Polycyclic Soil
Mostrando 13-24 de 60 artigos, teses e dissertações.
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13. Application of vermicomposting for the biorremediation of contaminated soil by polycyclic aromatic hidrocarbons / Aplicação de vermicompostagem para a biorremediação de solos contaminados por hidrocarbonetos policíclicos aromáticos
One of the main environmental problems that we face today is the soil contamination due to storage fuel tanks leakages. Fuels are comprised of a variety of hydrocarbons, among them are the polycyclic aromatic hydrocarbons (PAHs). Those are classified by US-EPA and NIOSH as prioritary contaminants, due to their carcinogenic and mutagenic characteristics and t
Publicado em: 2008
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14. Avaliação do destino e bioacumulação de benzo(a)pireno através de simulação computacional
The objective of this work was to evaluate the environmental distribution of benzo(a)pirene, a polycyclic aromatic hydrocarbon, by the EQC model. The modeling of the contaminant distribution was accomplished by means of the fugacity model applied to a hypothetical scenario constituted by air, water, soil and sediment. The modeling and simulations revealed th
Química Nova. Publicado em: 2008
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15. ESTUDO DA ADSORÇÃO DE PIRENO EM SOLOS BRASILEIROS / PYRENE ADSORPTION IN BRAZILIAN SOILS STUDY
Since most of the studies that involve polycyclic aromatic hydrocarbons (PAH) adsorption in soils are make in regions of temperate or cold climate. In tropical countries, the characteristics of the pedological processes and the resultant soils are quite different there is the necessity of working on new studies in the Brazilian soils. In this dissertation, t
Publicado em: 2008
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16. Degradação de naftaleno, fenantreno e benzo(a)pireno em solos e sedimentos de ambientes costeiros, oceânicos e antárticos / Degradation of naphthalene, phenanthrene e benzo(a)pyrene in soil and sediments of coastal, oceanic and Antarctic environments
Petroleum is the main source of fuel, and the operations of exploration, transportation, refining and distribution are potential sources of environmental pollution. In contaminated environments, the degradation of PAHs (Polycyclic Aromatic Hydrocarbons) depends on climatic factors, soil and microbial population. This study aimed to assess the potential for d
Publicado em: 2008
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17. "Metodologia para Determinação de Hidrocarbonetos Policíclicos Aromáticos em Sedimentos e Solos Periféricos à Represa São Pedro Juiz de Fora, MG"
Polycyclic Aromatic Hydrocarbons are important substances that are produced by many antropogenic sources, among that, the most significant is burns of fossil fuels and biomass which releases these compounds to the environment. Sediments and soils are important matrix to study contamination and their effects because they are able to adsorb organic compounds s
Publicado em: 2008
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18. Substâncias tóxicas persistentes (STP) no Brasil
The present article presents an assessment of PTS in Brazil including polychlorinated biphenyls, polycyclic aromatic hydrocarbons, benzene hexachloride, aldrin, dieldrin, endrin, p,p,-DDT, p,p,DDE, p,p,-DDD, hexachlorocyclohexanes (alpha-HCH, beta-HCH, gamma-HCH and delta-HCH), endossulfan, heptachlor and pentachlorophenol. The data presented here are relate
Química Nova. Publicado em: 2007
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19. Rhizospheric microorganisms and arbuscular mycorrhiza in soil from a petrochemical waste landfarming system. / Microbiota RizosfÃrica e Micorriza Arbuscular em Solo de "Landfarming" de ResÃduos PetroquÃmicos.
In the petroleum industrialization a great volume of different toxic residues is generated. Because of these waste environmental hazards they need to be adequately treated before final disposition in the environment. These wastes are usually treated by landfarming systems, but this technique has only relative success, since it doesn t completely remove all c
Publicado em: 2007
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20. Pseudomonas fluorescens UCP 1514 biotechnological potential in degradation of dibenzotiofenol / Potencial biotecnologico de Pseudomonas fluorescens UCP 1514 no no processo degrativo do dibenzotiofeno
Crude oil and its distillates contain significant amounts of low-molecular-mass organosulphur compounds such as alkyland cycloalkyl thiols, alkyl- and arylthioethers and aromatic heterocycles based on thiophene. This last group of polycyclic aromatic sulfurated hydrocarbons includes thiophene itself, benzothiophene, dibenzothiophene, and their alkylated deri
Publicado em: 2007
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21. Determinação do coeficiente de distribuição (Kd) de benzo(a)pireno em solo por isotermas de sorção
Leaking of diesel oil from gas stations is frequent in Brazil. The presence of polycyclic aromatic hydrocarbons (PAHs), which are highly toxic is an indication of contamination by heavy hydrocarbons from diesel oil. Here were present the determination of the distribution coefficient (Kd) of benzo(a)pyrene (the most carcinogenic of the PAHs) in tropical soils
Química Nova. Publicado em: 2006-07
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22. Distribuição de hidrocarbonetos policíclicos aromáticos em solos na região da serra catarinense o comparação entre metodologias de extração e avaliação do impacto ambiental
The purpose of this work went to compare the efficiency of extraction of PHA in soil, applying the methodologies of the ultrasound, soxhlet and shaking besides to verify the distribution, occurrence and the amounts of polycyclic aromatic hydrocarbons (PHA) in superficial layers of the soil near to an industry of biomass in the city of Lages, mountain region
Publicado em: 2006
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23. Avaliação da viabilidade da utilização do teste respirométrico de Bartha para determinar a biodegradação de hidrocarbonetos aromáticos polinucleares em solo tropical: caso do fenantreno. / Feasibility of application of Barthas respirometric method to determine biodegradation of polycyclic aromatic hydrocarbons in tropical soil: phenantrene case.
Nowadays, one of the most serious environmental problems is the contamination of soil and groundwater. In Europe, 300,000 contaminated or potentially contaminated sites have already been identified and there it is estimated that 1.5 million contaminated sites exist. In the United States of America, more than 63,000 have already been identified. In Brazil, 1,
Publicado em: 2005
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24. RemediaÃÃo de solos contaminados por derivados de petrÃleo utilizando processo foto-fenton
In the manipulation of petroleum derivatives may occur the contamination of soil, because of leaks, spills and other accidents during the exploration, refining, transport and storage. Those accidents have been increasing in the last years due to the growing demand of energy of the country. Many of these pollutants are highly impactants for man and environmen
Publicado em: 2005