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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

基本信息

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
项目类别：
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

项目摘要

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.