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Artykuły w czasopismach na temat „Polychlorinated dibenzo-p-dioxins”

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Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 19 lutego 2023

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1

Gao, Xingbao, Bingjing Ji, Dahai Yan, Qifei Huang i Xuemei Zhu. "A full-scale study on thermal degradation of polychlorinated dibenzo-p-dioxins and dibenzofurans in municipal solid waste incinerator fly ash and its secondary air pollution control in China". Waste Management & Research: The Journal for a Sustainable Circular Economy 35, nr 4 (30.11.2016): 437–43. http://dx.doi.org/10.1177/0734242x16677078.

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Degradation of polychlorinated dibenzo- p-dioxins and dibenzofurans in municipal solid waste incinerator fly ash is beneficial to its risk control. Fly ash was treated in a full-scale thermal degradation system (capacity 1 t d−1) to remove polychlorinated dibenzo- p-dioxins and dibenzofurans. Apart from the confirmation of the polychlorinated dibenzo- p-dioxin and dibenzofuran decomposition efficiency, we focused on two major issues that are the major obstacles for commercialising this decomposition technology in China, desorption and regeneration of dioxins and control of secondary air pollution. The toxic equivalent quantity values of polychlorinated dibenzo- p-dioxins and dibenzofurans decreased to <6 ng kg−1 and the detoxification rate was ⩾97% after treatment for 1 h at 400 °C under oxygen-deficient conditions. About 8.49% of the polychlorinated dibenzo- p-dioxins and dibenzofurans in toxic equivalent quantity (TEQ) of the original fly ash were desorbed or regenerated. The extreme high polychlorinated dibenzo- p-dioxin and dibenzofuran levels and dibenzo- p-dioxin and dibenzofuran congener profiles in the dust of the flue gas showed that desorption was the main reason, rather than de novo synthesis of polychlorinated dibenzo- p-dioxins and dibenzofurans in the exhaust pipe. Degradation furnace flue gas was introduced to the municipal solid waste incinerator economiser, and then co-processed in the air pollution control system. The degradation furnace released relatively large amounts of cadmium, lead and polychlorinated dibenzo- p-dioxins and dibenzofurans compared with the municipal solid waste incinerator, but the amounts emitted to the atmosphere did not exceed the Chinese national emission limits. Thermal degradation can therefore be used as a polychlorinated dibenzo- p-dioxin and dibenzofuran abatement method for municipal solid waste incinerator source in China.

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2

Li, Honghua, Pu Wang, Yongming Ju, Wenjuan Li, Ruiqiang Yang, Gang Li, Wenqiang Ren, Jie Li i Qinghua Zhang. "Occurrence and Source Identification of Polychlorinated Dibenzo-p-dioxins and Dibenzofurans and Polychlorinated Biphenyls in Surface Sediments from Liangshui River in Beijing, China". International Journal of Environmental Research and Public Health 19, nr 24 (8.12.2022): 16465. http://dx.doi.org/10.3390/ijerph192416465.

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Polychlorinated dibenzo-p-dioxins and dibenzofurans and polychlorinated biphenyls were measured in the surface sediments of Liangshui River, the second largest drainage river in Beijing, China. The sum concentrations of polychlorinated dibenzo-p-dioxins and dibenzofurans and polychlorinated biphenyls ranged from 3.5 to 3019 (mean value: 184) pg g−1 dry weight and from 319 to 5949 (mean value: 1958) pg g−1 dry weight, and the corresponding World Health Organization toxic equivalent quantity values were 0.0011–5.1 pg TEQ g−1 dry weight and 0.0074–1.4 pg TEQ g−1 dry weight, respectively. The spatial distributions of polychlorinated dibenzo-p-dioxins and dibenzofurans and polychlorinated biphenyls showed increasing trends from urban area and development area to suburb. Principal component analysis revealed that polychlorinated dibenzo-p-dioxins and dibenzofurans contamination in the sediments may originate from pentachlorophenol and sodium pentachlorophenate and municipal solid waste incineration. Regarding polychlorinated biphenyls, the steel industry, combustion processes and usage of some commercial polychlorinated biphenyl products were identified as the major sources. The emission from a former steel plant could be the main contributor to polychlorinated biphenyls in urban areas. The mean value of the total toxic equivalent quantities in the sediment samples exceeded the Canadian interim sediment quality guidelines. Long-term wastewater irrigation increases the load of sediment-bound pollutants in agricultural soil and may pose potential ecological risks to crops and human health.

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3

Kožul, Darija, i Snježana Romanić. "Analysis of Polychlorinated Dibenzo-p-Dioxins and Polychlorinated Dibenzofurans in Soil and Sediment". Archives of Industrial Hygiene and Toxicology 60, nr 2 (1.06.2009): 243–57. http://dx.doi.org/10.2478/10004-1254-60-2009-1922.

