furan Articles
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Production of p-Methylstyrene and p-Divinylbenzene from Furanic Compounds
A four-step catalytic process was developed to produce p-methylstyrene from methylfuran, a biomass-derived species. First, methylfuran was acylated over zeolite H-Beta with acetic anhydride. Second, the acetyl group was reduced to an ethyl group with hydrogen over copper chromite. Third, p-ethyltoluene was formed through Diels–Alder cycloaddition and dehydration of 2-ethyl-5-methyl-furan ...
By SusChem
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Evaluating Food Products for Furan and Other Volatile Organic Compounds
Abstract The US Food and Drug Administration (FDA) published the results of a survey of furan in canned and jarred foods that undergo heat treatment in 2004. In the same year, the European Food Safety Authority agreed with the findings of the FDA report and determined that more research was needed on the study of furan in food. One of the techniques used by the FDA for furan in the foods that ...
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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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Determination of Furan in Coffee by Static and Dynamic Headspace-GC–MS
Abstract Coffees have aroma and taste based on where the beans are grown, roasting techniques, and flavor additives. One component of the bean responsible for the aroma and some of the taste are volatile organic compounds (VOCs). Furan is one VOC that has recently been investigated in food (1). An FDA method for furan in food uses static headspace and requires 30 min of incubation time at 60 ...
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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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New operating mode for on-line analysis of dioxin emission from stationary sources
Dioxins and furans are produced by an incomplete combustion of organic and chlorinated compounds Generated by stationary sources such as waste incinerators, cement/metal working industry… Dispersal in the environment as aerosols, accumulation in the food chain ...
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Ecological risk assessment for mink and short‐tailed shrew exposed to PCBs, dioxins and furans in the Housatonic River area
A probabilistic risk assessment was conducted to characterize risks to a representative piscivorous mammal (mink, Mustela vison) and a representative carnivorous mammal (short‐tailed shrew, Blarina brevicauda) exposed to PCBs, dioxins and furans in the Housatonic River area downstream of the General Electric (GE) facility in Pittsfield, Massachusetts. Contaminant exposure was estimated using a ...
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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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A High-Performance Base-Metal Approach for the Oxidative Esterification of 5-Hydroxymethylfurfural
Exploring high-performance base-metal approaches for the sustainable production of chemicals from biomass is presently attracting immense interest and is truly important to promote their industrialized application. Herein, CoOx-N/C and α-MnO2 were combined as a base-metal catalyst that can achieve high yields of furan-2,5-dimethylcarboxylate (FDMC, 95.6 %) for the catalytic ...
By SusChem
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Chlorinated hydrocarbons - Case Study
Example: Pharmaceutical industry Similar tasks: Chemical industry The Pharmaceutical industry uses different processes to create chlorinated hydrocarbons. In a regenerative thermal oxidiser (RTO) the chlorinated organic contaminants are destroyed at high temperature. Chlorinated hydrocarbons - among others - are converted into hydrogen chloride which produces a hydrochloric acid solution after ...
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An incinerator air quality impact assessment for metals, PAH, dioxins and furans by using the MM5-CMAQ-EMIMO atmospheric modelling system: Spain case study
In this paper, we show the implementation of a modified version of MM5-CMAQ for carrying out an air quality impact analysis for installing an incinerator in the Basque Country model domain (Spain). The modified CMAQ model (EPA USA, 2004) includes Poly-Chlorinated Dibenzop-Dioxins and Dibenzo-Furans (dioxins and furans). This model represents their congeners as divided between gaseous and aerosol ...
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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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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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Contaminant exposure of birds nesting in Green Bay, Wisconsin
In earlier studies, elevated polychlorinated biphenyl (PCB) and p,p'‐dichlorodiphenyldichloroethylene (DDE) concentrations were reported in double‐crested cormorant (Phalacrocorax auritus) eggs and tree swallow (Tachycineta bicolor) eggs and nestlings collected from lower Green Bay in 1994 and 1995 and black‐crowned night‐heron (Nycticorax nycticorax) eggs collected in 1991. Comparable samples ...
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Resistance to heavy metals and bioaccumulation of lead and zinc by Chryseobacterium solincola strain 1YB-R12T isolated from soil
A novel species of the genus Chryseobacterium which was isolated from soil, has been studied for resistance to heavy metals (lead, chromium, nickel, zinc, cadmium, copper and cobalt), antibiotic and its capacities for bioaccumulation of lead and zinc. It exhibited high minimal inhibitory concentration (MIC) values for metal ions tested ranging from 75 mg/l to 500 mg/l and antibiotic ...
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Gases that cause the most air pollution
Air pollution is the presence of dangerous substances in the atmosphere in concentrations high enough and for durations long enough to cause harm or undesirable effects. Chemicals, dust, suspended particles and gases, among others, pollute the air we breathe every day. The emissions of gases can be caused by natural or human factors, but only the gases generated by human activities, such as ...
By TECAM
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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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Dioxines and furanes - Case Study
Example: Scrap copper recycling, cobalt for battery production Similar tasks: Metal recycling, roast processes, thermal waste disposal When recycling metals - as in scrap copper recycling (mostly cable material) - toxic waste gases often occur. The raw materials to be recycled are injected in a shaft kiln that emits dust, organic contaminants, carbon monoxide, dioxins as well as furans. A high ...
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Northern Rivers Ecosystem Initiative: Distribution and Effects of Contaminants
In response to a number of recommendations following the Northern Rivers Basin Studies (NRBS) contaminant program, the Northern Rivers Ecosystem Initiative (NREI) focused considerable attention on assessing contaminants from specific sources including pulp mill effluents, atmospheric transport of mercury and the Alberta oil sands operations. NRBS identified a number of major contaminants of ...
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FGD, DeNOx, DeSOx – control precisely the absorber/neutralizer injection - Case Study
Material: raw gases HCl, NOx, Hg, SO2, (CO, O2, H2O) Installation: before the injection point Function: online monitoring of gas parameters allowing for precise adjustment of absorber/neutralizer injection, to comply with emission regulations (ELV) (9) •• Pollutants abatement During combustion or incineration process, acids are produced due to the composition of the fuels or plastics ...
By ENVEA
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