Noh Yoorae, Xia Li, Zyaykina Nadezhda N, Boor Brandon E, Shannahan Jonathan H, Whelton Andrew J
Lyles School of Civil Engineering, Purdue University, 550 Stadium Mall Drive, West Lafayette, Indiana 47907, United States.
School of Health Sciences, Purdue University, 550 Stadium Mall Drive, West Lafayette, Indiana 47907, United States.
Environ Sci Technol Lett. 2023 Jan 20;10(2):152-158. doi: 10.1021/acs.estlett.2c00710. eCollection 2023 Feb 14.
Cured-in-place-pipe (CIPP) is an onsite plastic manufacturing technology used in the U.S. and has not been evaluated for regulatory compliance with federal air pollution laws. The practice involves the discharge of manufacturing waste into the environment. The study goal was to estimate the magnitude of volatile organic compounds (VOCs) discharged into the atmosphere for styrene and nonstyrene composite manufacture and examine low-cost air monitoring sensor reliability. Time-resolved emission analysis revealed that VOC emission was not only isolated to the thermal curing period but also occurred before and after curing. In addition to the styrene monomer, other gas-phase hazardous air pollutants regulated under the were also emitted. Based on typical CIPP installations, 0.9 to 16.6 U.S. tons of emitted VOCs were estimated for styrene CIPPs, and 0.09 to 1.6 U.S. tons of emitted VOCs were estimated for nonstyrene CIPPs. Because the number and size of CIPPs manufactured in a single community can vary, the total air pollution burden will significantly differ across communities. Low-cost VOC sensors commonly utilized near CIPP manufacturing activities did not accurately quantify styrene and should not be relied upon for that purpose. Up to several thousand-fold detection differences were observed. Regulatory evaluation of CIPP air pollution and PID sensor reliability assessments are recommended.
原位固化管道（CIPP）是一种在美国使用的现场塑料制造技术，尚未对其是否符合联邦空气污染法律进行监管评估。这种做法涉及将制造废物排放到环境中。该研究的目标是估计苯乙烯和非苯乙烯复合材料制造过程中排放到大气中的挥发性有机化合物（VOCs）的量，并检验低成本空气监测传感器的可靠性。时间分辨排放分析表明，VOC排放不仅局限于热固化阶段，在固化之前和之后也会发生。除了苯乙烯单体之外，《》规定的其他气相有害空气污染物也会排放。根据典型的CIPP装置，估计苯乙烯CIPP的VOC排放量为0.9至16.6美吨，非苯乙烯CIPP的VOC排放量为0.09至1.6美吨。由于单个社区中制造的CIPP数量和规模可能不同，各个社区的空气污染总负担会有显著差异。在CIPP制造活动附近普遍使用的低成本VOC传感器无法准确量化苯乙烯，因此不能依赖其进行此项工作。观察到检测差异高达数千倍。建议对CIPP空气污染进行监管评估并对PID传感器可靠性进行评估。
