Influence of sediment parameters on the distribution and fate of PAHs in an estuarine tropical region located in the Brazilian semi-arid (Jaguaribe River, Ceará coast)

Andrade, Márcia V.F. de; Santos, Felipe Rodrigues dos; Oliveira, André Henrique Barbosa de; Nascimento, Ronaldo Ferreira do; Cavalcante, Rivelino M.

doi:10.1016/j.marpolbul.2019.07.027

Cited by 33 publications

(5 citation statements)

References 64 publications

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“…At the same time, a long-distance tanker channel operates within the Don River Delta. In general, PAHs content in the soils of the Don River Delta was higher than in the soils of the river's coastal areas and the Taganrog Bay, which is consistent with the studies of Andrade et al [60]. The soils of the deltas are characterized by an increased ability to accumulate toxic organic compounds and a reduced ability to degrade them (mainly due to constant changes in the redox conditions in the soil profile) [11].…”

Section: Pahs Spatial Distributionsupporting

confidence: 90%

Background Content of Polycyclic Aromatic Hydrocarbons during Monitoring of Natural and Anthropogenically Transformed Landscapes in the Coastal Area Soils

Dudnikova

Minkina

Sushkova

et al. 2023

Water

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The large-scale studies of the Lower Don and the Taganrog Bay coastal zone were carried out to determine the background concentrations of polycyclic aromatic hydrocarbons (PAHs) in soils. The content of 15 priority PAHs was determined by saponification method with HPLC detection and varied widely from 77 µg kg−1 to 16,017 µg kg−1 with mean and median values of 1040 µg kg−1 and 406 µg kg−1, respectively. PAHs’ highest concentration level was observed in the soils of the Don River delta and industrial areas of Taganrog city affected by pyrogenic contamination sources. Background monitoring sites were mostly represented with hydromorphic (Fluvisols Salic and Tidalic Fluvisols) and automorphic (Rendzic Leptosols, Mollic Leptosols) soil types in the study area. The PAHs content in the soils of the background plots did not exceed 600 µg kg−1, with a share of low-molecular-weight PAHs: about 50%. Benzo(a)pyrene content did not exceed the maximum permissible concentration (20 µg kg−1), and low-molecular-weight compounds did not exceed the threshold level for the impact of polyarenes. In automorphic soils, naphthalene and phenanthrene (35–54%) dominated in the composition of the low-molecular-weight PAHs compounds, and only phenanthrene (59–70%) dominated in hydromorphic soils.

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Section: Pahs Spatial Distributionsupporting

confidence: 90%

Background Content of Polycyclic Aromatic Hydrocarbons during Monitoring of Natural and Anthropogenically Transformed Landscapes in the Coastal Area Soils

Dudnikova

Minkina

Sushkova

et al. 2023

Water

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“…Estuarine zones are known for their property of accumulating contaminants discharged over the river course, being a transitional storage area for these compounds. It is worth mentioning that the estuarine region of the Jaguaribe mangrove, located nearby the sampling areas, was classified as moderate to highly contaminated with polycyclic aromatic hydrocarbons (PAHs), presenting levels as high as 3172.3 ng/g [37], besides high contamination with the pesticides DDT, α-endosulfan and heptachlor [38]. The presence of these contaminants contributes to the selection of lipolytic enzyme producers.…”

Section: Discussionmentioning

confidence: 99%

A novel bacterial carboxylesterase identified in a metagenome derived-clone from Brazilian mangrove sediments

et al. 2020

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A functional screening of 1152 clones from a plasmid library constructed with DNA extracted from Brazilian mangrove sediments revealed 3 positive clones for ester-hydrolyzing enzymes, or about one lipolytic gene per 1.2 Mb DNA, which corroborates the idea that oil-contaminated mangroves are a good source of novel microbial lipases/esterases. The partial sequence of the clone LipG7 (1179 bp) showed 30.2% of predicted structure identity with a known esterase, confirming LipG7 as a new member of family VIII esterases. LigG7 shared 80% sequence identity with 1,4-butanediol diacrylate esterase from the Gammaprotebacteria Porticoccus hydrocarbonoclasticus, suggesting it belongs to the Porticoccaceae family. LipG7 was heterologously expressed in Escherichia coli Rosetta-Gami DE3; the purified recombinant enzyme exhibited a predicted molecular weight of 45.2 kDa and exceptional activity towards 4-nitrophenyl butyrate, compared with other recombinant esterases, highlighting its enormous potential for biological applications.