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Analysis of Polychlorinated Dibenzo-p-Dioxins and Polychlorinated Dibenzofurans in Soil and SedimentThis review presents methods for the analysis of polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs), called dioxins, in soil and sediment. These compounds are produced as by-products of different combustion processes, and because of their persistency and toxicity they present a threat for animal and human health. Due to their high organic matter content, soil and sediment can accumulate dioxins and have become important secondary emission sources. Determining dioxins in these samples is complex because dioxins are present in trace levels and have to be separated from interferences whereas other classes of organic contaminants are present in higher concentrations. After sampling, follows extraction of compounds with a suitable solvent, extract clean-up from unwanted compounds, and qualitative and quantitative analysis. At the end of this review, we gave levels of PCDD/PCDFs found in soil and sediment samples.

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4

Sofilić, T., i J. Jendričko. "PCDDs/Fs Pollution from Metallurgical Processes in the Town of Sisak, Croatia". Archives of Metallurgy and Materials 59, nr 1 (1.03.2014): 293–97. http://dx.doi.org/10.2478/amm-2014-0048.

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Abstract In order to calculate the emission of polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans from metallurgical processes located in the town of Sisak, Croatia, this research has built on experiences from developed countries, where the emission factor values from individual metallurgical processes have been taken from the reference data and used for the estimate of the emission of these pollutions in the European countries. The calculation of the emission polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans from metallurgical processes located in the town of Sisak took into account annual outputs of sinter, pig iron, steel blooms and steel billets, as well as steel casts. The metallurgical processes installed in the town of Sisak between 1950 and 2010 emitted from Q1-TEQ =17 mg a-1 PCDDs/Fs in 2001 to Q1-TEQ =5823 mg a-1 in 1989, depending on the activity of these processes. Within the observed period, the largest source of PCDDs/Fs emission was the iron ore sintering plant. Within the observed timeframe, the town of Sisak did not experience any excessive air, soil or water pollution by polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans from the local metallurgical processes.

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5

Mitoma, Yoshiharu, Maki Takase, Yoshiko Yoshino, Taizo Masuda, Hideki Tashiro, Naoyoshi Egashira i Takashi Oki. "Novel Mild Hydrodechlorination of PCDDs, PCDFs, and co-PCBs inside Fly Ash Using a Calcium-Promoted Rhodium Carbon Catalyst in Methanol". Environmental Chemistry 3, nr 3 (2006): 215. http://dx.doi.org/10.1071/en06002.

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Environmental Context. The generic term ‘dioxins’, the family of which includes polychlorinated dibenzo-p-dioxins, polychlorinated dibenzofurans, and dioxin-like compounds such as coplanar polychlorinated biphenyls (co-PCBs), is used to describe highly toxic and mutagenic compounds. Many methods that involve high-temperature or high-pressure dry hydrogen conditions to ensure adequate decomposition for persistent chlorinated aromatic pollutants present disadvantages for repeated synthesis or recovery of vaporized dioxins and co-PCBs. We discovered that highly efficient degradation of dioxins in fly ash is accomplished in 24 h using metallic calcium and Rh/C in alcohol in a sealed tube at 25°C at 0.15 MPa. Abstract. Effective hydrodechlorination of polychlorinated dibenzo-p-dioxins, polychlorinated dibenzofurans, and dioxin-like compounds such as coplanar polychlorinated biphenyls in fly ash was achieved in 24 h using a simple stirring operation in a sealed tube with metallic calcium and Rh/C catalyst in an alcohol solution at room temperature with 0.15 MPa of increasing internal pressure. The initial 7806 pg dioxin toxic equivalent (TEQ) (g of ash)–1 of dioxins in fly ash, which had adsorbed inside the solid phase, was finally degraded to 23.6 pg of TEQ (g of ash)–1, according to estimation using gas chromatography–mass spectrometry analysis.

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6

(Bart) Bosveld, A. T. C., i Martin Van den Berg. "Effects of polychlorinated biphenyls, dibenzo-p-dioxins, and dibenzofurans on fish-eating birds". Environmental Reviews 2, nr 2 (1.07.1994): 147–66. http://dx.doi.org/10.1139/a94-010.

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Fish-eating birds are top predators at the end of the aquatic food chain. As such, they accumulate high concentrations of halogenated polycyclic aromatics like polychlorinated dibenzo-p-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs), and polychlorinated biphenyls (PCBs). In this paper the levels and effects of these compounds on fish-eating birds are reviewed. To discuss the causal relationships between these compounds and the effects, dose–response studies in various bird species are reviewed. Neurotoxicity and effects on reproduction, embryonic respiration, mixed-function oxidase isoenzyme activities, and vitamin A and thyroid hormone levels are discussed. Using data from the literature, the lowest observed effect levels are calculated for different end points, and differences in sensitivity between the species are discussed.Key words: fish-eating birds, polychlorinated dibenzo-p-dioxins, polychlorinated dibenzofurans, polychlorinated biphenyls, reproductive impairment, cytochrome P-450.

