The Effect of Surfactants on Bacterial Transport in Porous Media

9710301 Jaffe该奖项旨在支持有关表面活性剂增强悬浮在水中的细菌通过多孔介质移动的影响的研究。实验研究计划将表面活性剂的分子结构和水中浓度与它们对细菌细胞表面电荷和疏水性的影响联系起来。在将胶体过滤理论应用于细菌通过土壤的运动时，将进行额外的实验，以确定表面活性剂对碰撞效率因子的影响。这项实验工作将为数学公式提供框架，可用于土壤净化系统的工程设计和将适当适应的微生物引入受污染的水体以进行净化。将表面活性剂引入地下水有可能显著影响土壤中细菌的迁移。该项目的结果有望为预测细菌在土壤中受表面活性剂影响的迁移特性提供一种方法。这些知识可以应用于评估有意和无意向地下水引入表面活性剂的政策，设计处理污水池等地下水污染流的系统，以及设计使用适当适应的细菌净化土壤的系统。＊＊＊

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. ***