An investigation has been carried out to understand the contamination characteristics of roadside dust in the industrial area of Islamabad, Pakistan. The amounts of Si, S, Cl, K, Ca, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu,...An investigation has been carried out to understand the contamination characteristics of roadside dust in the industrial area of Islamabad, Pakistan. The amounts of Si, S, Cl, K, Ca, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Pb,Zn, Ga, As, Se and Cd were determined from 95 roadside dust samples collected along the Islamabad industrial area using Proton Induced X-ray Emission(PIXE). The results indicated that concentrations of all elements,except Cd, in the roadside dust were significant. The results of the enrichment factor show that the elementary composition of the roadside dust could be categorized as soil elements from the crust of the earth and elements from anthropogenic pollution. The high enrichment factors imply that elements such Cr, Cu, Pb, Zn, As, Se,Cd, Ni, Co and S came from anthropogenic activities. The source of metal contamination was identified using multivariate statistical analysis. It has been concluded that Ca, Sc, Ti, V, Mn and Fe mainly originate from crustal sources; Cr, Cu, Ni, Pb, Zn and Ga are associated with point-sources from industrial pollution/traffic;and S, Cl, K, As and Se are mainly related to oil/coal combustion.展开更多
BGP is a company specialising in geophysical prospecting technical services under the China National Petroleum Corporation(hereinafter referred to as CNPC).BGP is an international comprehensive technology service comp...BGP is a company specialising in geophysical prospecting technical services under the China National Petroleum Corporation(hereinafter referred to as CNPC).BGP is an international comprehensive technology service company integrating oil and gas exploration onshore and offshore,data processing and interpretation,information technology services,geophysical prospecting equipment and software development and manufacturing,and it is also the main force of CNPC to explore oil and gas.After years of development,the business scope of BGP has been continually expanding,and its business revenue has ranked first in the global geophysical prospecting industry for four consecutive years.Since going abroad in the 1980s,it has served more than 200 oil companies in 59 countries across 5 continents.It has promoted the employment of more than 90,000 people in more than 20 countries along the route of the"Belt and Road",which has promoted local oil and gas exploration,economic prosperity and social development.展开更多
文摘An investigation has been carried out to understand the contamination characteristics of roadside dust in the industrial area of Islamabad, Pakistan. The amounts of Si, S, Cl, K, Ca, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Pb,Zn, Ga, As, Se and Cd were determined from 95 roadside dust samples collected along the Islamabad industrial area using Proton Induced X-ray Emission(PIXE). The results indicated that concentrations of all elements,except Cd, in the roadside dust were significant. The results of the enrichment factor show that the elementary composition of the roadside dust could be categorized as soil elements from the crust of the earth and elements from anthropogenic pollution. The high enrichment factors imply that elements such Cr, Cu, Pb, Zn, As, Se,Cd, Ni, Co and S came from anthropogenic activities. The source of metal contamination was identified using multivariate statistical analysis. It has been concluded that Ca, Sc, Ti, V, Mn and Fe mainly originate from crustal sources; Cr, Cu, Ni, Pb, Zn and Ga are associated with point-sources from industrial pollution/traffic;and S, Cl, K, As and Se are mainly related to oil/coal combustion.
文摘BGP is a company specialising in geophysical prospecting technical services under the China National Petroleum Corporation(hereinafter referred to as CNPC).BGP is an international comprehensive technology service company integrating oil and gas exploration onshore and offshore,data processing and interpretation,information technology services,geophysical prospecting equipment and software development and manufacturing,and it is also the main force of CNPC to explore oil and gas.After years of development,the business scope of BGP has been continually expanding,and its business revenue has ranked first in the global geophysical prospecting industry for four consecutive years.Since going abroad in the 1980s,it has served more than 200 oil companies in 59 countries across 5 continents.It has promoted the employment of more than 90,000 people in more than 20 countries along the route of the"Belt and Road",which has promoted local oil and gas exploration,economic prosperity and social development.