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7

Li, Xian-Wei, Etsuro Shibata i Takashi Nakamura. "THERMODYNAMIC PREDICTION OF VAPOR PRESSURES FOR POLYCHLORINATED DIBENZO-p-DIOXINS, POLYCHLORINATED DIBENZOFURANS, AND POLYBROMINATED DIBENZO-p-DIOXINS". Environmental Toxicology and Chemistry 24, nr 9 (2005): 2167. http://dx.doi.org/10.1897/04-528r.1.

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8

Reeuwijk, Noortje M., Antonia Talidda, Rainer Malisch, Alexander Kotz, Angelika Tritscher, Heidelore Fiedler, Marco J. Zeilmaker i in. "Dioxins (polychlorinated dibenzo-p-dioxins and polychlorinated dibenzo-furans) in traditional clay products used during pregnancy". Chemosphere 90, nr 5 (luty 2013): 1678–85. http://dx.doi.org/10.1016/j.chemosphere.2012.09.064.

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9

Heuvel, John P. Vanden, i George Lucier. "Environmental Toxicology of Polychlorinated Dibenzo-p-Dioxins and Polychlorinated Dibenzofurans". Environmental Health Perspectives 100 (kwiecień 1993): 189. http://dx.doi.org/10.2307/3431525.

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10

Vanden Heuvel, J. P., i G. Lucier. "Environmental toxicology of polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans." Environmental Health Perspectives 100 (kwiecień 1993): 189–200. http://dx.doi.org/10.1289/ehp.93100189.

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11

Choi, Geun-Hyoung, Dal-Soon Choi, Su-Myeong Hong, Oh-Kyoung Kwon, Hee Soo Eun, Jung Han Kim i Jin Hyo Kim. "Investigation on Polychlorinated Dibenzo-p-dioxins, Polychlorinated Dibenzofurans and Dioxin-like Polychlorinated Biphenyls of Grains and Estimation of Dietary Intake for Korean". Journal of Applied Biological Chemistry 55, nr 4 (31.12.2012): 253–61. http://dx.doi.org/10.3839/jabc.2012.040.

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12

Singh, Joginder, Walter Miles i Jean P. Barrette. "Determination of Polychlorinated Dibenzo-p-Dioxins in Technical Pentachlorophenol". Journal of AOAC INTERNATIONAL 68, nr 3 (1.05.1985): 583–86. http://dx.doi.org/10.1093/jaoac/68.3.583.

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Abstract Thirty-four technical pentachlorophenol samples from 4 different manufacturers were analyzed for the presence of hexa-, hepta-, and octachlorodioxins. A double column procedure for extraction and cleanup was used for processing the samples, followed by gas chromatographymassspectrometry for qualitative and quantitative determinations. All runs were performed isothermally on a packed glass column of 3% Dexsil 400. Octachloronaphthalene was used as an internal standard for quantitative estimations. The amounts of chlorodioxins found ranged from 1 to 38.5 ppm hexachlorodioxin, 119 to 562 ppm heptachlorodioxin, and 361 to 1723 ppm octachlorodioxin. Interfering polychlorinated diphenyl ethers and polychlorinated dibenzofurans were also observed in these samples.

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13

SASAKI, Yuko. "Polychlorinated Dibenzo-p-dioxins and Dibenzofurans in Organisms." Journal of Environmental Chemistry 10, nr 3 (2000): 517–32. http://dx.doi.org/10.5985/jec.10.517.

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14

Du, Xiuying, Naikai Zhu, Xijuan Xia, Zhicheng Bao i Xiaobai Xu. "ENHANCEMENT OF BIODEGRADABILITY OF POLYCHLORINATED DIBENZO-p-DIOXINS". Journal of Environmental Science and Health, Part A 36, nr 9 (30.09.2001): 1589–95. http://dx.doi.org/10.1081/ese-100106244.

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15

Wielgosiński, Grzegorz. "The Possibilities of Reduction of Polychlorinated Dibenzo-P-Dioxins and Polychlorinated Dibenzofurans Emission". International Journal of Chemical Engineering 2010 (2010): 1–11. http://dx.doi.org/10.1155/2010/392175.

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In the study the most important and known polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzo-furans (PCDFs) emission sources are presented and known methods of reduction of dioxin emission to the atmosphere are discussed in detail. It is indicated that the most relevant emission source is a combustion process. The mechanism of dioxin formation in thermal processes is presented in brief. The author characterized primary methods of reduction of PCDDs/PCDFs emission encompassing the interference into the combustion process to minimize their formation and discussed known secondary methods aimed at their removal from the stream of waste gases. It was attempted to make a critical assessment of PCDD/Fs reduction methods described in literature.

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16

Patrizi, Barbara, i Mario Siciliani de Cumis. "TCDD Toxicity Mediated by Epigenetic Mechanisms". International Journal of Molecular Sciences 19, nr 12 (18.12.2018): 4101. http://dx.doi.org/10.3390/ijms19124101.

