The Effect of Surfactants on Bacterial Transport in Porous Media

9710301 Jaffe这是一个奖项，以支持研究和有关的影响，表面活性剂对提高移动的细菌悬浮在水中通过多孔介质。 实验研究计划涉及表面活性剂的分子结构和浓度在水中对细菌细胞表面电荷和疏水性的影响。 将进行额外的实验，以确定在将胶体过滤理论应用于细菌通过土壤的运动时，表面活性剂对碰撞效率因子的影响，从而将细菌通过砂柱的运动联系起来。 这项实验工作将提供一个数学公式的框架，可用于工程设计的系统净化土壤和适当驯化的微生物引入到一个羽状污染水的净化。 向地下水中引入表面活性剂有可能显著影响土壤中细菌的运输。 该项目的结果预计将提供一种手段来预测细菌在土壤中的迁移特性，因为它们受到表面活性剂的影响。 这方面的知识可应用于评估政策，有意和无意地引入表面活性剂的地下水，设计系统，以科普污染的地下水羽流，如污水流从化粪池和设计系统，以净化土壤使用适当驯化的细菌。 ***

9710301 Jaffe This is an award to support research on and relating to the effects that surfactants have on enhancing the movement of bacteria suspended in water through porous media. Experimental investigations are planned to relate the molecular structure of surfactants and concentration in water to their effects on bacterial cell surface charge and hydrophobicity. Additional experiments will be conducted to relate movement of bacteria through sand columns for determination of the effect that surfactants have on the collision efficiency factor in applying colloid filtration theory to movement of bacteria through soil. This experimental work will provide the framework for a mathematical formulation that may be used in engineering design of systems for decontamination of soil and for introduction of appropriately acclimated microorganisms into a plume of contaminated water for its decontamination. The introduction of surfactants to groundwater has the potential for significantly affecting the transport of bacteria in soil. Results of this project are expected to provide a means for predicting characteristics of bacterial transport in soil as they are influenced by surfactants. This knowledge may be applied in assessment of policies for intentional and unintentional introduction of surfactants to groundwater, design of systems to cope with contaminated plumes of groundwater such as wastewater streams from septic tanks and for design of systems to decontaminate soil using appropriately acclimated bacteria. ***