• 2016. A review on deposition of atmospheric PAHs and interaction with other environmental matrices and its source apportionment with respect to Indian scenario. (e-ijep.co.in)
  • 2011. Determination of polycyclic aromatic hydrocarbons (PAHs) in water and sediments of the Kor river, Iran. (e-ijep.co.in)
  • 2011. Proximal input of polynuclear aromatic hydrocarbons (PAHs) in groundwater sources of Okrika mainland, Nigeria. (e-ijep.co.in)
  • Nanjing has areas with different degrees of pollution and is therefore predestined for the analysis of particle phase polycyclic aromatic hydrocarbons (P-PAHs) in different functional areas and their correlation with the latter. (aaqr.org)
  • Highly oxygenated organic molecules with high unsaturation (HU-HOMs) are formed by the multigenerational photo-oxidation of large polycyclic aromatic hydrocarbons (PAHs) on soot. (mpic.de)
  • persistent organic pollutants (POPs) including selected polycyclic aromatic hydrocarbons (PAHs), dioxins and furans, polychlorinated biphenyls (PCBs) and hexachlorobenzene (HCB). (europa.eu)
  • Availability of PCBs (Polychlorinated Biphenyls) and PAHs (Polycyclic Aromatic Hydrocarbons) to 'Mytiluj edulis' from Artificially Resuspended Sediments. (epa.gov)
  • RM 6.5W contained higher concentrations of polycyclic aromatic hydrocarbons (PAHs), but diagnostic ratios of both extracts indicated similar PAH sourcing and composition. (pnnl.gov)
  • Polycyclic aromatic hydrocarbons (PAHs) are pyrolysis by-products and major environmental pollutants. (ac.ir)
  • The results demonstrated that the PAHs are present in significant concentrations in char product (54-1184 mg kg -1 ). (ac.ir)
  • A new method of the determination polycyclic aromatic hydrocarbons (PAHs) in water samples was developed by continuous-flow microextraction (CFME) coupled with gas chromatography-mass spectrometry (GC-MS). In this experiment, 15 mL sample solution with no salt-added was flowed at the rate of 1.0 mL min(-1) through 3 microL benzene as extraction solvent. (who.int)
  • Furthermore, the accuracy and repeatability of the method were good by calculating from water samples spiked at known concentrations of PAHs, and the recovery of optimal method was satisfactory. (who.int)
  • Particulate matter (PM) concentrations are significantly higher in urban railway tunnels (178.1 μg/m3) than in metropolitan areas (49 μg/m3). (annexpublishers.com)
  • The rapid increase in the number of vehicles in some Chinese megacities and economically developed regions, such as Beijing, Shanghai, Guangzhou, Pearl River delta, and Yangtze delta, has led to a sharp increase in concentrations of nitrogen oxides (NO x ), volatile organic compounds (VOCs), particulate matter (PM), and ozone (Tang et al. (nationalacademies.org)
  • The city, which has undergone rapid development since the 1980s, has high concentrations of particulate matter and poor visibility in spite of the adoption of numerous measures to control particle pollution. (nationalacademies.org)
  • Gas chromatography mass spectrometry has shown that experimental water sample from various spots of waterbody contains a good number of identical aromatic compounds. (e-ijep.co.in)
  • 2018. Effect of Fenton's reagent on degradation of anthracene, fluorene, naphthalene and phenanthrene mixture in soil. (e-ijep.co.in)
  • 2018. Prevalence and sources of polychlorinated biphenyls in the atmospheric environment of Lake Victoria, East Africa. (slm.go.ug)
  • A Review of Researches on Atmospheric VOCs Monitoring Technique and Pollution Characteristics in China[J]. Journal of Ecology and Rural Environment, 2018, 34(2): 114-123. (ere.ac.cn)
  • Accumulation of aromatic hydrocarbons and their derivatives in large water bodies generally occurs through processes, such as atmospheric deposition, surface runoff, etc. (e-ijep.co.in)
  • Pollutants are introduced into mountain lakes via the atmospheric deposition and run-off from the watershed, but also local sources, like tourism and pastoralism. (springeropen.com)
  • 2023. The atmospheric fate of 1,2-Dibromo-1 4-(1,2-dibromoethyl)cyclohexane (TBECH): Spatial patterns, seasonal variability, and deposition to Canadian coastal regions . (sfu.ca)
  • A polycyclic aromatic hydrocarbon (PAH) is a class of organic compounds that is composed of multiple aromatic rings. (wikipedia.org)
  • The simplest representative is naphthalene, having two aromatic rings, and the three-ring compounds anthracene and phenanthrene. (wikipedia.org)
  • One of the anthropogenic sources might be drainage waters, especially in a city where city dwellers use various aromatic compounds in different forms for their comfort. (e-ijep.co.in)