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Dioxins are highly toxic and persistent halogenated organic pollutants belonging to two families i.e., Polychlorinated Dibenzo-p-Dioxins (PCDDs) and Polychlorinated Dibenzo Furans (PCDFs). They can cause cancer, reproductive and developmental issues, damage to the immune system, and can deeply interfere with the endocrine system. Dioxins toxicity is mediated by the Aryl-hydrocarbon Receptor (AhR) which mediates the cellular metabolic adaptation to these planar aromatic xenobiotics through the classical transcriptional regulation pathway, including AhR binding of ligand in the cytosol, translocation of the receptor to the nucleus, dimerization with the AhR nuclear translocator, and the binding of this heterodimeric transcription factor to dioxin-responsive elements which regulate the expression of genes involved in xenobiotic metabolism. 2,3,7,8-TCDD is the most toxic among dioxins showing the highest affinity toward the AhR receptor. Beside this classical and well-studied pathway, a number of papers are dealing with the role of epigenetic mechanisms in the response to environmental xenobiotics. In this review, we report on the potential role of epigenetic mechanisms in dioxins-induced cellular response by inspecting recent literature and focusing our attention on epigenetic mechanisms induced by the most toxic 2,3,7,8-TCDD.

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17

Urbaniak, Magdalena, Edyta Kiedrzyńska, Marcin Kiedrzyński, Michał Mendra i Adam Grochowalski. "The impact of point sources of pollution on the transport of micropollutants along the river continuum". Hydrology Research 45, nr 3 (6.11.2013): 391–410. http://dx.doi.org/10.2166/nh.2013.242.

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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 river quality. The samples were collected during the spring (high water flow) and summer season (serene water flow) of 2010. The river samples were collected from five stations located along the lowland Pilica River, including two stations situated above and below the Sulejow Reservoir. At the same time, samples from the outlets of 17 WTPs were collected. As evidenced by the results, the largest WTPs discharged up to 59.09 μg toxic equivalent (TEQ) of PCDDs/PCDFs and dl-PCBs per day during high flow events and up to 26.03 μg TEQ during serene water flows. During the same time, the smallest WTPs released on average 0.81 and 0.70 μg TEQ day−1, respectively. The obtained results have also demonstrated an increase in the TEQ concentration along the Pilica River continuum (from 4.75 to 6.25 pg TEQ L−1). The exception were samples collected below the dam where 63% TEQ reduction was observed compared to samples collected above the reservoir.

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Agapkina, G. I., E. S. Brodskii, A. A. Shelepchikov, D. B. Feshin i E. S. Efimenko. "Polychlorinated dibenzo-p-dioxins and dibenzofurans in Moscow soils". Moscow University Soil Science Bulletin 65, nr 3 (wrzesień 2010): 114–18. http://dx.doi.org/10.3103/s0147687410030038.

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Lin, W. C., G. P. Chang-Chien, C. M. Kao, L. Newman, T. Y. Wong i J. K. Liu. "Biodegradation of Polychlorinated Dibenzo-p-Dioxins byPseudomonas mendocinaStrain NSYSU". Journal of Environmental Quality 43, nr 1 (styczeń 2014): 349–57. http://dx.doi.org/10.2134/jeq2013.06.0215.

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MASUDA, YOSHITO. "Environmental pollution of polychlorinated dibenzo-p-dioxins and dibenzofurans." Eisei kagaku 34, nr 3 (1988): 197–209. http://dx.doi.org/10.1248/jhs1956.34.197.

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Kamada, Isao, Masamoto Komatsu, Toshiyuki Kaba i Kiroku Matsuno. "Emissions of polychlorinated dibenzo-p-dioxins from municipal incinerators." Nippon Eiseigaku Zasshi (Japanese Journal of Hygiene) 42, nr 6 (1988): 1071–82. http://dx.doi.org/10.1265/jjh.42.1071.

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Wen, Zhengcheng, Puzi Kang, Benxiao Cai, Zhihua Wang, Jiangrong Xu i Kefa Cen. "Mechanism of Polychlorinated Dibenzo-p-dioxins Degradation by Ozone". Asian Journal of Chemistry 27, nr 3 (2015): 1082–86. http://dx.doi.org/10.14233/ajchem.2015.18266.

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Servos, Mark R., Derek C. G. Muir i G. R. Barrie Webster. "Bioavailability of Polychlorinated Dibenzo-p-dioxins in Lake Enclosures". Canadian Journal of Fisheries and Aquatic Sciences 49, nr 4 (1.04.1992): 735–42. http://dx.doi.org/10.1139/f92-082.

