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Pamela Yanina Quintas

Bio: Pamela Yanina Quintas is an academic researcher from Facultad de Ciencias Exactas y Naturales. The author has contributed to research in topics: Chemistry & Chromatography. The author has an hindex of 6, co-authored 16 publications receiving 128 citations. Previous affiliations of Pamela Yanina Quintas include National Scientific and Technical Research Council & Universidad Nacional del Sur.

Papers
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Journal ArticleDOI
TL;DR: The ecotoxicological evaluation showed that some of the individual PAHs were in excess of the effect range low (ERL) and the effects range median’s threshold; then, predicted occasional and frequent adverse effects over the surrounding biota at the area of study were determined.
Abstract: Thirty-four surface sediment samples were collected from Bahia Blanca Estuary, Argentina, to evaluate polycyclic aromatic hydrocarbon (PAH) contamination and ecotoxicity risk by applying sediment-quality guidelines (SQGs) and toxic equivalent factors (TEQ). Total concentrations of 17 parent PAHs, including the 16 United States Environmental Protection Agency priority PAHs, were measured using gas chromatography–mass spectrometry, and their levels ranged from 19.7 to 30,054.5 ng/g dry weight. The greatest values were found near the urban/industrial core and decreasing as the distance from that site increased. Molecular ratios determined mixed sources of PAHs with a slight imposition of pyrolitic over the petrogenic inputs. The ecotoxicological evaluation, based on the SQG model, showed that some of the individual PAHs were in excess of the effects range low (ERL) and the effects range median’s threshold; then, predicted occasional (ERL) and frequent adverse effects over the surrounding biota at the area of study were determined. Total PAH levels were expressed as benzo-a-pyrene TEQ and compared with literature data.

59 citations

Journal ArticleDOI
TL;DR: Quintas et al. as discussed by the authors presented a model for oceanographic research at the Instituto Argentino de Oceanografia (IODO) in Argentina, which is a part of the Consejo Nacional de Investigaciones Cientificas and Tecnicas.
Abstract: Fil: Quintas, Pamela Yanina. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Bahia Blanca. Instituto Argentino de Oceanografia. Universidad Nacional del Sur. Instituto Argentino de Oceanografia; Argentina

19 citations

Journal ArticleDOI
TL;DR: Levels of tributyltin and its breakdown compounds, including the first record of monobutyltin (MBT) in history for Latin America, were determined in native mussels by means of CG-MS, after extraction/derivatization assisted by ultrasound.

17 citations

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TL;DR: The present LCxLC method was optimized for the separation of amino acids present in honey samples, taking into account key parameters that influence the bidimensional peak capacity (orthogonality, sampling frequency, etc.).

15 citations

Journal ArticleDOI
TL;DR: Mussel body burdens were dominated by lower molecular weight PAHs, such as phenanthrene, naphthalene, and pyrene, whereas the overallPAHs profile suggested the predominance of petrogenic sources.
Abstract: Bivalves, especially mussels, have been pointed as putative species to monitor polycyclic aromatic hydrocarbons (PAHs) in marine environment. After several environmental PAHs baseline reports, the present study was conducted to assess for the first time the levels of PAHs in native mussels (Brachidontes rodriguezii) collected from a critical industrialized estuary of Argentina. Under this objective, after an 18-month sampling period, 34 pools of mussels were assessed for 17 PAHs, including the 16 compounds prioritized by United States Environmental Protection Agency. By means of gas chromatography–mass spectrometry analysis, results showed total PAHs concentrations in mussel’s tissue ranged from under laboratory detection limits to 482.4 ng/g dry weight. Mussel body burdens were dominated by lower molecular weight PAHs, such as phenanthrene, naphthalene, and pyrene, whereas the overall PAHs profile suggested the predominance of petrogenic sources. Finally, the potential ecotoxicological impact was evaluated by applying Environmental Assessment Criteria and benzo[a]pyrene toxic equivalent factors.

15 citations


Cited by
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Journal ArticleDOI
TL;DR: Estuarine conservation plans should consider year-round fluctuations of the ecocline and the resulting cycles of retention and flush of environmental signals and their influence on trophic webs over the whole extent of estuarine gradients.

