励零用的生物，或者介绍了零用的生物，或者是零用的，或者是为了鼓励脱离的脱离劳动力，或者是零用的。在低渗透率盖的下方并稳定或鼓励减少对由反应性材料组成的非水性和水性污染物的治疗门，或者鼓励单独或组合使用生物学降解，可以有效地管理拟议研究区域研究区域的主要污染，而拟议的研究的主要目标是对人类健康和局部的风险进行曝光和风险在序列中的风险。底栖生物和水生生物的暴露和风险降低将消除人类食物链暴露于沉积物中的污染物。