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Organic matter and pyritization relationship in recent sediments from a tropical and eutrophic bay.
Mar Pollut Bull. 2014 Dec 15; 89(1-2):220-228.MP

Abstract

The degree of pyritization (DOP) and the extension of metals incorporation into pyrite was investigated at Guanabara Bay sediments. Maximum concentrations of total organic carbon (TOC), total sulfur, biopolymers and viable bacteria cells were observed in silted stations close to discharge points of sewage and minimum concentrations at sandy stations at the entrance of the bay. Pyrite iron concentrations (Fepy) was always lower than the reactive iron and Fepy were below the detection limit at sandy stations. The same trend was found to metals, which its degree of pyritization was Mn=Cu>As=Co>Ni>Cd>Zn≫Pb>Cr. The bay gathers all required factors to sulfate reduction and pyrite formation, once the C:S ratio express the reduced tendency conditions, almost half of the TOC present in its sediments is labile and both reactive sulfur and iron are available. However the degree of trace metals pyritization did not exceed 20%, consistent with the median DOP (29%).

Authors+Show Affiliations

Departamento de Geoquímica, Instituto de Química, Universidade Federal Fluminense, Niterói, RJ 24020-150, Brazil. Electronic address: esabadini@geoq.uff.br.Departamento de Biologia Marinha, Instituto de Biologia, Universidade Federal Fluminense, Niterói, RJ 24020-150, Brazil. Electronic address: senez.thaise@gmail.com.Departamento de Biologia Marinha, Instituto de Biologia, Universidade Federal Fluminense, Niterói, RJ 24020-150, Brazil. Electronic address: tabattass@yahoo.com.br.Departamento de Geoquímica, Instituto de Química, Universidade Federal Fluminense, Niterói, RJ 24020-150, Brazil. Electronic address: manuelmoreira@geoq.uff.br.Laboratório de Palinofácies and Fácies Orgânica (LAFO), Departamento de Geologia, Instituto de Geociências, Universidade Federal do Rio de Janeiro, RJ 21949-900, Brazil. Electronic address: graciano@geologia.ufrj.br.Departamento de Química Analítica, Instituto de Química, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-909, Brazil. Electronic address: santelli@iq.ufrj.br.Departamento de Biologia Marinha, Instituto de Biologia, Universidade Federal Fluminense, Niterói, RJ 24020-150, Brazil. Electronic address: miriancrapez@id.uff.br.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

25444621

Citation

Sabadini-Santos, Elisamara, et al. "Organic Matter and Pyritization Relationship in Recent Sediments From a Tropical and Eutrophic Bay." Marine Pollution Bulletin, vol. 89, no. 1-2, 2014, pp. 220-228.
Sabadini-Santos E, Senez TM, Silva TS, et al. Organic matter and pyritization relationship in recent sediments from a tropical and eutrophic bay. Mar Pollut Bull. 2014;89(1-2):220-228.
Sabadini-Santos, E., Senez, T. M., Silva, T. S., Moreira, M. R., Mendonça-Filho, J. G., Santelli, R. E., & Crapez, M. A. C. (2014). Organic matter and pyritization relationship in recent sediments from a tropical and eutrophic bay. Marine Pollution Bulletin, 89(1-2), 220-228. https://doi.org/10.1016/j.marpolbul.2014.09.055
Sabadini-Santos E, et al. Organic Matter and Pyritization Relationship in Recent Sediments From a Tropical and Eutrophic Bay. Mar Pollut Bull. 2014 Dec 15;89(1-2):220-228. PubMed PMID: 25444621.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Organic matter and pyritization relationship in recent sediments from a tropical and eutrophic bay. AU - Sabadini-Santos,Elisamara, AU - Senez,Thaise M, AU - Silva,Tabatta S, AU - Moreira,Manuel R, AU - Mendonça-Filho,João Graciano, AU - Santelli,Ricardo E, AU - Crapez,Mirian A C, Y1 - 2014/10/17/ PY - 2014/07/30/received PY - 2014/09/22/revised PY - 2014/09/29/accepted PY - 2014/12/3/entrez PY - 2014/12/3/pubmed PY - 2015/7/30/medline KW - Bacteria KW - Biopolymers KW - DOP KW - DTMP KW - Diagenesis KW - Guanabara Bay SP - 220 EP - 228 JF - Marine pollution bulletin JO - Mar Pollut Bull VL - 89 IS - 1-2 N2 - The degree of pyritization (DOP) and the extension of metals incorporation into pyrite was investigated at Guanabara Bay sediments. Maximum concentrations of total organic carbon (TOC), total sulfur, biopolymers and viable bacteria cells were observed in silted stations close to discharge points of sewage and minimum concentrations at sandy stations at the entrance of the bay. Pyrite iron concentrations (Fepy) was always lower than the reactive iron and Fepy were below the detection limit at sandy stations. The same trend was found to metals, which its degree of pyritization was Mn=Cu>As=Co>Ni>Cd>Zn≫Pb>Cr. The bay gathers all required factors to sulfate reduction and pyrite formation, once the C:S ratio express the reduced tendency conditions, almost half of the TOC present in its sediments is labile and both reactive sulfur and iron are available. However the degree of trace metals pyritization did not exceed 20%, consistent with the median DOP (29%). SN - 1879-3363 UR - https://www.unboundmedicine.com/medline/citation/25444621/Organic_matter_and_pyritization_relationship_in_recent_sediments_from_a_tropical_and_eutrophic_bay_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0025-326X(14)00664-X DB - PRIME DP - Unbound Medicine ER -