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The bioavailability of 1,3,6,8-tetra- (T4CDD) and octachlorodibenzo-p-dioxin (O8CDD) was examined in large (40 m3) lake enclosures at the Experimental Lakes Area in northwestern Ontario. The polychlorinated dioxins (PCDDs) were added to replicate enclosures as a sediment slurry at a nominal concentration of 58–59 ng∙L−1. T4CDD was more bioavailable to caged benthic invertebrates and fish (white sucker, Catostomus commersoni) than O8CDD immediately after the addition to the enclosures. However, as the concentration of T4CDD in the water column rapidly declined, the bioavailability of T4CDD also declined. Sorption of PCDD to organic matter and rapid partitioning to sediments might have reduced the uptake of PCDDs directly from the water column. Accumulation of PCDDs in biota appeared to shift from direct equilibrium partitioning during the first few days, when the concentrations in the water column were relatively high, to a detrital food chain transfer as the freely available PCDDs in the water declined. This conclusion is supported by the results of the simple, four-compartment food chain model of Thomann and Connolly based on the uptake kinetics of PCDDs from water and food.

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24

Sakaki, Toshiyuki, i Eiji Munetsuna. "Enzyme systems for biodegradation of polychlorinated dibenzo-p-dioxins". Applied Microbiology and Biotechnology 88, nr 1 (22.07.2010): 23–30. http://dx.doi.org/10.1007/s00253-010-2765-2.

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Demond, Avery, Xiaohui Jiang, Kendra Broadwater, John Meeker, William Luksemburg, Martha Maier, David Garabrant i Alfred Franzblau. "Serum concentrations of polychlorinated dibenzo-p-dioxins among ceramicists". Chemosphere 118 (styczeń 2015): 350–56. http://dx.doi.org/10.1016/j.chemosphere.2014.09.074.

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Bignert, A., M. Olsson, P.-A. Bergqvist, S. Bergek, C. Rappe, C. de Wit i B. Jansson. "Polychlorinated dibenzo-p-dioxins (PCDD) and dibenzo-furans (PCDF) in seal blubber". Chemosphere 19, nr 1-6 (styczeń 1989): 551–56. http://dx.doi.org/10.1016/0045-6535(89)90369-x.

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Marinković, Natalija, Daria Pašalić, Goran Ferenčak, Branka Gršković i Ana Rukavina. "Dioxins and Human Toxicity". Archives of Industrial Hygiene and Toxicology 61, nr 4 (1.12.2010): 445–53. http://dx.doi.org/10.2478/10004-1254-61-2010-2024.

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Dioxins and Human ToxicityThe term dioxins usually refers to polychlorinated dibenzo-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs). As 2,3,7,8-tetrachloro-dibenzo-p-dioxin (TCDD) has the highest toxic potential, the toxic potentials of other PCDDs and PCDFs are defined in comparison with it. Human exposure to dioxins can be environmental (background), occupational, or accidental pollution. In the human body, dioxins are in part metabolised and eliminated, and the rest is stored in body fat. People vary in their capacity to eliminate TCDD, but it is also dose-dependent; the elimination rate is much faster at higher than lower levels. The liver microsomal P4501A1 enzyme oxygenates lipophilic chemicals such as dioxins. It is encoded by the CYP1A1 gene. Cytosolic aryl hydrocarbon receptor (AhR) mediates their carcinogenic action. It binds to dioxin, translocates to nucleus and together with hydrocarbon nuclear translocator (ARNT) and xenobiotic responsive element (XRE) increases the expression of CYP1A1.Dioxins are classified as known human carcinogens, but they also cause noncancerous effects like atherosclerosis, hypertension, and diabetes. Long-term exposures to dioxins cause disruption of the nervous, immune, reproductive, and endocrine system. Short-term exposure to high levels impairs the liver function and causes chloracne. The most sensitive population to dioxin exposure are the foetuses and infants.A large number of health effects have been documented in the scientific literature, and they all place dioxins among the most toxic chemicals known to man.

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Galimov, Sh N., A. Z. Abdullina, R. S. Kidrasova i E. F. Galimova. "Level of dioxins and glutathione system status in semen of male patients with infertility". Kazan medical journal 94, nr 5 (15.10.2013): 658–61. http://dx.doi.org/10.17816/kmj1913.

