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）：美国环保署估计，每四个美国人中就有一个生活在危险废物场三英里范围内。超过450，000个布朗菲尔德场地正在等待补救，1，280个场地在国家优先事项清单上。潜在的责任方或超级基金计划的任务是修复这些网站，但资金不足和网站数量的增加导致了重大延误。自2009年以来，美国的修复市场一直在稳步增长，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到805亿美元。显然，社会需要和市场潜力需要创新的补救技术，以降低成本和提高效率。原位化学氧化（ISCO）是发展最快的修复技术，因为它比其他方法成本更低，更有效，破坏性更小。然而，目前的ISCO方法需要气体或液体形式的氧化剂，这些氧化剂在运输和交付过程中对工人造成重大危害，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来降低部署期间的暴露风险;（2）允许通过单次施用持续释放高剂量的反应剂来有效处理受污染的地下水。 第一阶段项目将确定设计参数，以提高我们获得专利的CRPS在ISCO修复受污染地下水方面的功效。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。概念验证测试将在各种条件下进行（即，pH值、温度和密度），模拟地下环境中的动态流柱研究。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），将在一定浓度范围内进行测试，以得出剂量反应曲线。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，并指导中试规模实地研究的规划。第一阶段的工作还将包括设计一项扩大生产规模的计划和准备进行试点实地测试。与目前的液体和气体ISCO补救技术相比，还将评估这种固相材料的规模化设计、制造成本和部署策略，以确定将这种技术过渡到商业产品的可行性。