Dust samples collected from the Beijing metropolitan area (China) were evaluated to determine the distribution and the concentration of platinum group elements (PGEs). The dust particles that were smaller than 100 mesh size fraction (150 microm) were analyzed after aqua regia digestion. Concentrations of Pt, Rh, and Pd were found to be between 3.96 and 356.3 ng/g, 2.76 and 97.11 ng/g, and 0.1 a...

The main sources of non-exhaust vehicular emissions that contribute to road dust are tire, brake and clutch wear, road surface wear, and other vehicle and road component degradation. This study is an attempt to identify and investigate heavy metals in urban and motorway road dusts as well as in dust from brake linings and tires. Road dust was collected from sections of the A-4 motorway in Polan...

How does isolation affect the economic activity of cities? Transport costs are widely considered an important barrier to local economic activity but their impact in developing countries is not well-studied. This paper investigates the role of intercity transport costs in determining the income of sub-Saharan African cities. In particular, focusing on fifteen countries whose largest city is a po...

SWAT (Soil and Water Assessment Tool) is a watershed model that has been incorporated into USEPA’s modeling framework called BASINS used for total maximum daily load (TMDL) analysis. It is thus important that SWAT realistically simulate tile flow and pothole landscapes that are common in much of the Corn Belt and Great Lakes states. In this study, SWAT was modified to simulate water table dynam...

Not very successfully at all, according to a recent study which suggests that the high density of roads in many areas may be creating isolated populations of these key invertebrates, reducing genetic heterogeneity and increasing the possibility of local extinctions. Irene Keller and Carlo Largiader at the University of Berne, Switzerland, have carried out a study on the large, flightless ground...

1. introduction dust storm is an important atmospheric phenomenon. it has important environment, health, economic and social activities due to penetration of suspended particles of dust to the atmosphere. measurements resulting from earth and satellite stations show the fact that particles of dust in storms, remain in the nature for a long time. they can get far away by wind, hundreds of kilome...

Roads with low traffic volume link rural settlements together and connect them urban centres, mobilising goods agricultural products, facilitating the transportation of people. In Colombia, most these roads are in poor conditions, causing social, economic, environmental problems, significantly affecting mobility, security, economic progress country its inhabitants. Therefore, it is essential to...

Microplastic content was analyzed in road dust, soils alongside roads and stormwater run-offs Al Ain City, Abu Dhabi. Apart from tire wear material, fibers degradation products of meso- macroplastics such as plastic bags bottle tops were found to be the most dominant microparticles. Speed bumps artificial turf/lawns also evaluated potential sources microplastics on roads. It that arid regions A...