| Author (s): |
E. Teixeira, Braga, J. Fachel, D. Migliavacca, J.D. Sanchez, M.L.L.Fomoso
|
| Title: |
CHEMICAL CHARACTERIZATION OF ATMOSPHERIC PARTICLES IN URBAN AREAS OF RIO GRANDE DO SUL, BRAZIL-PRELIMINARY STUDY |
| Abstract: |
This work reports the determination of the concentration and chemical composition of atmospheric particles in the urban districts of Charqueadas and Sapucaiia do Sul, State of Rio Grande do Sul, Brazil. Chemical composition, morphology, and particle size were analyzed using a scanning electron microscope with energy dispersive x=ray microanalysis (SEM-EDS). Cluster analysis showed that there were six types of particles: Fe-Zn, Fe, Si=Al, Si, Ca-S, and Na. Factorial analysis from cluster data showed that particles rich in Fe-Zn, Si-Al, and Ca-S appeared more frequently, indicating anthropogenic influence (vehicles, steel plant, coal-fired power station). The experimental results and consideration of the wind directions show that the main source of pollution in Charqueadas appears to be due to coal mining and steel industries, while in Sapucaia do Sul due to steel plants and vehicles.
|
| Keywords: |
pollution, particles, coal, vehicles.
|
| Year: |
2006
|
| Initial page: |
1
|
| Final page: |
16
|
| Link: |
Acessar |
| DOI: |
10.48141/SBJCHEM.v14.n14.2006.3_2006.pdf |
|
|
| Author (s): |
Joao Marcos Hohemberger; Carlos Perez Bergmann and Lavinel G. Ionescu
|
| Title: |
PRESENCE OF MERCURY IN PETROLEUM |
| Abstract: |
The present article is a review of current knowledge of the presence of mercury in petroleum and natural gas. Effect of mercury on petrochemical processes and its removal are also discussed.
|
| Keywords: |
Mercury, Petroleum, Petrochemical Processing Natural Gas, Mercury Removal.
|
| Year: |
2006
|
| Initial page: |
17
|
| Final page: |
25
|
| Link: |
Acessar |
| DOI: |
10.48141/SBJCHEM.v14.n14.2006.19_2006.pdf |
|
|
| Author (s): |
Joao Marcos Hohemberger, Carlos Perez Bergmann and Lavinel G. Ionescu
|
| Title: |
MERCURY CORROSION OF CRYOGENIC ALUMINUM HEAT EXCHANGERS |
| Abstract: |
The present article is a brief review of the current understanding of mercury-induced Liquid Metal Embrittlement (LME), with particular emphasis on the corrosion and failure of aluminum cryogenic heat exchangers.
|
| Keywords: |
Aluminum Mercury, Corrosion, Cryogenic Heat Exchangers, Liquid Metal Embrittlement (LME).
|
| Year: |
2006
|
| Initial page: |
27
|
| Final page: |
38
|
| Link: |
Acessar |
| DOI: |
10.48141/SBJCHEM.v14.n14.2006.28_2006.pdf |
|
|
| Author (s): |
Lavinel G. Ionescu and Luis Alcides B. De Boni
|
| Title: |
GLIMPSES OF THE HISTORY OF CHEMISTRY IN MEXICO |
| Abstract: |
The present article describes some aspects of the history of chemistry in Mexico. Some developments of interest of the Pre-Hispanic or Pre-Columbian Period are treated briefly. For the Colonial Period, the importance of the Schoo/ of Mines of Mexico City, the discovery of vanadium, and other contributions of Andres Manuel Del Rio are discussed in detail. For more recent times, the work of Xorge Alejandro Dominguez in the area of natural products and the study of the ozone layer by Mario Jose Molina, Nobel Prize in Chemistry, are presented
|
| Keywords: |
history of chemistry, Mexico, colonial period, ozone layer.
|
| Year: |
2006
|
| Initial page: |
39
|
| Final page: |
65
|
| Link: |
Acessar |
| DOI: |
10.48141/SBJCHEM.v14.n14.2006.40_2006.pdf |
|
|