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Aim. To evaluate of contamination of ejaculate by polychlorinated Dibenzo-p-dioxins/furans and to analyze the glutathione system status in males with infertility. Methods. 168 infertile and 49 fertile men were examined. Semen analysis was made in accordance with the World Health Organization protocol. The semen levels of persistent organic pollutants (dioxins and furans) was determined by a combination of high-performance capillary gas chromatography and high-resolution mass spectrometry, glutathione-depended enzymes activity - by enzyme-linked immunosorbent assay. Results. It is found that the levels of priority environmental pollutants of dioxins and furans classes was 2,2-2,3 times higher in the semen of infertile men compared to fertile donors. The maximum level of the most toxic congener - 2,3,7,8-tetrachlorodibenzo-p-dioxin - was detected in patients pathospermia, which was found in most infertile patients. The glutathione redox system status in males with infertility was characterized by the decrease in the reduced tripeptide concentration, decreased activity of glutathione-depended xenobiotic detoxification enzymes (glutathione peroxidase and glutathione-S-transferase), multidirectional shifts of metabolism-mediating enzymes (inhibition of glutathione reductase associated with stimulation of g-glutamyltransferase). The molecular mechanisms of polychlorinated dioxins/furans toxicity for the male reproductive system are discussed, which may be mediated by redox state-sensitive signaling systems modulation. Conclusion. Contamination of semen in infertile men by environmental pollutants of polychlorinated dibenzo-p-dioxins and furans classes supports the hypothesis of the relationship of the reproductive pathology with environmental factors. The most important link in the pathogenesis of decreased fertility in men associated with anthropogenic pollution is the change of glutathione antioxidant/antitoxic system activity.

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Zhang, Chenxi, Xiaomin Sun i Mei Li. "Transformation of Polychlorinated dibenzo-p-dioxins and Polychlorinated Dibenzofurans in the Environment". Current Organic Chemistry 22, nr 11 (4.07.2018): 1041–49. http://dx.doi.org/10.2174/1385272822666180419155257.

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Müller, Jochen F., Caroline Gaus, Joelle A. Prange, Olaf Päpke, Ka Fai Poon, M. H. W. Lam i Paul K. S. Lam. "Polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans in sediments from Hong Kong". Marine Pollution Bulletin 45, nr 1-12 (wrzesień 2002): 372–78. http://dx.doi.org/10.1016/s0025-326x(01)00326-5.

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Nguyễn Khắc, Mạnh, Ái Quốc Trần, Tất Thành Nguyễn i Tuấn Việt Trần. "Các phương pháp phân tích polychlorinated dibenzo-p- dioxins và polychlorinated dibenzofurans". Journal of Military Science and Technology, VITTEP (20.12.2022): 141–49. http://dx.doi.org/10.54939/1859-1043.j.mst.vittep.2022.141-149.

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Polychlorinated dibenzo para-dioxins (PCDD) và polychlorinated dibenzofurans (PCDF) tại Việt Nam có hai nguồn chủ yếu từ hậu quả chiến tranh và các nguồn thải công nghiệp. Đặc biệt với bối cảnh nền công nghiệp lạc hậu sử dụng những kỹ thuật đã cũ như ở Việt Nam thì việc phải quan trắc và kiểm soát chặt chẽ các nguồn thải có khả năng sinh PCDD/PCDF là rất cần thiết. Trong bài viết này, độc tính của PCDD/PCDF, cách đánh giá độc tính thông qua hệ số độ độc tương đương (Toxic equivalent factors – TEF) và tổng độ độc tương đương (Toxic equivalent quantity – TEQ) được trình bày. Tiếp theo là quá trình hình thành và phát triển của các kỹ thuật phân tích PCDD/PCDF trên thế giới qua các thời kỳ được thảo luận chi tiết. Thông qua đó, thực trạng về ô nhiễm PCDD/PCDF tại Việt Nam được đề cập và các giải pháp xử lý được đề xuất.

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Roots, O., H. Kiviranta, T. Pitsi, P. Rantakokko, P. Ruokojärvi, M. Simm, R. Vokk i L. Järv. "Monitoring of polychlorinated dibenzo-p-dioxins, polychlorinated dibenzofurans, and polychlorinated biphenyls in Estonian food". Proceedings of the Estonian Academy of Sciences 60, nr 3 (2011): 193. http://dx.doi.org/10.3176/proc.2011.3.08.

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Sugita, Kazutoshi, Shozo Asada, Tetsuaki Yokochi, Tsuyoshi Okazawa, Mitsuhiro Ono i Sumio Goto. "Survey of polychlorinated dibenzo-p-dioxins, polychlorinated dibenzofurans and polychlorinated biphenyls in urban air". Chemosphere 29, nr 9-11 (listopad 1994): 2215–21. http://dx.doi.org/10.1016/0045-6535(94)90389-1.

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Sofilic, T., J. Jendričko, Z. Kovačevic i M. Ćosić. "Measurement of polychlorinated dibenzo-p-dioxin and dibenzofuran emission from EAF steel making proces". Archives of Metallurgy and Materials 57, nr 3 (1.10.2012): 811–21. http://dx.doi.org/10.2478/v10172-012-0089-1.

