dc.contributor | Melo Júnior, Germano | |
dc.contributor | | |
dc.contributor | http://lattes.cnpq.br/2539994624152874 | |
dc.contributor | | |
dc.contributor | http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4781194Y6 | |
dc.contributor | Dantas, Tereza Neuma de Castro | |
dc.contributor | | |
dc.contributor | http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4783139Z0&dataRevisao=null | |
dc.contributor | Mendes, Franklin Silva | |
dc.contributor | | |
dc.contributor | http://lattes.cnpq.br/0948550631285518 | |
dc.creator | Queiroz, Maria Sara Maia de | |
dc.date.accessioned | 2011-11-17 | |
dc.date.accessioned | 2014-12-17T14:08:43Z | |
dc.date.accessioned | 2022-10-06T12:18:07Z | |
dc.date.available | 2011-11-17 | |
dc.date.available | 2014-12-17T14:08:43Z | |
dc.date.available | 2022-10-06T12:18:07Z | |
dc.date.created | 2011-11-17 | |
dc.date.created | 2014-12-17T14:08:43Z | |
dc.date.issued | 2011-02-07 | |
dc.identifier | QUEIROZ, Maria Sara Maia de. Hidrocarbonetos policíclicos aromáticos em sedimentos de fundo do estuário do rio Potengi, região da grande Natal (RN): implicações ambientais. 2011. 114 f. Dissertação (Mestrado em Pesquisa e Desenvolvimento em Ciência e Engenharia de Petróleo) - Universidade Federal do Rio Grande do Norte, Natal, 2011. | |
dc.identifier | https://repositorio.ufrn.br/jspui/handle/123456789/12937 | |
dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/3949628 | |
dc.description.abstract | Estuaries are environments prone to the input of chemical pollutants of various kinds
and origins, including polycyclic aromatic hydrocarbons (PAHs). Anthropogenic PAHs
may have two possible sources: pyrolytic (with four or more aromatic rings and low
degree of alkylation) and petrogenic (with two and three aromatic rings and high degree
of alkylation). This study aimed to evaluate the levels, distribution and possible sources
of polycyclic aromatic hydrocarbons in the estuary of the Potengi river, Natal, Brazil.
Samples of bottom sediments were collected in the final 12 km of the estuary until its
mouth to the sea, where the urbanization of the Great Natal is more concentrated.
Sampling was performed on 12 cross sections, with three stations each, totaling 36
samples, identified as T1 to T36. The non alkylated and alkylated PAHs were analyzed
by gas chromatography coupled to mass spectrometry (GC / MS). PAHs were detected
in all 36 stations with total concentration on each varying 174-109407 ng g-1. These
values are comparable to those of several estuarine regions worldwide with high
anthropogenic influence, suggesting the record of diffuse contamination installed in the
estuary. PAHs profiles were similar for most stations. In 32 of the 36 stations, low
molecular weight PAHs (with 2 and 3 ring: naphthalene, phenanthrene and their
alkylated homologues) prevailed, which ranged from 54% to 100% of the total PAH,
indicating that leaks, spills and combustion fuels are the dominant source of PAH
pollution in the estuary. The level of contamination by PAHs in most stations suggests
that there is potential risk of occasional adverse biological effects, but in some stations
adverse impacts on the biota may occur frequently. The diagnostic ratios could
differentiate sources of PAHs in sediments of the estuary, which were divided into three
groups: petrogenic, pyrolytic and mixing of sources. The urban concentration of the
Great Natal and the various industrial activities associated with it can be blamed as
potential sources of PAHs in bottom sediments of the estuary studied. The data
presented highlight the need to control the causes of existing pollution in the estuary | |
dc.publisher | Universidade Federal do Rio Grande do Norte | |
dc.publisher | BR | |
dc.publisher | UFRN | |
dc.publisher | Programa de Pós-Graduação em Ciência e Engenharia do Petróleo | |
dc.publisher | Pesquisa e Desenvolvimento em Ciência e Engenharia de Petróleo | |
dc.rights | Acesso Aberto | |
dc.subject | Hidrocarbonetos policíclicos aromáticos | |
dc.subject | Sedimentos de fundo | |
dc.subject | Fontes | |
dc.subject | Razões diagnósticas | |
dc.subject | Petrogênico | |
dc.subject | Pirolítico | |
dc.subject | Estuário do Rio Potengi | |
dc.subject | Polycyclic aromatic hydrocarbons | |
dc.subject | Bottom sediment | |
dc.subject | Sources | |
dc.subject | Diagnostic ratios | |
dc.subject | Petrogenic | |
dc.subject | Pyrolytic | |
dc.subject | Potengi River Estuary | |
dc.title | Hidrocarbonetos policíclicos aromáticos em sedimentos de fundo do estuário do rio Potengi, região da grande Natal (RN): implicações ambientais | |
dc.type | masterThesis | |