| Title: | Polycyclic aromatic hydrocarbons in house dust and surface soil in major urban regions of Nepal: Implication on source apportionment and toxicological effect |
| Author(s): | Yadav IC; Devi NL; Li J; Zhang G; |
| Address: | "State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, PR China; Department of International Environmental and Agricultural Science (IEAS), Tokyo University of Agriculture and Technology (TUAT) 3-5-8, Saiwai-Cho, Fuchu-Shi, Tokyo 1838509, Japan. Electronic address: icyadav.bhu@gmail.com. Centre for Environmental Sciences, Central University of South Bihar, BIT Campus, Patna 800014, Bihar, India. State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, PR China" |
| DOI: | 10.1016/j.scitotenv.2017.10.313 |
| ISSN/ISBN: | 1879-1026 (Electronic) 0048-9697 (Linking) |
| Abstract: | "Urban centers have turned to be the provincial store for resource consumptions and source releases of different types of semi-volatile organic compounds (SVOCs) including polycyclic aromatic hydrocarbons (PAHs), bringing about boundless environmental pollutions, among different issues. Human prosperity inside urban communities is unambiguously dependent on the status of urban soils and house dusts. However, environmental occurrence and sources of release of these SVOCs are challenging in Nepalese cities, as exceptionally very limited data are accessible. This motivated us to explore the environmental fate, their source/sink susceptibilities and health risk associated with PAHs. In this study, we investigated the contamination level, environmental fate and sources/sink of 16 EPA's priority pollutants in surface soil and house dusts from four major cities of Nepal. Additionally, the toxicological effect of individual PAH was studied to assess the health risk of PAHs. Generally, the concentrations of summation operator(16)PAHs in surface soil were 1.5 times higher than house dust, and ranged 767-6770ng/g dry weight (dw) (median 1810ng/g dw), and 747-4910 dw (median 1320ng/g dw), respectively. High molecular weight-PAHs both in soil and dust were more abundant than low molecular weight-PAHs, suggesting the dominance of pyrogenic source. Moderate to weak correlation of TOC and BC with PAHs in soil and dust suggested little or no role of soil organic carbon in sorption of PAHs. Source diagnostic ratio and principal component analysis indicated fossil fuel combustion, traffic/vehicular emissions and combustion of biomass are the principal sources of PAHs contamination in Nepalese urban environment. The high average TEQ value of PAHs in soil than dust suggested high risk of soil carcinogenicity compared to dust" |
| Keywords: | China Cities Dust/*analysis *Environmental Monitoring Housing Incineration Motor Vehicles Nepal Polycyclic Aromatic Hydrocarbons/*analysis Soil/chemistry Soil Pollutants/*analysis Biomass combustion Persistent organic pollutants Petrogenic Principal compo; |
| Notes: | "MedlineYadav, Ishwar Chandra Devi, Ningombam Linthoingambi Li, Jun Zhang, Gan eng Netherlands 2017/11/08 Sci Total Environ. 2018 Mar; 616-617:223-235. doi: 10.1016/j.scitotenv.2017.10.313. Epub 2017 Nov 16" |
