Metallic Pollution
Mostrando 1-12 de 12 artigos, teses e dissertações.
-
1. Espuma ultraliviana de Mg a partir de viruta reciclada
ABSTRACT Hundreds of people worldwide die or are severely maimed in collisions during traffic accidents, due to the energy transmitted to the passengers on impact. A dissipation of said energy is necessary to minimize it's effects, which can be achieved through absorbers. In recent years, metallic foams have started to be considered as energy absorbers. Meta
Matéria (Rio J.). Publicado em: 19/07/2018
-
2. Fitoextração em solo contaminado com metais pesados / Phytoextraction of soil contaminated with heavy metals
The industrial and urban progress associated with increased production of consumer goods has resulted in the generation of waste, which, for a long time, was indiscriminately discarded in the environment, causing damage usually irreversible to recover. Two experiments were conducted in soils contaminated with heavy metals: the first aimed at the disposal of
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/07/2011
-
3. Characterization and exploitation of piston ring chips in the rectification process a new recycling proposal
The rough grind machine operation in metallic material produce a sub product with the followings components such as: metallic residue, small parts come from the resin grinds, diatomaceous earth material (filter material) and soluble oil in water for tools cooling. According [HU1UH] from ABNT, this sub product is toxic, not inert material, aggress the environ
Matéria (Rio de Janeiro). Publicado em: 2010
-
4. SIMULATION OF THE VERTICAL TRANSPORT OF ZINC, LEAD AND COPPER IN CONTAMINATED SOILS / SIMULAÇÃO DO TRANSPORTE VERTICAL DE ZINCO, CHUMBO E COBRE EM SOLOS CONTAMINADOS
The environmental contamination by metallic trace elements is a problem that is getting worse around the world due to the growth and the technologic development of the humanity. Among the main sources of this kind of contamination are the atmospheric deposition of particles in soils located around industrial complexes and the prolonged and concentrated appli
Publicado em: 2009
-
5. Argamassa tÃrmica produzida com resÃduos da explotaÃÃo e processamento mineral de caulim e vermiculita expandid
In the last years, mining industry has been mentioned as pollutant sources of the environment, as in case of the kaolin. The pollution occurs due to the great amount of discarded materials (rejects) in the mineral processing and in the ore extraction. These rejects are frequently deposited in the ecosystem without improvement near by the processing plant How
Publicado em: 2008
-
6. Effect of metallic pollutants in marine algae pigments contents and evaluation of carotenes structural features in mimetic membranes / Efeito de poluentes metálicos nos níveis de pigmentos fotossintéticos presentes em algas marinhas e avaliação do papel estrutural de carotenos em membranas miméticas
This work involves the study of the levels of photosynthetic pigments, carotenoids and chlorophylls, contained in the marine algae Tetraselmis gracilis and Gracilaria tenuistipitata, under conditions of cellular senescence and anthropogenic stress (metallic pollution). Due to the fundamental organizational role of carotenoids in thylakoid membranes, its stru
Publicado em: 2007
-
7. Determinação de ions metalicos em moluscos bivalves do manguezal da região petrolifera de São Francisco do Conde - Reconcavo Baiano / Determination of metallic ions in bivalve molluscs from the petroliferous region of São Francisco do Conde Mangrove - Reconcavo Baiano
The pollution of oceans, bays and estuaries as a result of industrial and domestic effluents that contain metallic ions is one of the most important factors that lead to the contamination of bivalve molluscs. These organisms are greatly affected by the bioaccumulation of inorganic species, even at low concentrations, reflecting the environmental contaminatio
Publicado em: 2006
-
8. "Estudo do processo de complexação de calixarenos com íons metálicos e espécies neutras por simulações de dinâmica molecular" / A study of the complexation process of calixarenes with metallic ions and neutral species from molecular dynamic simulations
We report a series of Molecular Dynamics simulations, in vacuum and in acetonitrile solution, on the complexation process of the calixarens tetraethylester p-tert-butyl calix[4]arene (CLE) and tetramethylketone p-tert-butyl calix[4]arene (CLC) with Pb2+ and Cd2+ anions and neutral species. The solvent and calixarene molecules were modeled based on the OPLS-A
Publicado em: 2006
-
9. BIOSSORPTION OF HEAVY METALS ON GREEN COCONUT POWDER / BIOSSORÇÃO DE METAIS PESADOS UTILIZANDO PÓ DA CASCA DE COCO VERDE (COCOS NUCIFERA)
Heavy metal pollution has become one of the most serious problems today, and the use of organic material biomass for the detoxification of industrial effluents for environmental protection offers a potential alternative to existing trea tment technologies. The aim of this work was determined the biosorption capacity of coconut fibers (Cocos nucifera) for dif
Publicado em: 2005
-
10. Study on energetic application of used lubricant oil / Estudo do reaproveitamento energético de óleos lubrificantes usados
Used lubricanting oil has led to serious environmental problems because its irresponsible disposal causes pollution of rivers, springs and water sources. Besides, when it is burned without control and any care about the emission limits defined by environmental government agencies, it launches toxicant gases and oxides in the atmosphere. In order to reduce su
Publicado em: 2004
-
11. Respiratory cancer and air pollution from iron foundries in a Scottish town: an epidemiological and environmental study.
A geographical association between respiratory cancer and air pollution from steel foundries has been shown previously in Scotland and elsewhere. In the present study the iron-founding town of Kirkintilloch was found to have standardised mortality ratios (SMRs) for respiratory cancer in 1959-63, 1964-8, and 1969-73 that were unexceptional in comparison with
-
12. Mercuric ion reduction and resistance in transgenic Arabidopsis thaliana plants expressing a modified bacterial merA gene.
With global heavy metal contamination increasing, plants that can process heavy metals might provide efficient and ecologically sound approaches to sequestration and removal. Mercuric ion reductase, MerA, converts toxic Hg2+ to the less toxic, relatively inert metallic mercury (Hg0) The bacterial merA sequence is rich in CpG dinucleotides and has a highly sk