For the first time, this study presents gaseous and particulate-bound (PM) polycyclic aromatic hydrocarbons (PAHs) in ambient air samples collected from eight major cities of Pakistan. Diurnal air samples (gaseous and PM) were collected in summer 2014 on polyurethane foam and quartz fiber filters using high volume-active air sampler. The US-EPA enlisted 16 priority PAHs in particulate and gaseous phase were measured on gas chromatograph equipped with mass spectrometer detector. The total PAHs concentrations ranged between 188 pg m (in Gilgit), and 2340 pg m (in Lahore). The decreasing order of PAHs concentrations in various cities was in the following order: Lahore > Rawalpindi > Multan > Faisalabad > Karachgi > Peshawar > Quetta > Gilgit. Phenanthrene showed the highest concentration, accounted 18% of total PAHs followed by fluoranthene (12% of total PAHs). This study showed that the gaseous fractions were predominant in the ambient air. Source apportionment analysis revealed that biomass combustion, vehicular emissions and diesel combustion in power generators were the potential PAHs emissions sources. The lifetime lungs cancer risk (LLCR) was in the range of 8.28 × 10 to 2.09 × 10 depicting mild cancer risk to the residents on exposure to atmospheric PAHs. Therefore, it is recommended to monitor atmospheric PAHs throughout the year and also adopt environmentally friendly fuels to reduce PAHs pollution and health risks in the country.
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http://dx.doi.org/10.1016/j.chemosphere.2021.129811 | DOI Listing |
J Hazard Mater
December 2024
Post-graduation program in Ecology and Biodiversity Conservation, Federal University of Mato Grosso (UFMT), Mato Grosso, MT 78060-900, Brazil; Post-graduation program in Ecology. Department of Ecology and Zoology, Laboratory of Freshwater Biodiversity, Federal University of Santa Catarina (UFSC), Florianópolis, SC 88040-900, Brazil.
The frequency and intensity of wildfires have been increasing in many parts of the world, which may result in biodiversity loss. Wildfires can devastate plant communities, generating toxic ash that pollutes watercourses through runoff. However, our understanding of the effects of ash exposure on aquatic biodiversity is still limited.
View Article and Find Full Text PDFHarm Reduct J
December 2024
Department of Pharmaceutical Health Outcomes and Policy, University of Houston College of Pharmacy, Health 2 Building, 4349 Martin Luther King Boulevard, Houston, TX, 77204-5047, USA.
Introduction: Despite the established effectiveness and relatively widespread availability of Medications for Opioid Use Disorder, individuals seeking treatment frequently encounter various structural and social barriers, including costs of treatment. This study aimed to understand the financial barriers that affect treatment continuation in individuals with opioid use disorder (OUD).
Methods: In this qualitative study, seven semi-structured in-depth focus group interviews were conducted among 28 participants in treatment for OUD.
Sci Total Environ
December 2024
Institute of Chemistry and Processes for Energy, Environment and Health ICPEES UMR 7515, University of Strasbourg, F-67087 Strasbourg Cedex 3, Strasbourg, France. Electronic address:
Caltech Active Strand Cloudwater collectors are used to collect valley fog samples from Mount and North-Lebanon during 2021 for the speciation of organic matter for the first time ever. Numerous compounds including pesticides, phenols, acids, and persistent organic pollutants such as polychlorinated biphenyls (PCBs), organochlorine pesticides (OCPs), and polycyclic aromatic hydrocarbons (PAHs) have been identified in fogwater samples. They are extracted using the liquid-liquid extraction performed on the XTR chromabond columns.
View Article and Find Full Text PDFPeerJ
December 2024
Frontier Science Center for Deep Ocean Multispheres and Earth System (FDOMES) and Physical Oceanography Laboratory, Ocean University of China, Qingdao, Shandong Province, China.
To investigate the pollution characteristics of polycyclic aromatic hydrocarbons (PAHs) indoors and outdoors and their influencing factors, PM samples were systematically collected from both environments in Jinan during the summer and autumn seasons. During the observation period, the concentration of ∑ 19PAHs was 18.57 ± 10.
View Article and Find Full Text PDFDrug Des Devel Ther
December 2024
Department of Pharmaceutical Analysis, School of Pharmacy, Fujian Medical University, Fuzhou, 350122, People's Republic of China.
Cryptotanshinone (CTS) is an important active ingredient of Bge. In recent years, its remarkable pharmacological effects have triggered extensive and in-depth studies. The aim of this study is to retrieve the latest research progress on CTS and provide prospects for future research.
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