SusChEM GOALI: Transformative Approach to Sustain Potable Water Infrastructure: Fundamental Mechanisms of In-Situ Autogenous Repair

SusChEM 目标：维持饮用水基础设施的变革方法：原位自修复的基本机制

• 批准号: 1336616
• 负责人: Marc Edwards
• 金额: $ 53.04万
• 依托单位: Virginia Polytechnic Institute and State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-10-01 至 2017-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1336616&HistoricalAwards=false
• 关键词: SusChEM; GOALI; Transformative; Approach; Sustain

CBET 1336616Marc EdwardsVirginia TechAs the nation's aging potable water pipeline systems fall deeper into disrepair, and costs of traditional pipe replacement increasingly dwarf societal abilities to pay for upgrades, innovative approaches to sustain pipeline assets are urgently needed. We have discovered that our existing pipe materials (i.e., iron, cement, and copper) have a remarkable ability for autogenous leak self-repair that has heretofore been unexploited, providing possible approaches to pipeline restoration at costs orders of magnitude lower than conventional alternatives. Our ultimate objective is to rationally engineer the chemistry of drinking water to seal existing leak-holes formed in existing materials via clogging with waterborne and/or water-formed particles. A laboratory phase of research establishes fundamental mechanisms of (1) leak clogging by model particulates commonly found in water distribution systems, (2) "smart" precipitation of crystalline CaCO3(s) in leak-holes, and (3) metallic corrosion as a pathway for repairing leaks. Parallel large-scale application of the approach to extend the lifetime of New York City's iconic Delaware Aqueduct will provide valuable data and insights to both leak clogging and "smart precipitation."This research is the first to demonstrate that existing leaks in aged pipelines do not inevitably grow to failure, but can actually provide a pathway to self-repair via water chemistry. Such low cost, environmentally friendly solutions to one of the most urgent infrastructure problems facing the developed world, has the potential to save tens of billions of dollars per year in reduced damages, water loss, and capital expenditures. Repair of leaks enhances water conservation/sustainability and protects public health by reducing the likelihood of contaminant influx into pipelines. After more than a century of research aimed at minimizing problems with corrosion, scaling and particle formation in potable water systems at every opportunity, the possibility that these processes can be beneficially exploited to repair existing pipelines would represent a true paradigm shift. The basic science and concepts also have direct linkages to economically sustaining other decaying infrastructure assets including sewage pipelines and concrete structures.

CBET 1336616MARC EDWARDSVIRGINIA TECHAS国家老化的饮用水管道系统更深入地失修，传统管道替代的成本越来越多，越来越矮人的社会能力以支付升级的升级，而创新的方法是维持管道资产的创新方法。我们发现，我们现有的管道材料（即铁，水泥和铜）具有显着的自动泄漏自我修复能力，但迄今未经开发的能力，提供了可能以比常规替代方案低的数量级恢复管道恢复的方法。我们的最终目标是合理地设计饮用水的化学，以密封现有材料中的现有泄漏孔，这些漏水被用水和/或水形成颗粒堵塞。 研究的实验室阶段建立了（1）（1）在水分配系统中通常发现的模型堵塞的基本机制，（2）（2）泄漏孔中晶体CACO3（S）的“智能”沉淀，以及（3）金属腐蚀作为用于修复泄漏的途径。 该方法的平行大规模应用延长了纽约市标志性的特拉华州渡槽的生命周期，将为泄漏堵塞和“智能降水”提供有价值的数据和见解。这项研究是第一个研究表明，老年管道中现有的泄漏不可避免地会导致失败，但实际上可以通过水化学提供自我培养的途径。 对于发达国家面临的最紧迫的基础设施问题之一，这种低成本，环保的解决方案有可能节省每年数百亿美元的损害，水损失和资本支出。泄漏的维修可增强节水/可持续性，并通过减少污染物涌入管道的可能性来保护公共卫生。经过一个多世纪的研究，旨在最大程度地减少饮用水系统中腐蚀，缩放和颗粒形成问题的问题，因此可以利用这些过程来修复现有管道的可能性将代表真正的范式转移。 基础科学和概念还与经济上维持其他腐烂的基础设施资产（包括污水处理管道和混凝土结构）有直接联系。