SBIR Phase I: Transport of Colloidal Size Particles Through Porous Media - A New Approach for the Formation of Impermeable and Reactive Subsurface Barriers

*** 9660022 Hodko该项目描述了一种在土壤中形成不透水和/或反应性屏障的创新方法，可能应用于地球工程和环境净化技术。垂直地下屏障的安装是土木和采矿工程的标准做法，然而，原位建造水平（底部）屏障的方法尚未得到令人满意的发展。在所有水平屏障就位的应用中，主要的弱点是注浆承包商无法完全确定注入材料的范围和性质，即验证屏障材料的实际去向。很可能在土壤和地下水修复中接受任何地下屏障技术将取决于验证屏障连续性的能力。提出了一种新的方法来形成连续的水平和/或垂直地下屏障。将研究一个能够在受污染土壤中容纳和破坏有机污染物的水平屏障形成的例子。试验了胶结不渗透地下屏障和两种反应性渗透地下屏障形成的可行性。所开发的技术将对联邦政府大有用处，作为一种成本效益高的方法，可形成水力不渗透和渗透性反应性水平表面屏障，以遏制和破坏土壤和地下水中的有机污染物。拟议技术的最初市场可能是修复和维护地下垃圾填埋场的屏障，以及处理工业和军事场所受污染的地下水和土壤。＊＊＊

*** 9660022 Hodko This project describes an innovative method for the formation of impermeable and/or reactive barriers in soil with possible applications in geo-engineering and environmental cleanup technologies. The installation of vertical subsurface barriers is standard practice in civil and mining engineering, however, methods for in situ construction of horizontal (bottom) barriers have not yet been satisfactorily developed. The primary weakness in all applications of horizontal barrier emplacement Is the inability of grouting contractors to completely define the extent and nature of the injected materials, i.e., verification of where the barrier material actually went. It is likely that the acceptance of any subsurface barrier technology in soil and groundwater remediation will depend on the ability to verify the barrier continuity. A novel approach for the formation of continuous horizontal and/or vertical subsurface barriers is proposed. An example of the formation of horizontal barrier which will be capable of containing and destruction of organic contaminants in polluted soil will be investigated. The feasibility of formation of cementitious impermeable subsurface barrier and two types of reactive permeable subsurface barriers will be tested. The developed technology will be of considerable use to the Federal Government, as a cost effective method for the formation of both hydraulically impermeable and permeable reactive horizontal surface barriers for containment and destruction of organic pollutants in soil and groundwater. Initial markets for the proposed technology could be repair and maintenance of subsurface landfill barriers, and treatment of polluted groundwater and soil at both industrial and military sites. ***