Federal Institute of Education Science and Technology of Brasilia-IFB, Subcentro Leste-Complexo Boca da Mata, 02, Samambaia Sul, Brasilia 72302-300, Brazil.
Laboratory of Inorganic and Materials (LIMA), Chemistry Institute, University of Brasilia-UNB, Brasilia 70904-970, Brazil.
Int J Environ Res Public Health. 2022 Aug 15;19(16):10054. doi: 10.3390/ijerph191610054.
The presence of polycyclic aromatic hydrocarbons (PAHs) on firefighters' personal protective equipment is a concern. One form of preventing from these compounds is to decontaminate proximity firefighting protective clothing (PFPC). Traditional decontamination methods do not promote total removal of pollutants and alter the properties of PFPC. The objective of this work was to evaluate the effectiveness of white light-photolysis (WLP), an advanced oxidation process (AOP), for removing PAHs from PFPC, while maintaining the integrity of the fabric fibers. Experiments were carried out, varying reaction time and concentration of HO. With WLP (without HO), it was possible to remove more than 73% of the PAHs tested from the outer layer of PFPC in 3 days. The WLP provided the greatest removal of PAHs, compared with the most common mechanical decontamination techniques (laundering and wet-soap brushing). The fibers' integrity after exposure to the white light was evaluated with infrared spectroscopy and scanning electron microscopy/energy dispersive X-ray spectrometry. In addition, a tearing strength test was performed. No remarkable fabric degradation was observed, indicating a possible, routine-compatible, simple, and inexpensive method of decontamination of PFPC, based on photolysis, which is effective in the degradation of PAHs and maintains the integrity of fabric fibers.
消防队员个人防护设备上多环芳烃（PAHs）的存在令人担忧。防止这些化合物的一种方法是对接近灭火防护服（PFPC）进行去污。传统的去污方法不能完全去除污染物，并且会改变 PFPC 的性能。本工作的目的是评估使用白光光解（WLP），一种高级氧化工艺（AOP），从 PFPC 上去除 PAHs 的有效性，同时保持织物纤维的完整性。进行了实验，改变了反应时间和 HO 的浓度。在没有 HO 的情况下，WLP 可以在 3 天内从 PFPC 的外层去除超过 73%的测试 PAHs。与最常见的机械去污技术（洗涤和湿皂刷）相比，WLP 提供了对 PAHs 的最大去除效果。用红外光谱和扫描电子显微镜/能量色散 X 射线光谱评估了暴露在白光下后纤维的完整性。此外，还进行了撕裂强度测试。未观察到明显的织物降解，表明基于光解的 PFPC 去污可能是一种常规兼容、简单且经济的方法，该方法在 PAHs 的降解方面非常有效，并且能保持纤维的完整性。
