PCDFs Articles
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GC-MS Analysis of Polychlorinated Dibenzodioxins and Polychlorinated Dibenzofurans
Polychlorinated dibenzodioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) consist of 210 different compounds with varying degrees of toxicity, and the 17 congeners with chlorine substitution in the 2,3,7,8 positions are considered the most toxic. This chromatogram illustrates the separation of a 17 component 2,3,7,8-substituted PCDD and PCDF standard on a 30 m x 0.25 mm I.D. x 0.25 μm ...
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Prevention of dioxins de novo formation by ethanolamines
Abstract Two inhibitors, triethanolamine (TEA) and monoethanolamine (MEA), were tested for their ability to prevent the de novo formation of polychlorinated dibenzo- p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) on sinter plant fly ash. The amounts of both PCDDs and PCDFs, formed by thermal treatment of the fly ash, decreased when inhibitors were added. Up to 90% reduction of the ...
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Salla, Kursu 2013–2015 - Case Study
Old sawmill site Pollutants: PCDDs and PCDFs, Oil, chlorophenols Levels of pollutants on average: PCDD/Fs 170000 ng/kg, Oil 2000–30000 mg/kg, chlorophenols 100–1000mg/kg Total amount of thermally treated soil 55000 t Target after treatment: PCDD/Fs 50 ng/kg, Oil 50 mg/kg, chlorophenols 40 mg/kg ...
By Savaterra Oy
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Determination of Dioxins and Furans in Soil using the SpeedExtractor E-916
Polychlorinated dibenzo dioxins (PCDDs) and polychlorinated dibenzo furans (PCDFs) are persistent organic pollutants (POPs) banned by the Stockholm Convention and they are therefore monitored worldwide. PCDDs and PCDFs were extracted from a soil sample with the SpeedExtractor E-916 and an ASE 200 system (Dionex) according to the U.S. EPA Method 3545A. Dioxin and furan congeners were determined by ...
By BUCHI
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Parallel Pressurized Solvent Extraction of PCDD/PCDF, PBDE, and PFC from Soil, Sludge, and Sediment Samples
The efficacy of pressurized solvent extraction with BUCHI's new SpeedExtractor was examined for the extraction of dioxins/furans (PCDDs/PCDFs), polybrominated diphenyl ethers (PBDEs), and perfluorinated compounds (PFCs) from different environmental matrices: PCDDs/PCDFs from soil samples, PFCs from soil and sewage sludge, and PBDEs from lake sediments. The results of the extraction of PCDDs/PCDFs ...
By BUCHI
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Spatial distribution of PCDDs, PCDFs and dl-PCBs along the cascade of urban reservoirs
The river environment is a highly complex system with a variety of processes continuously changing along its continuum (River Continuum Concept). Therefore identification of the threats that result from different elements of the river ecosystem is an intricate task, mainly because of the transportation and biological, geological and chemical processes occurring in such a system. The overall ...
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Advances in analytical techniques for polychlorinated dibenzo-p-dioxins, polychlorinated dibenzofurans and dioxin-like PCBs
Abstract Analytical techniques for the determination of polychorinated dibenzo-p-dioxins (PCDD), polychlorinated dibenzofurans (PCDF) and dioxin-like PCBs (DLPCB) are reviewed. The focus of the review is on recent advances in methodology and analytical procedures. The paper also reviews toxicology, the development of toxic equivalent factors (TEF) and the determination of toxic equivalent ...
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Dietary‐ and tissue‐based exposure of belted kingfisher to PCDFs and PCDDs in the Tittabawassee River floodplain, Midland, MI, USA
Concentrations of polychlorinated dibenzofurans (PCDFs) and other dioxin‐like compounds in soils and sediments of the Tittabawassee River and associated floodplains downstream of Midland, Michigan, USA, are greater than upstream sites. As a result of these concentrations, which are some of the greatest ever reported, a site‐specific exposure assessment of belted kingfisher breeding in the ...
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The impact of point sources of pollution on the transport of micropollutants along the river continuum
The main objectives of the presented study were to quantify the transfer of polychlorinated dibenzo-p-dioxins (PCDDs)/polychlorinated dibenzofurans (PCDFs) (polychlorinated dibenzo-p-dioxins/polychlorinated dibenzofurans) and dioxin-like polychlorinated biphenyls (dl-PCBs) along the river continuum and to evaluate the impact of wastewater treatment plants (WTPs) located in the catchment on the ...
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Hydrodechlorination/Detoxification of PCDDs, PCDFs, and co-PCBs in Fly Ash by Using Calcium Polysulfide
Dioxins like polychlorinated dibenzo-p-dioxins (PCSDDs), polychlorinated dibenzofurans (PCDFs) and polychlorinated biphenyls (PCBs) are mainly emitted from waste incinerators (WIs) and have become an international research focus because of its serious concerns over the adverse health effects. The detoxification of PCCDs/Fs and PCBs is very difficult because of their stable chemical structure. A ...
