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（由适用提供）：EPA估计每四个美国人中有一个居住在危险废物现场的三英里以内。超过450,000个棕地网站正在等待补救，在国家优先级列表中有1,280个网站。潜在的负责方或超级基金计划的任务是对这些站点进行补救，但是资金不足和越来越多的站点导致了重大延误。自2009年以来，美国的补救市场一直在悄悄地增长，平均每年增长2-3％，预计全球环境补救技术市场将在2019年扩大到805亿美元。显然，社会需求和市场潜力降低了创新的补救技术，从而降低了成本并提高了有效性。原位化学氧化（ISCO）是增长最快的补救技术，因为它比其他方法较低，更有效且破坏性更低。但是，当前的ISCO方法需要气态或液体形成氧化剂，在运输和交付过程中对工人构成重大危害，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，已经开发了受控的释放聚合物结构（CRP），作为一种缓慢释放的ISCO技术，它将通过以下方式改变环境修复行业：（1）通过以下方面通过在安全，易于处理的安全性，易于处理的情况下封装反应剂在部署过程中的暴露风险； （2）允许通过使用单个应用持续释放高剂量的反应性剂来有效治疗受污染的地下水。该阶段I项目将确定设计参数，以提高我们专利的CRP的效率，以修复受污染的地下水。 CRP将通过在保持稳定的固体结构的同时最大化氧化剂加载来优化CRP。概念验证测试将在模仿地下环境中存在的动态流柱研究中在各种条件（即pH，温度和密度）下进行。优化的CRP的广泛光谱效率将在一系列浓度上进行测试，以转化两类超级基金污染物（即氯化化合物和多芳烃），以产生剂量响应曲线。总的来说，该阶段I的结果将用于对这些材料的性能进行建模，并在实现环境中指导量表现场研究的规划。第一阶段的工作还将涉及设计一项计划进行扩展制造和准备试验现场测试的计划。还将评估该固相材料的规模设计，制造成本以及与当前的液体和气体ISCO补救技术相比，还将评估该固相材料的部署策略，以确定将该技术转换为商业产品的可行性。