Search results for "PCBs"

showing 3 items of 13 documents

Comparison of stable isotope composition and inorganic and organic contaminant levels in wild and farmed bluefin tuna, Thunnus thynnus, in the Medite…

2009

Abstract Stable isotope composition (δ13C and δ15N) and persistent pollutants, including heavy metals (Hg, Cd, Pb, As, Cu, Zn) and organochlorine compounds (PCBs, HCB and p,p′-DDE), were measured in muscle and liver tissues of wild and farmed bluefin tunas to investigate the changes occurring during the farming period and to assess the quality, in terms of contaminants, of the final product. At the end of farming, the food supplied was clearly integrated into the tuna tissues as derived from stable isotope signatures, and, contrarily to the literature findings obtained for other species, farmed tunas showed slight variations in persistent elements and chemical compounds in comparison with w…

Settore BIO/07 - EcologiaEnvironmental EngineeringDichlorodiphenyl DichloroethyleneHealth Toxicology and MutagenesisFish farmingAquaculturechemistry.chemical_compoundAquacultureMetals HeavyPCBs HCB pp’-DDE heavy metals stable isotopes tuna farmingHexachlorobenzeneHydrocarbons ChlorinatedMediterranean SeaAnimalsEnvironmental ChemistryPollutantCarbon IsotopesNitrogen IsotopesbiologyTunabusiness.industryChemistryStable isotope ratioPublic Health Environmental and Occupational Healthfood and beveragesGeneral MedicineGeneral ChemistryHexachlorobenzeneContaminationbiology.organism_classificationPolychlorinated BiphenylsPollutionLiverEnvironmental chemistryMultivariate AnalysisbusinessTunahuman activitiesWater Pollutants ChemicalThunnusEnvironmental MonitoringChemosphere
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Polychlorinated Biphenyls in Sediments from Sicilian Coastal Area (Scoglitti) using Automated Soxhlet, GC-MS, and Principal Component Analysis

2014

A methodology for the PAHs and PCBs congener determination in sediment samples has been revised. We determined the distributions of PAHs and PCBs in the superficial sediments of the Scoglitti (Italy) coastal area to provide data for comparison with other marine systems and to hypothesize the sources. Extraction yield, for PCB, was never less than 60% in most cases, while for PAHs, utilizing perdeuterated surrogate standard (benz[a]anthracene-d12 and anthracene-d10) was never less than 72%. The total concentration of the 16 PAHs investigated, expressed as the sum of concentrations, PAHs, varied from 1–5087 μg/kg of dry matrix, while the PCBs ranged from detection limit to 36 μg/kg of dry mat…

chemistry.chemical_classificationDetection limitScoglitti (Italy)ChromatographyPolymers and PlasticsPCA analysisChemistryOrganic ChemistryExtraction (chemistry)Sedimentautomated Soxhlet GC-MS PAHs PCA analysis PCBs Scoglitti (Italy)automated SoxhletMatrix (chemical analysis)CongenerPAHsEnvironmental chemistryPrincipal component analysisMaterials ChemistryOrganic matterPCBsGas chromatography–mass spectrometryGC-MS
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Photochemical sample treatment: A greener approach for PCBs analysis in sediments

2012

Electrical installations and industrial outlets are the major source in environment of chlorinated organic compounds. These are distributed in several geographical areas through long-range atmospheric transport and deposition. Additionally, chlorinated organic compounds can be introduced in the food chain and reach the consumers in very high levels. Besides toxicological studies on PCBs, recent research is focusing on more sophisticated analytical methods for PCBs detection. Distribution and dispersion of PCBs mostly occur through air, water, soils, and sediments. The latter are complex matrices whose analysis often involves costly extraction and purification procedures. In particular, PCBs…

photochemical PCBs sediment green chemistrySettore CHIM/12 - Chimica Dell'Ambiente E Dei Beni Culturali
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