  • This study proves the utility of liquid-liquid extraction through longtime mechanical agitation in order to extract aromatic compounds from water of a city drainage basin. (e-ijep.co.in)
  • SHAO Min,DONG Dong.Pollution and Control of Atmospheric Volatile Organic Compounds in China[J].Environmental Protection,2013,41(5):25-28. (ere.ac.cn)
  • 4] KLIMONT Z,STREETS D G,GUPTA S, et al .Anthropogenic Emissions of Non-Methane Volatile Organic Compounds in China[J].Atmospheric Environment,2002,36(8):1309-1322. (ere.ac.cn)
  • The terms polyaromatic hydrocarbon, or polynuclear aromatic hydrocarbon (abbreviated as PNA) are also used for this concept. (wikipedia.org)
  • A polyaromatic hydrocarbon may have rings of various sizes, including some that are not aromatic. (wikipedia.org)
  • Thus, we use the concentration of coronene (a six-ring polyaromatic hydrocarbon [PAH] formed by high-temperature combustion) in conjunction with mercury to identify P-Tr volcanic events. (geoscienceworld.org)
  • The increase of concentrations in the cold period is largely due to greater anthropogenic emissions from vehicular traffic and biomass burning, the latter being an important source in the study area. (i-amica.it)
  • 6] LI J L,ZHANG M G,WU F K, et al .Assessment of the Impacts of Aromatic VOC Emissions and Yields of SOA on SOA Concentrations With the Air Quality Model RAMS-CMAQ[J].Atmospheric Environment,2017,158:105-115. (ere.ac.cn)
  • Journal of Soils and Sediments, 15(5): p. 1265-1274. (vims.edu)
  • Mercury concentration enrichments have been widely used as a proxy for volcanic inputs to sediments, especially for ancient LIP eruptions. (geoscienceworld.org)
  • This is a review retrospecting and summarizing researches on source and sink, monitoring technology and pollution characteristics of atmospheric VOCs, in China. (ere.ac.cn)
  • We show that particle-phase photochemical oxidation of polycyclic aromatic hydrocarbons on soot can produce a substantial amount of highly oxygenated OA, which changes soot from being hydrophobic to being hydrophilic and increases the ability of soot particles to serve as cloud condensation nuclei. (mpic.de)
  • Our finding challenges the current understanding of the formation mechanism of atmospheric secondary organic aerosol and demonstrates a strong impact of particle-phase chemistry on the fate and climate effect of soot and combustion-related organic aerosols (e.g., from wildfires and fossil fuel combustions). (mpic.de)
  • Fine particles can penetrate the human respiratory tract and lungs, and several epidemiological studies have reported a link between elevated particle concentration and increased mortality and morbidity (e.g. (nationalacademies.org)
  • Here we use paired coronene (a six-ring polycyclic aromatic hydrocarbon, a high-temperature combustion proxy) and mercury spikes as a refined proxy for LIP emplacement. (geoscienceworld.org)
  • Each short-term episode is likely caused by high-temperature combustion of sedimentary hydrocarbons during initial sill emplacement of the Siberian Traps LIP. (geoscienceworld.org)
  • C. Manzano , Hoh, E. , and Simonich, S. L. Massey , " Quantification of complex polycyclic aromatic hydrocarbon mixtures in standard reference materials using comprehensive two-dimensional gas chromatography with time-of-flight mass spectrometry " , Journal of Chromatography A , vol. 1307, pp. 172 - 179, 2013. (oregonstate.edu)
  • Devi, P & Saroha, AK 2015, Effect of pyrolysis temperature on polycyclic aromatic hydrocarbons toxicity and sorption behaviour of biochars prepared by pyrolysis of paper mill effluent treatment plant sludge. (ac.ir)
  • The combination of coal smog and traffic exhaust results in serious pollution characterized by high levels of photochemical smog, high concentration of fine particles, and poor visibility. (nationalacademies.org)
  • 2016. Critical soil organic carbon range for optimal crop response to mineral fertilizer nitrogen on a Ferralsol. (slm.go.ug)
  • 2015. Precision of farmer-based fertility ratings and soil organic carbon for crop production on a Ferralsol. (slm.go.ug)
  • The impact of biomass burning on the concentrations of atmospheric aerosol is lesser in the summer but not negligible and is therefore one of the most relevant sources at the measurement site. (i-amica.it)
  • The particles emitted by biomass burning therefore have a potential relevant impact on health as they can more easily penetrate the respiratory system than the coarse particles that represent an important part of the contribution of natural sources such as marine aerosol, the crustal matter and carbonates from the soil. (i-amica.it)