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Electric arc furnace (EAF) steel manufacturing is an important recycling activity which contributes to the recovery of steel resources and steel scrap/waste minimization. Because of the content of plastics, coatings and paintings as well as other nonferrous materials in the charge during melting, a strong emission of pollutants, including polluting substance group consists of persistent organic pollutions (POPs) represented by polycyclic aromatic hydrocarbon (PAH), polychlorinated biphenyls (PCBs), polychlorinated dibenzo-p-dioxins (PCDDs), and polychlorinated dibenzofurans (PCDFs) occurs. This study was set out to investigate emissions of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDDs/Fs) from the stack of a new electric-arc furnace-dust treatment plant installed during modernisation of the Melt Shop in CMC SISAK d.o.o., Croatia. Obtained results have been compared with previously obtained results of PCDDs/Fs emission measurements from the old electric-arc furnace dust treatment without dust drop-out box, as well as quenching tower. The total PCDDs/Fs concentration in the stack off gases of both electric arc furnaces EAF A and EAF B were 0.2098 and 0.022603 ng I-TEQ/Nm3 respectively, and these results are close to previous obtained results by other authors. The calculated values of the emission factors for PCDDs/Fs calculated on the basis of measured PCDDs/Fs concentration in the stack off gases in 2008 and 2011 were 1.09 and 0.22 ng I-TEQ/ ton steel, respectively.

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Łechtańska, Patrycja, i Grzegorz Wielgosiński. "The use of ammonium sulfate as an inhibitor of dioxin synthesis in iron ore sintering process". Ecological Chemistry and Engineering S 21, nr 1 (1.03.2014): 59–70. http://dx.doi.org/10.2478/eces-2014-0005.

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Abstract The main air pollutants in the sintering process of iron ore are polychlorinated dibenzo-p-dioxins, polychlorinated dibenzofurans (PCDD/Fs) and harmful dust. Ore sintering on sinter strands is one of the first technology steps in the ironworks. It is a process in which iron ore is crushed, subjected to annealing and mixed with appropriate additives, and then sintered in order to produce sinter which is the main component of iron in the blast furnace process. PCDD/Fs emissions were measured and the addition of ammonium sulfate as an inhibitor of the synthesis of dioxins in the sintering process of iron ore was studied.

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Ogawa, T., Y. Asai, M. Yamashita i T. Takasuga. "Detectable Dioxins in Human Saliva and Their Effects on Gingival Epithelial Cells". Journal of Dental Research 82, nr 10 (październik 2003): 849–53. http://dx.doi.org/10.1177/154405910308201017.

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Dioxin, a powerful hormone-disrupting chemical, exhibits serious health effects when it reaches body fat. Here we analyzed coplanar polychlorinated biphenyls (PCBs) and polychlorinated-dibenzo- p-dioxins (PCDDs) in human saliva as compared with blood specimens, and examined their effects on human gingival epithelial cells (HGEC). High levels of tri- and tetrachlorinated PCBs were found in saliva, whereas we detected predominantly hexa- and heptachlorinated PCBs in blood. Among PCDDs, the saliva and blood specimens contained mainly 1,2,3,4,6,7,8,9-octachlorodibenzo- p-dioxin (OCDD). Among the toxic dioxins proposed by the World Health Organization (WHO) in 1998, 2,3′,4,4′,5-pentachlorobiphenyl (PCB 118) and OCDD, which were mainly found in saliva, significantly induced IL-8 production in HGEC. Furthermore, these two dioxins markedly augmented IL-8 production stimulated with fimbriae from Porphyromonas gingivalis, which is well-known as a pathogenic factor in periodontal diseases. These results suggest that dioxins in saliva may be a risk factor for periodontal diseases.

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37

Mukerjee, Debdas. "Health Impact of Polychlorinated Dibenzo-p-dioxins: A Critical Review". Journal of the Air & Waste Management Association 48, nr 2 (luty 1998): 157–65. http://dx.doi.org/10.1080/10473289.1998.10463655.

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Mukerjee, Debdas, Olaf Päpke i Wilfried Karmaus. "Indoor Air Contamination With Polychlorinated Dibenzo-p-Dioxins and Dibenzofurans". Toxicology and Industrial Health 5, nr 5 (grudzień 1989): 731–45. http://dx.doi.org/10.1177/074823378900500511.

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Pentachlorophenol (PCP), used extensively for wood preservative purposes, contains trace amounts of polychlorinated dibenzo dioxins (PCDDs) and-dibenzofurans (PCDFs) as contaminants. Residues of these compounds are present on the surface and sub surface of the treated wood. These contaminants have the potential to wear (or migrate) away or volatilize from the wood surface and become entrained in ambient air or dust particles, and thus becom ing available for human contact. During the early sixties several day nursery facilities were built with PCP-treated wood in the northern part of West Germany. In this paper we describe the indoor air monitoring data in these kindergarten buildings and the associated possible long-term health risk. The indoor ambient air was found to be contaminated with highly toxic PCDDs/ PCDFs at pg/m3 levels. HxCDDs, HpCFs and OCDDs/OCDFs congeners were the major contaminants.

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Muto, Hajime, i Takuo Sugawara. "Polychlorinated dibenzo-p-dioxins and dibenzofurans in plywood combustion gas". Chemosphere 45, nr 2 (październik 2001): 145–50. http://dx.doi.org/10.1016/s0045-6535(00)00544-0.

