Authors: Quintas, Pamela Yanina; Arias, Andres Hugo; Oliva, Ana Laura; Domini, Claudia Elizabeth; Alvarez, Monica Beatriz; Garrido, Mariano Enrique; Marcovecchio, Jorge Eduardo
Publication Date: 2017.
Language: English.
Abstract:
Levels of tributyltin and its breakdown compounds, including the first record of monobutyltin (MBT) in history for Latin America, were determined in native mussels (Brachidontes rodriguezii) by means of CG-MS, after extraction/derivatization assisted by ultrasound. The samples were collected in 2013 in Bahía Blanca Estuary (Argentina) at 6 sites, which reflect different levels of maritime activities. Total butyltins (TBts = TBT+ DBT+ MBT) levels ranged from 19.64 to 180.57 ng Sn g−1 dry weight. According to the Oslo-Paris commission, the results indicated that 73.9% of mussels could be under biological effects risks associated with TBT pollution. In accordance with the calculated bioaccumulation factors, approximately 56% of samples appeared to have accumulated TBT through the sediments. All sampling sites were shown to be impacted by organotin compounds (OTCs) showing variable levels through seasons, which could be related with the variation of the water temperature. Degradation index analyses suggested aged inputs of TBT possibly under a general degradation process at the area of study. In addition, the occurrence of DBT and MBT could not be uniquely attributed to the degradation pathway of the TBT; in fact, results outlined the possible contribution of some punctual and diffuse sources at the area such as proximity to plastic industries, industrial effluents, sewage outlets and domestic wastewaters.
Author affiliation: Quintas, Pamela Yanina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; Argentina
Author affiliation: Arias, Andres Hugo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; Argentina
Author affiliation: Oliva, Ana Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; Argentina
Author affiliation: Domini, Claudia Elizabeth. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Química del Sur. Universidad Nacional del Sur. Departamento de Química. Instituto de Química del Sur; Argentina
Author affiliation: Alvarez, Monica Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Química del Sur. Universidad Nacional del Sur. Departamento de Química. Instituto de Química del Sur; Argentina
Author affiliation: Garrido, Mariano Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Química del Sur. Universidad Nacional del Sur. Departamento de Química. Instituto de Química del Sur; Argentina
Author affiliation: Marcovecchio, Jorge Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; Argentina. Universidad Tecnológica Nacional. Facultad Regional Bahía Blanca; Argentina
Repository: CONICET Digital (CONICET). Consejo Nacional de Investigaciones Científicas y Técnicas
Authors: Arias, Andres Hugo; Vazquez Botello, Alfonso; Tombesi, Norma Beatriz; Ponce Vélez, Guadalupe; Freije, Rubén Hugo; Marcovecchio, Jorge Eduardo
Publication Date: 2010.
Language: English.
Abstract:
This paper is the first comprehensive survey of polycyclic aromatic hydrocarbons (PAHs) in coastal sediments in Bahia Blanca, Argentina, and provides useful information on their levels of concentration, composition, and sources of these pollutants. The total concentrations of PAHs ranged from 15 to 10,260 ng g-1. The highest contents (mean 3,315 ng g-1) of total PAHs in marine sediments were found in the inner channels of the estuary, while the lower ones (204 ng g-1) belong to samples collected far away from contamination sources. The global average recorded in this study (1,500 ng g-1) indicates that the studied area lies within the referenced category of industrialized coastal zones under chronic pollution. The diagenetic PAH contribution was found to be negligible at all sampled locations; however, the calculation of molecular ratios determined an overimposition of pyrolitic PAHs over the petrogenic input. Further, the use of principal components analysis (PCA) clearly separated ring group compounds and enabled the determination of pyrolitic/combustion PAHs dominancy.
Author affiliation: Arias, Andres Hugo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; Argentina
Author affiliation: Vazquez Botello, Alfonso. Universidad Nacional Autónoma de México; México
Author affiliation: Tombesi, Norma Beatriz. Universidad Nacional del Sur; Argentina
Author affiliation: Ponce Vélez, Guadalupe. Universidad Nacional Autónoma de México; México
Author affiliation: Freije, Rubén Hugo. Universidad Nacional del Sur; Argentina
Author affiliation: Marcovecchio, Jorge Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; Argentina. Universidad FASTA ; Argentina. Universidad Tecnológica Nacional; Argentina
Repository: CONICET Digital (CONICET). Consejo Nacional de Investigaciones Científicas y Técnicas
Authors: Quintas, Pamela Yanina; Oliva, Ana Laura; Arias, Andres Hugo; Domini, Claudia Elizabeth; Álvarez, Mónica Beatriz; Garrido, Mariano Enrique; Marcovecchio, Jorge Eduardo
Publication Date: 2016.
Language: English.
Abstract:
Twenty-four surface sediment samples were collected in the Bahı´a Blanca Estuary (Argentina) during 2013 in order to assess the occurrence of butyltin compounds. Then, six areas ranging from zones with intensive maritime traffic to other rural/recreational zones at the inner utmost point of the estuary were periodically sampled (3 months) along the whole year. After extraction/derivatization assisted by ultrasound, three target compounds— including monobutyltin (MBT), dibutyltin (DBT) and tributyltin (TBT)—were analyzed by means of gas chromatography/mass spectrometry (GS/MS). Total butyltin (TBts) levels ranged from 73.5 to 395.2 ng Sn g-1 dry wt TBT was the minor contributor, accounting for 12.6 % of the TBts. On the other hand, MBT, for which no baseline precedents were available, accounted for the 51.4 % of TBts. Sampling sites could be classified, in terms of environmental health regarding the organotin compounds (OTs) relationship, each from lightly (3–20 ng Sn g-1 dry wt) to moderately polluted (20–100 ng Sn g-1 dry wt). In the light of TBts levels, distributions and covariation with environmental parameters such as granulometry and sediment organic carbon the occurrence of DBT and MBT could not be uniquely attributed to the degradation pathway of the TBT; in fact, results outlined the possible contribution of some punctual and diffuse sources at the area such as refineries, PVC industry inputs and the city hall main sewage.
Author affiliation: Quintas, Pamela Yanina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; Argentina
Author affiliation: Oliva, Ana Laura. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; Argentina
Author affiliation: Arias, Andres Hugo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; Argentina
Author affiliation: Domini, Claudia Elizabeth. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Química del Sur. Universidad Nacional del Sur. Departamento de Química. Instituto de Química del Sur; Argentina
Author affiliation: Álvarez, Mónica Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Química del Sur. Universidad Nacional del Sur. Departamento de Química. Instituto de Química del Sur; Argentina
Author affiliation: Garrido, Mariano Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Química del Sur. Universidad Nacional del Sur. Departamento de Química. Instituto de Química del Sur; Argentina
Author affiliation: Marcovecchio, Jorge Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; Argentina. Universidad Tecnológica Nacional; Argentina. Universidad FASTA "Santo Tomas de Aquino"; Argentina
Repository: CONICET Digital (CONICET). Consejo Nacional de Investigaciones Científicas y Técnicas