  • Biomonitoring is used to study the performance of a single air sampler as representing air elemental concentrations in Lisbon. (environmental-expert.com)
  • By definition, polycyclic aromatic hydrocarbons have multiple rings, precluding benzene from being considered a PAH. (wikipedia.org)
  • According to Clar's rule, the resonance structure of a PAH that has the largest number of disjoint aromatic pi sextets-i.e. benzene-like moieties-is the most important for the characterization of the properties of that PAH. (wikipedia.org)
  • Benzene-substructure resonance analysis for Clar's rule Phenanthrene Anthracene Chrysene For example, phenanthrene has two Clar structures: one with just one aromatic sextet (the middle ring), and the other with two (the first and third rings). (wikipedia.org)
  • 3] KALOGRIDIS C,GROS V,SARDA-ESTEVE R, et al .Concentrations and Fluxes of Isoprene and Oxygenated VOCs at a French Mediterranean Oak Forest[J].Atmospheric Chemistry and Physics,2014,14:10085-10102. (ere.ac.cn)
  • 2017. Conservation farming and changing climate: more beneficial than conventional methods for degraded Ugandan soils. (slm.go.ug)
  • 2017. Higher cereal and legume yields using Ca-bentonite on sandy soils in the dry eastern Uganda: Increased productivity vs. profitability. (slm.go.ug)
  • Concentrations of PM 2.5 , particles with aerodynamic diameters of less than 2.5 µg/m 3 , are also much higher than the recommended standard for annual average ground-level PM 2.5 in the United States (15 µg/m 3 ). (nationalacademies.org)
  • Apart from being petroleum and coal origin, there are lots of modern amenities used by city residents of which these aromatic substances are either constituents or derivatives. (e-ijep.co.in)
  • From the aspects of species of VOCs detected, their concentration release levels and sources of releases, atmospheric VOCs pollution levels of various regions were evaluated, providing certain scientific basis for protection and pollution prevention of the atmospheric environment. (ere.ac.cn)
  • Measured annual mean mass concentrations of fine particles (PM 10 ) exceed the Grade II (100 µg/m 3 ) National Ambient Air Quality Standard (NAAQS) (Song et al. (nationalacademies.org)
  • Nitrogen oxide (NOx) concentrations, which are a direct cause of lung disease, have been found to exceed the atmospheric standard of the Ministry of Environment in tunnels in Korea. (annexpublishers.com)
  • 2023. Methods for Assessing the Bioaccumulation of Hydrocarbons and Related Substances in Terrestrial Organisms: A Critical Review . (sfu.ca)
  • Results showed higher PM 2.5 and PM 10 concentrations in the cold period (autumn and winter) compared to the warm period (spring and summer), with a seasonal variability of the chemical composition that allowed evaluating the variability of the contribution of the different sources using advanced statistical methods (Figure 1.2). (i-amica.it)
  • Characterization of the Spatiotemporal Variability of Non-Urban Ozone Concentrations over the Eastern United States. (epa.gov)
  • In addition, aerosols influence both atmospheric visibility and climate through the scattering and absorption of solar radiation (Schwartz, 1996). (nationalacademies.org)
  • A database of chemical elements' concentrations was obtained by analysing exposed lichens and bark, hung on courtyard trees of 22 Lisbon basic schools from January to May 2008 and June to October 2008 (winter and summer campaigns). (environmental-expert.com)
  • Depending on their chemical composition, their effects may include: acidification of lakes and streams, change in the nutrient balance in coastal waters and large river basins, depletion of nutrients in soil, damage to sensitive forests and farm crops or effects on diversity of ecosystems [ 7 ]. (springer.com)
  • 2015. Legacy and currently used pesticides in the atmospheric environment of Lake Victoria, East Africa. (slm.go.ug)
  • In particular, members belonging to the Ascomycota phylum were the most diverse at higher PAH concentrations suggesting this phylum may be promising biostimulation targets. (duke.edu)
  • The EU guidelines suggest the use of calculations based on trace element concentrations for the classification of hazardous property (HP) 14 - ecotoxic. (kirj.ee)
  • The findings of the study showed that, similarly to coal, oil shale ash (OSA) should not be considered as ecotoxic due to the low concentrations of trace elements. (kirj.ee)
  • Analysis of polycyclic aromatic hydrocarbons in road runoff water from high traffic area of Guwahati city, Assam, India. (e-ijep.co.in)
  • and Palacios, D. M. , " Atmospheric events disrupting coastal upwelling in the southwestern Caribbean " , Journal of Geophysical Research , vol. 115, no. (oregonstate.edu)