Towards an Improved Understanding of Plastic Pollutant Generation and Minimization Processes for Cured-in-Place-Pipe Manufacture

提高对现场固化管道制造中塑料污染物产生和最小化工艺的理解

• 批准号: 2129166
• 负责人: Andrew Whelton
• 金额: $ 33万
• 依托单位: Purdue University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-08-01 至 2024-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2129166&HistoricalAwards=false
• 关键词: Towards; Improved; Understanding; Plastic; Pollutant

Water infrastructure is critical to the safety and economic health of communities. The restoration and maintenance of water supply and wastewater infrastructure are ongoing challenges for the Nation. Cured-in-place pipe (CIPP) technology is a popular method for repairing buried sewer pipes. This is due in large part to economic considerations, as it can be 60-80% less costly than other repair alternatives. Unfortunately, the process of emplacement and curing of new plastic inside the damaged pipe can release hazardous materials into the air. These releases have resulted in exposures, illnesses, and at least one fatality of a worker where chemical exposure was a significant contributing factor. The overall goal of this research is to reduce chemical volatilization from CIPP by understanding mechanisms of chemical volatilization. This goal will be achieved through specific research objectives designed to: i) determine the factors that control chemical emission under various curing techniques, ii) examine how injecting steam to create the CIPP impacts the distribution of emitted chemicals, and iii) estimate the toxicity reductions that could result from alterations in the process. Successful completion of this research will clarify how manufacturing processes influence the emission of chemicals from CIPP. This information can be used by regulators, public health professionals, and other stakeholders to develop policies and guidelines to minimize pollutant release and protect public health. This will be facilitated through direct engagement of stakeholders to disseminate the project findings and accelerate industry adoption. Further benefits to society result from a training module to assist user groups in making decisions regarding the use of CIPP for wastewater pipe upgrades.Sewer pipes are being repaired using CIPP technology to create a new plastic liner inside existing damaged pipes in situ. Dozens of chemical exposure incidents have been documented from CIPP utilization. Gaseous releases from CIPP are a complex mixture of volatile and semi-volatile organic compounds that are known to pose significant risks to human and ecological health. However, the underlying mechanisms and ways to reduce such emissions has been relatively understudied. The overall aim of this research is to elucidate mechanisms of CIPP emissions towards the goal of reducing pollution and protecting health. Specific objectives designed to achieve this goal are to: i) identify factors that control chemical emission distribution and magnitude for various CIPP formulations using various curing techniques, ii) explore how injected steam impacts the magnitude and distribution of emitted chemicals, and iii) study air exposure and associated toxicity reductions resulting from emission reduction control measures. Successful completion of this research will produce urgently needed data to prevent emissions and protect human health. Results have potential to transform the CIPP industry and broader plastic composites sector by providing fundamental knowledge on the roles resin, initiators, and steam curing have on pollutant emissions. This research directly addresses multiple National Academy of Science, Engineering, and Medicine grand challenges focused on restoring infrastructure, sustainably supplying water, building healthy cities, and reducing pollution.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

水基础设施对社区的安全和经济健康至关重要。供水和废水基础设施的恢复和维护是国家面临的挑战。固化管道（CIPP）技术是修复埋入的下水道管道的流行方法。这在很大程度上归因于经济考虑，因为它的成本可能比其他维修替代方案降低60-80％。不幸的是，在受损管道内部的新塑料的固化和固化过程可以将危险材料释放到空中。这些释放导致了暴露，疾病和至少一名工人的死亡，在该工人中，化学暴露是重要的因素。这项研究的总体目标是通过了解化学挥发的机制来减少CIPP的化学挥发。将通过旨在以下特定的研究目标来实现此目标：i）确定控制各种固化技术下化学排放的因素，ii）检查如何注入蒸汽来创建CIPP会影响发射化学品的分布，iii）估计可能因此过程中改变而导致的毒性降低。这项研究的成功完成将阐明制造过程如何影响CIPP的化学物质排放。该信息可以由监管机构，公共卫生专业人员和其他利益相关者使用，以制定政策和准则，以最大程度地减少污染物释放并保护公共卫生。这将通过直接参与利益相关者参与来传播项目发现并加速行业采用来促进这。培训模块对社会的进一步好处，以帮助用户群体做出有关使用CIPP进行废水管道升级的决策。正在使用CIPP技术对管道进行修复，以在现有损坏的管道原位创建新的塑料衬里。 CIPP利用中已经记录了数十起化学暴露事件。来自CIPP的气态释放是挥发性和半挥发性有机化合物的复杂混合物，已知对人类和生态健康构成重大风险。但是，减少这种排放的基本机制和方法相对研究。这项研究的总体目的是阐明CIPP排放机制，以减少污染和保护健康的目标。旨在实现此目标的特定目标是：i）确定使用各种固化技术控制化学发射分布和大小的因素，ii）探索蒸汽如何影响发射化学品的大小和分布，iii）研究空气暴露和相关的毒性降低，导致由排放减少控制控制测量导致的毒性降低。这项研究的成功完成将迫切需要数据，以防止排放并保护人类健康。结果有可能通过提供有关树脂，发起人和蒸汽固化对污染物排放的角色的基本知识来改变CIPP行业和更广泛的塑料复合材料行业。这项研究直接解决了多个国家科学，工程和医学学院的巨大挑战，重点是恢复基础设施，可持续地供水，建造健康的城市并减少污染。该奖项反映了NSF的法定任务，并被视为值得通过基金会的知识分子和更广泛影响的评估来通过评估来获得支持的审查审查审查标准。

项目成果

Pulmonary and neurological health effects associated with exposure to representative composite manufacturing emissions and corresponding alterations in circulating metabolite profiles

与接触代表性复合制造排放物以及循环代谢物谱的相应变化相关的肺和神经健康影响

• DOI: 10.1093/toxsci/kfad029
• 发表时间: 2023
• 期刊: Toxicological Sciences
• 影响因子: 3.8
• 作者: Xia, Li;Noh, Yoorae;Whelton, Andrew J;Boor, Brandon E;Cooper, Bruce;Lichti, Nathanael I;Park, Jae Hong;Shannahan, Jonathan H
• 通讯作者: Shannahan, Jonathan H