Downloads provided by UsageCounts
handle: 10261/379235
Abstract. BTEX (benzene, toluene, ethylbenzene, and m-xylene,p-xylene, and o-xylene) are significant urban air pollutants. This study examines BTEX variability across 7 European countries using data from 22 monitoring sites in different urban settings (urban background, traffic, industry, and suburban background). Results indicate that the relative abundance of BTEX in urban areas follows the order toluene > benzene > m,p-xylene > o-xylene > ethylbenzene, with median mixing ratios of 266 ± 152, 163 ± 74, 129 ± 88, 53 ± 35, and 45 ± 27 ppt during the years 2017–2022, respectively. Seasonal trends show benzene had similar median concentrations across urban background, traffic, and industrial sites, indicating mixed sources. Toluene levels were highest in traffic and industrial areas, highlighting road traffic and industrial emissions. Ethylbenzene and xylenes showed equivalent levels in traffic and industrial areas but were lower in urban backgrounds. Peak BTEX levels occurred during morning and evening rush hours, linked to traffic, heating, and atmospheric stagnation. B/T ratios ranged from 0.29 ± 0.11 to 1.35 ± 0.95, and X/E ratios ranged from 1.75 ± 0.91 to 3.68 ± 0.30, indicating primary pollution from local traffic, followed by solvents, coatings, and biomass burning. Lifetime cancer risk from BTEX exposure was below the definite risk threshold (10−4) but above the permissible risk level (10−6), suggesting moderate risk from benzene and ethylbenzene, particularly in traffic and industrial areas. Additionally, the health index of BTEX at monitoring sites was generally lower than the threshold limit value, suggesting a low non-carcinogenic risk overall. This study offers essential insights into BTEX pollution in urban European environments.
Chemistry, Make cities and human settlements inclusive, safe, resilient and sustainable, Take urgent action to combat climate change and its impacts, BTEX (benzene, toluene, ethylbenzene, and m-xylene,p-xylene, and o-xylene), Physics, QC1-999, Air pollution, http://metadata.un.org/sdg/13, http://metadata.un.org/sdg/3, http://metadata.un.org/sdg/11, QD1-999, Ensure healthy lives and promote well-being for all at all ages
Chemistry, Make cities and human settlements inclusive, safe, resilient and sustainable, Take urgent action to combat climate change and its impacts, BTEX (benzene, toluene, ethylbenzene, and m-xylene,p-xylene, and o-xylene), Physics, QC1-999, Air pollution, http://metadata.un.org/sdg/13, http://metadata.un.org/sdg/3, http://metadata.un.org/sdg/11, QD1-999, Ensure healthy lives and promote well-being for all at all ages
| selected citations These citations are derived from selected sources. This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | 14 | |
| popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network. | Top 10% | |
| influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | Average | |
| impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network. | Top 10% |
| views | 13 | |
| downloads | 4 |

Views provided by UsageCounts
Downloads provided by UsageCounts