| Autor: |
Arouca AM; Federal Institute of Education Science and Technology of Brasilia-IFB, Subcentro Leste-Complexo Boca da Mata, 02, Samambaia Sul, Brasilia 72302-300, Brazil., Aleixo VED; Laboratory of Inorganic and Materials (LIMA), Chemistry Institute, University of Brasilia-UNB, Brasilia 70904-970, Brazil., Vieira ML; National Institute of Criminalistics, Brazilian Federal Police, SAIS Quadra 07 Lote 23, Brasilia 70610-200, Brazil., Talhavini M; National Institute of Criminalistics, Brazilian Federal Police, SAIS Quadra 07 Lote 23, Brasilia 70610-200, Brazil., Weber IT; Laboratory of Inorganic and Materials (LIMA), Chemistry Institute, University of Brasilia-UNB, Brasilia 70904-970, Brazil. |
| Abstrakt: |
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 H 2 O 2 . With WLP (without H 2 O 2 ), 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. |
