dc.contributor | Chiavone Filho, Osvaldo | |
dc.contributor | | |
dc.contributor | | |
dc.contributor | http://lattes.cnpq.br/2621516646153655 | |
dc.contributor | Silva, Douglas do Nascimento | |
dc.contributor | | |
dc.contributor | http://lattes.cnpq.br/0841120842454720 | |
dc.contributor | Jerônimo, Carlos Enrique de Medeiros | |
dc.contributor | | |
dc.contributor | http://lattes.cnpq.br/9996525070555805 | |
dc.creator | Fernandes, Hermano Gomes | |
dc.date.accessioned | 2016-01-05T22:10:46Z | |
dc.date.accessioned | 2022-10-06T12:59:07Z | |
dc.date.available | 2016-01-05T22:10:46Z | |
dc.date.available | 2022-10-06T12:59:07Z | |
dc.date.created | 2016-01-05T22:10:46Z | |
dc.date.issued | 2014-05-10 | |
dc.identifier | FERNANDES, Hermano Gomes. Aplicação do Na2S2O8, H2O2 e ferro na remediação de solos (latossolo e areia destrófica) contaminados com diesel. 2014. 108f. Dissertação (Mestrado em Engenharia Química) - Centro de Tecnologia, Universidade Federal do Rio Grande do Norte, Natal, 2014. | |
dc.identifier | https://repositorio.ufrn.br/jspui/handle/123456789/19536 | |
dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/3962158 | |
dc.description.abstract | Environmental liabilities from accidents in the retail petroleum industry,
especially in urban areas, have represented a serious problem whose impact reaches the
underground, people's health and even economic losses with the remediation process.
In U.S.A. are estimated hundreds of billions of dollars invested in soil remediation
processes. The results of the reports and investigative reports of liabilities in fuel
stations distributed in the urban area of Natal-RN were used to estimate the local
scenario of contamination. This database has been possible to determine the main
contaminants (BTEX, PAHs, TOC), affected neighborhoods and types of potentially
more impacted soils. Experiments were carried out in order to reverse contamination of
this scenario, where the soil type was a factor in the planning, because it influences
directly on the effectiveness of remediation techniques studied: Oxidation by hydrogen
peroxide and oxidation by sodium persulphate. These oxidants are activated forming
free radicals (HO•-, SO4
•-, HO2
•
, O2
•-, S2O8
-2, etc) responsible for to mineralize the
hydrocarbons and other organic compounds (releasing O2 e CO2). In the activation
process, the ferrous ions (II) and ferric (III) were studied as well as hydrogen peroxide
activation technique with sodium persulfate, the latter being presented the best
efficiency among all the study, when activated with Fe+3. In addition to defining the
most efficient technique, the aim of this study was to evaluate the influence of different
soils among oxidative techniques, characterizing the effect of the concentration of these
oxidants and also the concentration of the catalysts. Exists in most scenarios evaluated
the presence of intrinsic total iron soil matrix. The so-called latosols present
microaggregates reddish indicating the presence of these reactive species like iron and
clayey aspect. The kinetic study was conducted by experimental design and monitoring
of the percentage of total carbon (SSM-5000A) in the solid and liquid phases, knowing
that 82.4% of the diesel molecule is carbon. Yet organic carbon and pH of liquid
samples were analyzed for technical, characterizing the influence of soil type and its
operating condition. The Fenton-like technique H2O2 e Fe+2 presented satisfactory
oxidation, including sandy soil, but well below the best result. The sodium persulphate
only activated with temperature, even in the most favorable soil, did not provide good
efficiency. The best technique in the study had the concentration profile with 2,2x10-
1mol.L-1 of Na2S2O8 activated with 6,53x10-1mol.L-1 of H2O2 and 2,5x10-2 Fe3+mol.L-1
which reduced in less than a day 96 contamination in red soil, initially with 66,667 mg
of diesel per kg of clean soil | |
dc.language | por | |
dc.publisher | Universidade Federal do Rio Grande do Norte | |
dc.publisher | Brasil | |
dc.publisher | UFRN | |
dc.publisher | PÓS-GRADUAÇÃO EM ENGENHARIA QUÍMICA | |
dc.rights | Acesso Aberto | |
dc.subject | Solos contaminados | |
dc.subject | Persulfato | |
dc.subject | Fenton | |
dc.subject | Processos oxidativos avançados | |
dc.subject | ISCO | |
dc.title | Aplicação do Na2S2O8, H2O2 e ferro na remediação de solos (latossolo e areia destrófica) contaminados com diesel | |
dc.type | masterThesis | |