The effects of anthropogenic particulate emissions on roadway dust and Nerium oleander leaves in Messina (Sicily, Italy)

2003 ◽  
Vol 5 (5) ◽  
pp. 766-773 ◽  
Author(s):  
Gaetano Dongarrà ◽  
Giuseppe Sabatino ◽  
Maurizio Triscari ◽  
Daniela Varrica
Author(s):  
R. Stevenson

A study has been made of the morphology and crystallography of particulate emissions from indirect injection diesel engines. This particulate matter consists substantially of carbon (although hydrocarbons can be extracted with solvents). Samples were collected in a diluted exhaust stream on amorphous carbon films and examined in a JEM-200C electron microscope operated in the TEM mode with an accelerating voltage of 200 KV.The morphology of the diesel particles, as shown in Fig. 1, markedly resembles carbon blacks and consists of an agglomeration of quasispherical subunits arranged in chains or clusters. Only limited changes in morphology were observed as the number of subunits in the particle increased (although larger particles tended to be more cluster-like than the extended chain shown in Fig. 1). However, a dramatic effect of the number of subunits was observed on the character of the diffraction pattern. Smaller particles yielded a diffraction pattern consisting of very diffuse rings typical of turbostratic carbon; the diffraction patterns from the larger particles, however, although qualitatively similar, exhibited much sharper and less diffuse ring patterns.


2021 ◽  
Author(s):  
Siham Ayouaz ◽  
Sheila Cristina Oliveira-Alves ◽  
Ana Teresa Serra ◽  
Khalef LEFSIH ◽  
Madani Samah ◽  
...  

Nerium oleander L, is a medicinal plant widely used for pharmaceutical purposes. In this work the pink flowers of this plant were characterized in terms of phenolic composition by LC-DAD-ESI-MS/MS...


2021 ◽  
Vol 170 ◽  
pp. 1215-1227
Author(s):  
Yifan Du ◽  
Weigang Lin ◽  
Peter Glarborg

2021 ◽  
pp. 105799
Author(s):  
Sheng Su ◽  
Tao Lv ◽  
Yitu Lai ◽  
Jinsong Mu ◽  
Yunshan Ge ◽  
...  

Chemosphere ◽  
2021 ◽  
pp. 130682
Author(s):  
Ming Li ◽  
Dongming Huang ◽  
Yuanhong Zhou ◽  
Jing Zhang ◽  
Xintao Lin ◽  
...  

2003 ◽  
Vol 37 (37) ◽  
pp. 5247-5259 ◽  
Author(s):  
Urs Lehmann ◽  
Martin Mohr ◽  
Thomas Schweizer ◽  
Josef Rütter

2021 ◽  
pp. 111457
Author(s):  
Kenneth S. Plante ◽  
Varun Dwivedi ◽  
Jessica A. Plante ◽  
Diana Fernandez ◽  
Divya Mirchandani ◽  
...  

Energies ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1538
Author(s):  
Felipe Andrade Torres ◽  
Omid Doustdar ◽  
Jose Martin Herreros ◽  
Runzhao Li ◽  
Robert Poku ◽  
...  

The worldwide consumption of fossil hydrocarbons in the road transport sector in 2020 corresponded to roughly half of the overall consumption. However, biofuels have been discreetly contributing to mitigate gaseous emissions and participating in sustainable development, and thus leading to the extending of the commercial utilization of internal combustion engines. In this scenario, the present work aims at exploring the effects of alternative fuels containing a blend of 15% ethanol and 35% biodiesel with a 50% fossil diesel (E15D50B35) or 50% Fischer–Tropsch (F-T) diesel (E15FTD50B35) on the engine combustion, exhaust emissions (CO, HC, and NOx), particulate emissions characteristics as well as the performance of an aftertreatment system of a common rail diesel engine. It was found that one of the blends (E15FTD50B35) showed more than 30% reduction in PM concentration number, more than 25% reduction in mean particle size, and more than 85% reduction in total PM mass with respect to conventional diesel fuel. Additionally, it was found that the E15FTD50B35 blend reduces gaseous emissions of total hydrocarbons (THC) by more than 25% and NO by 3.8%. The oxidation catalyst was effective in carbonaceous emissions reduction, despite the catalyst light-off being slightly delayed in comparison to diesel fuel blends.


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