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Docking‐based 3D‐QSAR predict binding affinities to aryl hydrocarbon receptor for polychlorinated dibenzodioxins, dibenzofurans and biphenyls
Polychlorinated Dibenzodioxins (PCDDs), Dibenzofurans (PCDFs) and Biphenyls (PCBs) cause toxic effects after binding to an intracellular cytosolic receptor called the aryl hydrocarbon receptor (AhR). Thymic atrophy, weight loss, immunotoxicity, acute lethality, and induction of cytochrome P4501A1 have all been correlated with the binding affinity to AhR. To study the key molecular features for ...
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Persistent Organic Pollutants (POPs) in leachates from municipal landfills
The leachates from six municipal waste landfills, located in South-eastern Poland, were studied for the presence of major, Persistent Organic Pollutants (POPs) – PAHs, Polychlorinated Dibenzo-p-dioxins (PCDDs)/Polychlorinated Dibenzofurans (PCDFs), Polychlorinated Dibenzothiophenes (PCDTs) and Polybrominated diphenyl ethers (PBDEs). The measured concentrations varied with respect to the ...
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Dioxins and Furans on the Equity-5
Dioxins and furans are byproducts of several different industrial processes, including incineration and paper bleaching. The extreme toxicity of several of these compounds has made their analysis in environmental samples increasingly important. In this application, the 60m x 0.25mm ID x 0.25µm Equity-5 was used to separate all 17 of the 2,3,7,8-substituted PCDDs and PCDFs listed in US EPA ...
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Long-term sampling - A method for continuous emission monitoring of dioxins/furans and mercury
Introduction The continuous emission monitoring of the different compounds which are emitted by industrial facilities is an important topic to approve the compliance to different regulations like WID. However, there are several compounds which cannot be measured in real time. Specific dioxins/furans (PCCD/PCDF) and other POPs (Persistent Organic Pollutants) cannot be measured by online monitors. ...
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Multiple lines of evidence risk assessment of American robins exposed to polychlorinated dibenzofurans (PCDFS) and polychlorinated dibenzo‐P‐dioxins (PCDDS) in the Tittabawassee River floodplain, Midland, Michigan, USA
Concentrations of polychlorinated dibenzofurans (PCDF) and polychlorinated dibenzo‐p‐dioxins (PCDD) in Tittabawassee River floodplain soils and biota downstream of Midland, MI, USA are greater than regional background concentrations. A multiple lines of evidence approach was utilized to evaluate the potential for effects of PCDD/DFs on American robins (Turdus migratorius; AR) breeding in the ...
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Carbon Injection Proves Effective In Removing Dioxins
Untitled Document Summary: During the past several years, there has been growing concern about emission of polychlorinated di-benzo-p-dioxins and polychlorinated di-benzofurans (PCDDs/PCDFs). Dioxins and related compounds are byproducts of combustion formed by recombining other organic constituents and chemical reactions in the combustion effluent-gas stream. ...
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Relative sensitivities among avian species to individual and mixtures of AhR‐active compounds
Dioxins and dioxin‐like compounds (DLCs) are potent toxicants to most vertebrates. Sensitivities to DLCs vary among species. Here sensitivities of avian species (chicken [Gallus gallus], ring‐necked pheasant [Phasianus colchicus], Japanese quail [Coturnix japonica]) to some polychlorinated dibenzo‐p‐dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) were determined by use of ...
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2006-2016: 10 years of continuous dioxins monitoring in Italy. Which assessment for which perspective?
2006-2016: 10 years of continuous dioxins monitoring in Italy. Which assessment for which perspective? Polychlorinated dibenzo-p-dioxins (PCDD) and polychlorinated dibenzofurans (PCDF), more commonly named dioxins and furans are odorless, highly thermally stable, insoluble in water, highly liposoluble micropollutants present in traces in the environment, mainly produced during combustion with ...
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New developments in long-term sampling of dioxins
Introduction The emissions of Dioxins and Furans (Polychlorinated Dibenzodioxins and Dibenzofurans, PCDF/Ds) from industrial sources are still one of the most important issues discussed in public, politics and industry. Due to the fact that environmental regulations are on the way to be harmonised in the EU countries, the measurements of those compounds in the stack gas of e. g. waste ...
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Spatial and temporal variation, source profile and formation mechanisms of PCDDs/Fs in the atmosphere of an e‐waste recycling area, South China
The present study investigated the impact of typical electronic waste (e‐waste) dismantling activities on the distribution of polychlorinated dibenzo‐p‐dioxins (PCDDs) and dibenzofurans (PCDFs) in the adjacent atmospheric environment. The target areas included Longtang town, a well known e‐waste recycling site, and two impacted neighborhoods, all of which were within Qingyuan city, Guangdong ...
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