Controlled Release Polymer Structures for In Situ Chemical Oxidation of Contaminated Groundwater

用于受污染地下水原位化学氧化的控释聚合物结构

• 批准号: 9138910
• 负责人: Alexis Wells Carpenter
• 金额: $ 22.47万
• 依托单位: AXNANO, LLC
• 依托单位国家: 美国
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-09-30 至 2018-03-29
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/9138910
• 关键词: Aging; American; Aromatic Polycyclic Hydrocarbons; Biodegradation; Characteristics; Chemicals; Chemistry; Chlorinated Hydrocarbons; Collaborations; Communities; Complex; Dose; Ecosystem; Encapsulated; Ensure; Environment; Environmental Health; Environmental Pollution; Evaluation; Formulation; Funding; Hazardous Waste Sites; Human; In Situ; Industry; Injection of therapeutic agent; Kinetics; Legal patent; Liquid substance; Marketing; Methods; Modeling; North Carolina; Oxidants; Performance; Phase; Polymers; Preparation; Process; Research Infrastructure; Risk; Safety; Services; Site; Small Business Technology Transfer Research; Societies; Solid; Solvents; Source; Specialty Uses of Chemicals; Structure; Superfund; System; Techniques; Technology; Temperature; Testing; United States Environmental Protection Agency; Water; Work; base; contaminated water; controlled release; cost; density; design; field study; global environment; hazard; innovation; manufacturing scale-up; oxidation; programs; prototype; public health relevance; remediation; research study; response; scale up; superfund site

 DESCRIPTION (provided by applicant): The EPA estimates that one out of every four Americans lives within three miles of a hazardous waste site. Over 450,000 brownfield sites are awaiting remediation and 1,280 sites on the National Priorities List. Potential Responsible Parties or the Superfund program are tasked with remediating these sites, but insufficient funding and growing number of sites have led to significant delays. The US remediation market has been growing steadily since 2009, averaging 2-3% increases per year, and the global environmental remediation technology market is forecasted to expand to $80.5 billion in 2019. Clearly there is a societal need and market potential for innovative remediation technologies that decrease cost and increase efficacy. In Situ Chemical Oxidation (ISCO) is the fastest growing remediation technique as it is lower cost, more effective, and less disruptive than other methods. However, current ISCO methods require gaseous or liquid-form oxidizers that pose significant hazard to workers during transport and delivery and often require multiple injections, which increase cost and exposure risk. AxNano, in collaboration with North Carolina A&T, has developed Controlled Release Polymer Structures (CRPS) as a slow release ISCO technology that will transform the environmental remediation industry by: (1) mitigating exposure risk during deployment by encapsulating the reactive agents within a safe, easy to handle, solid matrix; (2) allowing for efficient treatment of contaminated groundwater via sustained release of high doses of reactive agents with a single application. This Phase I project will determine design parameters to enhance the efficacy of our patented CRPS for ISCO remediation of contaminated groundwater. The CRPS will be optimized by maximizing the oxidative agent(s) loading while maintaining a stable solid structure. Proof-of-concept tests will be conducted under varied conditions (i.e., pH, temperature, and density) in dynamic flow column studies that mimic those present in the subsurface environment. Broad spectrum efficacy of the optimized CRPS to transform two classes of Superfund-relevant contaminants (i.e., chlorinated compounds and polyaromatic hydrocarbons), will be tested over a range of concentrations to yield dose response curves. Collectively, the results of this Phase I will be used to model the performance of these materials in realistic environments and guide planning of pilot scale field studies. Phase I work will also involve designing a plan for scale-up manufacturing and preparing for pilot field testing. Scale-up design, cost of manufacturing, and deployment strategies of this solid phase material compared to current liquid and gaseous ISCO remediation technologies will also be evaluated in order to determine the feasibility of transitioning this technology to a commercial product.

 描述（由申请人提供）：美国环保局估计，四分之一的美国人居住在距离危险废物场三英里的范围内。超过 450,000 个棕地正在等待修复，1,280 个棕地被列入国家优先事项清单。潜在责任方或超级基金计划的任务是修复这些场地，但资金不足和场地数量不断增加导致了严重的延误。美国修复市场自2009年以来一直稳定增长，平均每年增长2-3%，预计2019年全球环境修复技术市场将扩大至805亿美元。显然，社会对降低成本、提高功效的创新修复技术存在需求和市场潜力。原位化学氧化 (ISCO) 是发展最快的修复技术，因为与其他方法相比，它成本更低、更有效且破坏性更小。然而，目前的 ISCO 方法需要气态或液态氧化剂，这些氧化剂在运输和交付过程中对工人构成重大危险，并且通常需要多次注射，这增加了成本和暴露风险。 AxNano 与北卡罗来纳州 A&T 合作，开发了控释聚合物结构 (CRPS) 作为一种缓释 ISCO 技术，该技术将通过以下方式改变环境修复行业：(1) 通过将反应剂封装在安全、易于处理的固体基质中，减轻部署过程中的暴露风险； (2) 通过单次持续释放高剂量的反应剂，可以有效处理受污染的地下水。 该第一阶段项目将确定设计参数，以提高我们的专利 CRPS 对受污染地下水进行 ISCO 修复的功效。 CRPS 将通过最大化氧化剂负载同时保持稳定的固体结构来优化。概念验证测试将在模拟地下环境的动态流柱研究中的不同条件（即 pH、温度和密度）下进行。优化的 CRPS 转化两类超级基金相关污染物（即氯化化合物和多环芳烃）的广谱功效将在一定浓度范围内进行测试，以产生剂量响应曲线。总的来说，第一阶段的结果将用于模拟这些材料在现实环境中的性能，并指导中试规模现场研究的规划。第一阶段的工作还将包括设计扩大生产计划和准备试点现场测试。与当前液态和气态 ISCO 修复技术相比，还将评估这种固相材料的放大设计、制造成本和部署策略，以确定将该技术转化为商业产品的可行性。