Li, Zhiyong published the artcileOPEN ACCESS sources and health risks of PM 2.5 -bound PAHs in a small city along with the “clean heating” policy, Recommanded Product: Coronene, the publication is Aerosol and Air Quality Research (2022), 22(7), 220162, database is CAplus.
Levels, composition, and sources of PM2.5-bound polycyclic aromatic hydrocarbons (PAHs) vary significantly along with the “Clean Heating” (CH) policy in Beijing-Tianjin-Hebei (BTH) region, whereas the PAH characteristics with CH in small cities still remain unclear. A field observation was conducted in Baoding City, a small city within the BTH region, in winter of 2019 covering both the pre-heating season (PHS) and the heating season (HS). From the PHS to the HS, the mean concentrations for both PM2.5 and ¡Æ18PAHs increased from 69.1 to 125.0 ¦Ìg m-3 and from 8.09 to 26.2 ng m-3 due to the heating activities. The far lower PAHs in this study than those of small cities before CH implementation indicated the CH effectiveness. Higher diagnostic ratios (DRs) of FA/(FA + PY), BaA/(BaA + CHR), and IP/(IP + BgP) in the HS were in agreement with the increased coal/biomass usage. Pos. matrix factorization (PMF) demonstrated that biomass/natural-gas burning (BNGB) contributed most to PAHs of 36.9% in the HS, the increased natural gas (NG) usage for heating should be responsible for this contribution due to the policies of biomass-burning prohibition and ¡äCoal to Gas¡ä. Coal combustion (CC) shares increased by 152% in the HS despite the ¡äCoal Banning¡ä project. Again, the medium-mol.-weight PAHs (MMW-PAHs) increased most by 400% in the HS, evidencing the increased impacts of fossil-fuel consumptions. As an indicator for carcinogenic risk, BaP increased from 0.937 in the PHS to 1.29 ng m-3 in the HS. Furthermore, the incremental lifetime cancer risks (ILCR) and BaP equivalent concentrations (BaPeq) increased in the HS. The mean ILCR values of 1.15 x 10-6 for adults in the HS exceeded the threshold of 1 x 10-6 , while they were lower than 1 x 10-6 for children in both the PHS and the HS, and adults in the PHS due to the CH pos. effects.
Aerosol and Air Quality Research published new progress about 191-07-1. 191-07-1 belongs to catalysis-chemistry, auxiliary class Electronic Materials, name is Coronene, and the molecular formula is C24H12, Recommanded Product: Coronene.
Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia