TRANSPORT OF BIOCOLLOIDS IN THE SUBSURFACE

生物胶体在地下的传输

• 批准号: 3840839
• 负责人: CHARLES P GERBA
• 金额: --
• 依托单位: UNIVERSITY OF ARIZONA
• 依托单位国家: 美国
• 资助国家: 美国
• 起止时间: 至
• 项目状态: 未结题
• 来源: https://reporter.nih.gov/project-details/3840839
• 关键词: Bacillus; Bacillus subtilis; Pseudomonas; adsorption; bioreactors; biotransformation; cell adhesion; cell wall; colloids; environmental contamination; environmental engineering; environmental toxicology; flow cytometry; humidity; hydropathy; mathematical model; microcapsule; microorganism interaction; soil; soil microbiology; spores; surface property; waste treatment; water flow

The overall aim of this project is to increase the transport of microorganisms through subsurface environments to facilitate the introduction of novel metabolic traits and the degradation of widely dispersed environmental pollutants. To achieve this aim, we will concentrate our efforts on three tasks: (1) enhance microbial transport by modifying the surface of the cell to reduce attachment to soil particles (Enhanced transport); (2) examine the effect of low water velocities and flow through water-unsaturated media on microbial transport, (Vadose zone transport); (3) conduct large-bore soil column and lysimeter experiments to determine if results of soil column experiments are accurate and predictive of large scale processes (Scaling study). There will be a complimentary modeling component for three tasks of this project. Our focus on transport through unsaturated media is in keeping with the overall theme for the hydrology component of our hazardous-waste center. The site core, which will consist of intermediate-scale facilities for integrated transport, chemical and biological experiments, will give us the ability to undertake vadose-zone studies at larger scales. The other two hydrology projects, which involve studying transport of trace metals and organic contaminants in the presence of natural-organic matter colloids, also will have a vadose-zone emphasis.

该项目的总体目标是增加交通运输 微生物通过地下环境以促进 新的代谢特征的引入和广泛的降解 环境污染物分散。 为了实现这一目标，我们将 重点做好三项工作：（1）加强微生物运输 修改细胞表面以减少对土壤颗粒的附着 （增强运输）； (2) 检验低水速的影响 流过水不饱和介质进行微生物运输，（Vadose 区域 运输）; (3) 进行大口径土柱和蒸渗仪实验 确定土柱实验的结果是否准确且具有预测性 大规模过程（规模研究）。 将会有免费赠送 该项目的三个任务的建模组件。 我们专注于运输 通过不饱和的媒体符合整体主题 我们危险废物中心的水文部分。 网站核心， 将包括中等规模的综合交通设施， 化学和生物实验，将使我们有能力进行 更大规模的渗流区研究。 另外两个水文项目， 其中涉及研究微量金属和有机污染物的传输 在天然有机物质胶体存在的情况下，也会产生 渗流区强调。