219 citations

Journal ArticleDOI
TL;DR: Ionic liquids (ILs) are a highly unique class of non-molecular solvents that possess melting points below 100 ºC and possess a wide variety of unique physico-chemical properties, including low or negligible vapor pressure at room temperature, high thermal and electrochemical stability, and high conductivity.
Abstract: Ionic liquids (ILs) are a highly unique class of non-molecular solvents that possess melting points below 100 ºC.1 ILs that have melting points below room temperature are often referred to as room temperature ionic liquids (RTILs). ILs possess a wide variety of unique physico-chemical properties, including low or negligible vapor pressure at room temperature, high thermal and electrochemical stability, and high conductivity.2.

163 citations

01 Jan 1998
Abstract: Contamination by butyltin (BTs) and organochlorine compounds (OCs) in green mussels collected along the coastal areas of Thailand, Philippines and India during the period of 1994–1997 was examined. The BT residues in green mussel were widely detected, suggesting a widespread contamination along the coastal waters of Asian developing countries. Relatively high concentrations of BTs in green mussel were found in high boating activity and coastal aquaculture areas, implying the usage of TBT as a biocide in antifouling paints used on boat hulls and marine aquaculture facilities. The composition of BT derivatives in mussel was in the order of TBT>DBT>MBT, suggesting also the presence of significant butyltin source in Asian coast. BT residues pattern in green mussels from Thailand revealed higher levels in aquaculture than in boating activity sites. This result may indicate that the developing countries showing high economic growth rate (like Thailand) tend to increase the usage of TBT for aquaculture activities. BT contamination levels in Asian developing countries were lower than those in developed nations. However, considering the fact that the unregulated usage of organotins in Asian developing countries and the increasing demand for antifouling paints in Asia–Pacific regions, BTs contamination in aquatic environment may be serious in future. Concentrations of OCs detected in green mussels were lower than BTs. Considerable residues of p,p′-DDT found in mussel indicated the current usage of DDTs in Asian regions. HCHs and DDTs contamination in India is apparently higher than in other Asian developing countries. The present study clearly indicates that the aquatic environment in Asia–Pacific regions is still being contaminated by some OCs. To our knowledge, this is a first report on the detection of butyltin compounds in green mussels (Perna viridis) from Thailand, Philippines and India.

150 citations

Journal ArticleDOI
TL;DR: The key role of microplastics as a "potential contaminant vector" for other types of pollutants was confirmed and a relatively good significant linear relationship exists between microplastic quantities and potentially toxic element/polycyclic aromatic hydrocarbon concentrations in coastal sediments.

115 citations

Journal ArticleDOI
TL;DR: The release and photodegradation of OTCs were both inhibited at high salinity conditions, probably due to the enhanced re-adsorption of O TCs on PVC microplastics and the formation of halogen radicals that were less reactive towards neutral OTCS.
Abstract: Photochemical weathering leads to degradation of microplastics and releases chemical additives, polymeric fragments, and/or byproducts. This study evaluated the release kinetics of organotin compounds (OTCs) from three different sized (10-300 μm) polyvinyl chloride (PVC) microplastics under UV- and visible light irradiation. Four OTCs, dimethyltin (DMT), monomethyltin (MMT), dibutyltin (DBT), and monobutyltin (MBT), were found to release from PVC particles after 24 h leaching in darkness ranging from 2 to 20 μg·g-PVC-1. Under UV/visible light irradiation, only DMT and DBT were detectable, whereas MMT and MBT were not detected due to rapid photodegradation. The total tin concentrations (including organic and inorganic tins) in the aqueous phase monotonically increased under light exposure. By contrast, they reached plateaus after 24 h in darkness, confirming the photodegradation of OTCs. A release kinetics model was established and correctly interpreted the microplastics size effect on the OTC release process. Finally, the impacts of salinity and dissolved organic matter (DOM) were investigated. The release and photodegradation of OTCs were both inhibited at high salinity conditions, probably due to the enhanced readsorption of OTCs on PVC microplastics and the formation of halogen radicals that were less reactive toward neutral OTCs. The presence of DOM, however, increased OTCs release probably because the excited state triplet DOM (3DOM*) formed and reacted with OTCs from PVC microplastics.

105 citations