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Singh, Shashi Bala, i Gita Kulshrestha. "Gas chromatographic analysis of polychlorinated dibenzo-p-dioxins and dibenzofurans". Journal of Chromatography A 774, nr 1-2 (lipiec 1997): 97–109. http://dx.doi.org/10.1016/s0021-9673(97)00336-1.

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Brzuzy, Louis P., i Ronald A. Hites. "Global Mass Balance for Polychlorinated Dibenzo-p-dioxins and Dibenzofurans". Environmental Science & Technology 30, nr 6 (styczeń 1996): 1797–804. http://dx.doi.org/10.1021/es950714n.

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Fattore, Elena, Luigi Viganò, Giulio Mariani, Andrea Guzzi, Emilio Benfenati i Roberto Fanelli. "Polychlorinated dibenzo-p-dioxins and dibenzofurans in River Po sediments". Chemosphere 49, nr 7 (listopad 2002): 749–54. http://dx.doi.org/10.1016/s0045-6535(02)00376-4.

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Horstmann, Michael, i Michael S. McLachlan. "Sampling bulk deposition of polychlorinated dibenzo-p-dioxins and dibenzofurans". Atmospheric Environment 31, nr 18 (wrzesień 1997): 2977–82. http://dx.doi.org/10.1016/s1352-2310(97)00106-4.

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Servos, Mark R., Derek C. G. Muir i G. R. Barrie Webster. "Environmental Fate of Polychlorinated Dibenzo-p-dioxins in Lake Enclosures". Canadian Journal of Fisheries and Aquatic Sciences 49, nr 4 (1.04.1992): 722–34. http://dx.doi.org/10.1139/f92-081.

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The environmental fate of 1,3,6,8-tetra- (T4CDD) and octachlorodibenzo-p-dioxin (O8CDD), two major dioxin congeners emitted into the environment, was studied in large (40 m3) lake enclosures at the Experimental Lakes Area in northwestern Ontario. The polychlorinated dioxins (PCDDs) were added to replicate enclosures as a sediment slurry at a nominal concentration of 58–59 ng∙L−1. Both congeners partitioned/settled rapidly to the surficial sediments where they persisted over the 2 yr of the study. Initially the concentrations of the T4CDD in water were higher than those of O8CDD, but the concentrations of the T4CDD in the water column declined more rapidly than those of O8CDD, with t1/2 of 2.6 ± 0.2 and 4.0 ± 0.3 d, respectively. Approximately 10–15% of the T4CDD and < 1% of the O8CDD detected in the water column during the first 48 h were determined to be truly dissolved. The rapid partitioning of O8CDD and to a lesser extent T4CDD to dissolved and particulate organic matter in the water column and sediments limited their bioavailability. Increased retentive capacity of the higher chlorinated PCDDs may explain the pattern of increasing concentration of PCDDs in sediments with increasing chlorine substitution observed in the Great Lakes and other aquatic environments.

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BUCHTA, M., i B. DOLEZAL. "ChemInform Abstract: Problems of Polychlorinated Dibenzo-p-dioxins and Dibenzofurans". ChemInform 22, nr 27 (23.08.2010): no. http://dx.doi.org/10.1002/chin.199127310.

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Hu, Keke, i Nigel J. Bunce. "Metabolism of polychlorinated dibenzo-p-dioxins by rat liver microsomes". Journal of Biochemical and Molecular Toxicology 13, nr 6 (1999): 307–15. http://dx.doi.org/10.1002/(sici)1099-0461(1999)13:6<307::aid-jbt4>3.0.co;2-p.

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Koester, Carolyn J., i Ronald A. Hites. "Calculated physical properties of polychlorinated dibenzo-p-dioxins and dibenzofurans". Chemosphere 17, nr 12 (styczeń 1988): 2355–62. http://dx.doi.org/10.1016/0045-6535(88)90146-4.

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Norwood, C. B., M. Hackett, R. J. Pruell, B. C. Butterworth, K. J. Williamson i S. M. Naumann. "Polychlorinated dibenzo-p-dioxins and dibenzofurans in selected estuarine sediments". Chemosphere 18, nr 1-6 (styczeń 1989): 553–60. http://dx.doi.org/10.1016/0045-6535(89)90166-5.

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Yang, Zhijun, Chuanhai Xia, Qing Zhang, Jiping Chen i Xinmiao Liang. "Catalytic detoxification of polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans in fly ash". Waste Management 27, nr 4 (styczeń 2007): 588–92. http://dx.doi.org/10.1016/j.wasman.2006.02.019.

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Wang, I.-Ching, Yee-Lin Wu, Long-Full Lin i Guo-Ping Chang-Chien. "Human dietary exposure to polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans in Taiwan". Journal of Hazardous Materials 164, nr 2-3 (30.05.2009): 621–26. http://dx.doi.org/10.1016/j.jhazmat.2008.08.040.

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