dioxin Articles
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Making “the Best” Better: Toward a More Useful Method of Reporting Dioxin and Dioxin-like Compounds
On October 29, 1999, the U.S. Environmental Protection Agency (EPA) published a final rule on reporting releases of persistent, bioaccumulative, and toxic (PBT) substances under the Toxics Release Inventory (TRI).1 This rulemaking was controversial for a host of reasons, not the least of which was EPA’s decision to create the astonishingly low reporting threshold of 0.1 grams for the newly ...
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Capacity estimation and preliminary strategy for reducing the release of dioxins in China
As a party of the Stockholm Convention on Persistent Organic Pollutants, China must submit its national implementation plan (NIP) for this convention. The strategy and action plan for reducing the release of dioxins in China are the most important components of the NIP. Three problems are key points for developing such strategy and action plan—what are the key sources for applying the best ...
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Levels of dioxins in soil and corn tissues after 30 years of biosolids application
Detectable levels of dioxins have been reported in biosolids, but very little information is available on the effect of long-term application of biosolids on dioxins accumulation in soil and uptake by plants. We analyzed dioxins in soil and corn tissue samples from field plots after 30 continuous applications of biosolids at 0 (Control), 16.8, and 67.2 Mg biosolids ha−1 yr−1 resulting ...
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Dioxin and PCB determination in foodstuffs
SpeedExtractor E-914: Pressurized solvent extraction for the determination of dioxins and PCBs in dairy, egg, pork and fish The determination of dioxins and PCBs in foodstuffs is performed to monitor the potential exposure to humans. A reliable and fast method is introduced. Proficiency test samples were extracted with the SpeedExtractor E-914, followed by an automated clean-up using a MIURA ...
By BUCHI
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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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Bien Hoa, Vietnam - Case Study
In a project commissioned by the Global Environmental Facility and the United Nations Development Programme, EDL carried out a full-scale soil decontamination demonstration at a former US airbase in Vietnam. The trial successfully treated 150 tonnes of soil contaminated with Poly-Chlorinated Dibenzo-p-Dioxins and Dioxin-like Poly-Chlorinated Biphenyls; which are known to be amongst the most ...
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Maternally transferred dioxin‐like compounds can affect the reproductive success of European eel
Reported concentrations of dioxin‐like compounds accumulated in the European eel (Anguilla anguilla) were used to perform a risk assessment for eel larval survival, taking into account a modelled amplification of tissue concentrations with a factor of 1.33 during spawning migration. The calculated concentrations of dioxin‐like compounds finally deposited in the eggs were compared to the ...
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Dioxin sampling – A long term view
1) Introduction The expansion of the number of processes requiring measurement of emitted dioxins and the release of a new CEN Standard - EN 1948 - will significantly alter the market for instrumentation. Within the EU, individual member states will implement their own strategies for process approval based on dioxin sampling. However, typically processes are assessed quarterly, biannually or ...
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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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Sediment dioxin levels as the basis for risk assessment and human health criteria
Methods for assessing human health risks and establishing water quality criteria under the Clean Water Act are based on the assumption that fish accumulation of dioxin is correlated with the dissolved phase of the dioxin in the water column by a water-to-fish predictive factor called a bioconcentration factor. However, dioxin does not remain dissolved in the water column to any significant ...
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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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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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Polytopic vector analysis of soil, dust, and serum samples to evaluate exposure sources of PCDD/Fs
As part of the University of Michigan Dioxin Exposure Study, soil, household dust, and serum samples were collected from over 750 households in five populations around the city of Midland and in Jackson and Calhoun Counties, Michigan, USA. Polytopic vector analysis, a type of receptor model, was applied to better understand the potential sources of polychlorinated dibenzo‐p‐dioxins and ...
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Technology Selection and Conceptual Design for Cleanup of Dioxin Contamination at the Da Nang Airport Hot Spot, Viet Nam
Large volumes of Agent Orange and other defoliants were handled at former United States (U.S.) military bases during the U.S.-Viet Nam War. Agent Orange was contaminated by 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD), a toxic chemical that has been associated with a range of health concerns. The airports at Da Nang, Bien Hoa, and Phu Cat have been identified as the most contaminated of the ...
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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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Cardiac toxicity by sublethal 2,3,7,8‐tetrachlorodibenzo‐p‐dioxin correlates with its anti‐proliferation effect upon cardiomyocytes in zebrafish embryos
The cardiac toxicity of zebrafish embryos in response to the lethal dose of 2,3,7,8‐tetrachlorodibenzo‐p‐dioxin (TCDD) has been well characterized. However dioxin contamination levels in nature are usually lower and sublethal TCDD toxicity is less investigated. We found that for the 72 hours post fertilization (hpf) zebrafish embryos, the non‐lethal doses of TCDD were 25 pg/ml and lower. 10 ...
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Modelling wet and dry depositions of PCDD/F releases from industrial plants in Apulia, Southern Italy
The modelling system RAMS/CALMET/CALPUFF was used to simulate the atmospheric dispersion and deposition of dioxins emitted from industrial sources over the Province of Lecce (Italy). Comparison between data and predictions shows that the model reasonably simulates the deposition patterns. Dry deposition of PCDD/F extends mainly downwind of the sources following the prevailing wind direction. Wet ...
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GT90 Dioxin+ Enabling Reliable Dioxin Monitoring for Eco-Research
In this article, our client and environmental research expert, Dr. Werner Tirler, also the Director of Eco-Research tells about their experiences of using Gasmet’s dioxin monitoring system, GT90 Dioxin+. According to him, it is a very robust and durable device, which enables reliable sampling of dioxins for his laboratory. Eco-Research Is A Specialist in Environmental Pollutant Detection ...
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Gasmet GT90 Dioxin+ Is an Effective Solution for Dioxin Sampling
In this article we introduce you to the world of continuous dioxin monitoring and the Gasmet GT90 Dioxin+, which is an exceptionally robust dioxin sampling system. Did you know that it was designed to sample even the lowest dioxin and dioxin-like compound concentrations in harsh industrial environments, even in subfreezing conditions? In addition to dioxins, the system is capable of measuring ...
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