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“…A fração F1 foi analisada pelo Método EPA 8015 (2000), através da cromatografia em fase gasosa com detector de ionização por chama (CG-DIC), com identificação por meio da comparação do tempo de retenção dos analitos com a mistura padrão de n-alcanos de n-C 12 a n-C 40 injetada anteriormente. Por sua vez, na F2 foram adicionados 50 µL das soluções de padrões internos de HPAs (naftaleno-d8, acenafteno-d10, fenantreno-d10, criseno-d12 e perileno-d12), e analisada em um cromatógrafo a gás acoplado a um espectrômetro de massas (CG-EM, modelo Shimadzu AP1010), identificand os analitos a partir da comparação dos tempos de retenção e espectros de massa com os padrões analíticos (ANDRADE et al, 2019;DE MORAIS et al, 2018).…”

Section: Grupounclassified

“…Assim, foi possível observar que os índices encontrados para a razão de Ant/ (Ant+Phe) sugeriram que todas as amostras em estudo têm aporte de fonte de contaminação pirolítica, dado que todos os valores foram maiores que 0,1 (ANDRADE et al, 2019;BAUMARD et al, 1998;BENLAHCEN et al, 1997).…”

Section: Hidrocarbonetos Policíclicos Aromáticos (Hpas)unclassified

“…Com isso, baseando-se nos dados obtidos por meio das razões diagnósticas estudadas, foi considerado que as atividades realizadas ao longo do Rio Parnaíba foram responsáveis pela fonte mista de contaminantes, com predomínio de HPAs provenientes da combustão (ANDRADE et al, 2019;NEIRA et al, 2017;SANTOS et al, 2019;VENTURINI et al, 2015;YUNKER et al, 2002). 1984), sendo os lipídios os principais compostos químicos fontes de fósseis moleculares.…”

Section: Hidrocarbonetos Policíclicos Aromáticos (Hpas)unclassified

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Estudo in Silico De Estruturas Asfaltênicas Utilizando Dinâmica Molecular E Teoria Do Funcional Da Densidade

Araujo¹,

Souza²,

Lima³

2022

Fósseis Moleculares E Aplicações Em Geoquímica Orgânica

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Direitos para esta edição cedidos à Atena Editora pelos autores. Open access publication by Atena Editora Todo o conteúdo deste livro está licenciado sob uma Licença de Atribuição Creative Commons. Atribuição-Não-Comercial-NãoDerivativos 4.0 Internacional (CC BY-NC-ND 4.0). O conteúdo dos artigos e seus dados em sua forma, correção e confiabilidade são de responsabilidade exclusiva dos autores, inclusive não representam necessariamente a posição oficial da Atena Editora. Permitido o download da obra e o compartilhamento desde que sejam atribuídos créditos aos autores, mas sem a possibilidade de alterá-la de nenhuma forma ou utilizá-la para fins comerciais.Todos os manuscritos foram previamente submetidos à avaliação cega pelos pares, membros do Conselho Editorial desta Editora, tendo sido aprovados para a publicação com base em critérios de neutralidade e imparcialidade acadêmica.A Atena Editora é comprometida em garantir a integridade editorial em todas as etapas do processo de publicação, evitando plágio, dados ou resultados fraudulentos e impedindo que interesses financeiros comprometam os padrões éticos da publicação. Situações suspeitas de má conduta científica serão investigadas sob o mais alto padrão de rigor acadêmico e ético.

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Influence of sediment parameters on the distribution and fate of PAHs in an estuarine tropical region located in the Brazilian semi-arid (Jaguaribe River, Ceará coast)

Cited by 33 publications

References 64 publications

Background Content of Polycyclic Aromatic Hydrocarbons during Monitoring of Natural and Anthropogenically Transformed Landscapes in the Coastal Area Soils

Background Content of Polycyclic Aromatic Hydrocarbons during Monitoring of Natural and Anthropogenically Transformed Landscapes in the Coastal Area Soils

A novel bacterial carboxylesterase identified in a metagenome derived-clone from Brazilian mangrove sediments

Estudo in Silico De Estruturas Asfaltênicas Utilizando Dinâmica Molecular E Teoria Do Funcional Da Densidade

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