Temat: PCDDs - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Emission of Polychlorinated Dibenzo-p-Dioxins (PCDDs) and Polychlorinated Dibenzofurans (PCDFs) from Underfiring System of Coke Oven Battery
Autorzy:: Bigda, R.
Urbańczyk, W.
Mianowski, A.
Sobolewski, A.
Powiązania:: https://bibliotekanauki.pl/articles/123255.pdf
Data publikacji:: 2017
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: coke oven battery
PCDDs
PCDFs
dioxins
emission measurement
coke plant
Opis:: A coke oven battery is not considered as a significant source of polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) emissions; however, due to small amounts of chlorine in coal dioxins, dibenzofurans may be formed. The paper presents the attempts to determine the level of emission of PCDDs/PCDFs from the COB underfiring system and to confront the obtained results with the calculations based on the mass balance of chlorine in the coking process and reactions of both chlorophenols formation and PCDDs and PCDFs formation from mono- and polychlorophenols. There were PCDDs/PCDFs concentrations measured in flue gases from the underfiring system of two COBs at a Polish coking plant. The measurements included both an old and a new battery. The obtained concentrations of PCDDs/PCDFs were lower than reported in the literature (0.5-1.7 ng I-TEQ/Mg_coke), while the results for old COB were on average 3 times higher than for the new one. It was found that PCDDs/PCDFs emission from COB underfiring system is insignificant and that PCDDs/PCDFs formation during coal coking should consider the mechanisms of their formation from mono- and polychlorophenols, as well as the influence of process parameters on the synthesis.
Źródło:: Journal of Ecological Engineering; 2017, 18, 6; 21-29
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Measurement of polychlorinated dibenzo-p-dioxin and dibenzofuran emission from EAF steel making proces
Badania emisji wielochlorkowych dibenzo-p-dioksyn i dibenzofuranów z procesu wytwarzania stali w piecu łukowym
Autorzy:: Sofilić, T.
Jendricko, J.
Kovacević, Z.
Ćosić, M.
Powiązania:: https://bibliotekanauki.pl/articles/356433.pdf
Data publikacji:: 2012
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: produkcja stali
EAF
piece łukowe
persistent organic pollutions
PCDDs/Fs
dioxins
Opis:: 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.
Produkcja stali w piecu łukowym (EAF) jest ważnym elementem recyklingu stali co przyczynia sie do odbudowy zasobów stali i wykorzystania złomu i odpadów stalowych. Ze względu na zawartość tworzyw sztucznych, powłok i farb, jak również innych materiałów niezależnych we wsadzie, podczas topienia występuje silna emisja zanieczyszczeń, w tym grupy substancji składającej sie z trwałych zanieczyszczeń organicznych (POP) takich jak wielopierścieniowe węglowodory aromatyczne (PAH), wielochlorowe bifenyle (PCB), wielochlorowe dibenzo-[1,4]-dioksyny (PCDD) i wielochlorowe dibenzofurany (PCDF). Celem pracy jest zbadanie emisji wielochlorowych dibenzo-[1,4]-dioksyn i dibenzofuranów z nowego układu odpylania zainstalowanego w piecu łukowym w trakcie modernizacji huty CMC Sisak w Chorwacji. Uzyskane wyniki porównano z poprzednio uzyskanymi wynikami pomiarów emisji dioksyn i dibenzofuranów ze starego układu oczyszczania pyłów z pieca łukowego. Całkowite stężenie dioksyn i dibenzofuranów w gazach odlotowych z pieców łukowych A i B wynosi odpowiednio 0,2098 i 0,022603 ng I-TEQ/Nm3, i te wyniki są zbliżone do poprzednich uzyskanych wyników przez innych autorów. Obliczone wartości wskaźników emisji dioksyn i dibenzofuranów na podstawie zmierzonych koncentracji dioksyn i dibenzofuranów w gazach odlotowych w 2008 i 2011 wynosiły odpowiednio 1,09 i 0,22 ng I-TEQ / tonę stali.
Źródło:: Archives of Metallurgy and Materials; 2012, 57, 3; 812-821
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Levels and sources of PCDDs, PCDFs and dl-PCBs in the water ecosystems of central Poland — A mini review
Autorzy:: Zieliński, Marek
Kamińska, Joanna
Czerska, Marta
Ligocka, Danuta
Urbaniak, Magdalena
Powiązania:: https://bibliotekanauki.pl/articles/2178910.pdf
Data publikacji:: 2014-12-01
Wydawca:: Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:: environment
isotope dilution HRGC/HRMS
PCDDs/PCDFs
dl-PCBs
sediments
surface water
Opis:: Polychlorinated dibenzo-p-dioxins (PCDDs) and dibenzofurans (PCDFs) are unwanted by-products in a variety of industrial and thermal processes. They have been present on Earth long before the human era, since they may be also formed as a result of forest fires or volcanic explosions. Polychlorinated biphenyls (PCBs) in turn, have been intentionally produced by humans. Poland was a minor producer of PCB mixtures (Chlorofen and Tarnol), which were a source of direct and indirect environmental diffusion with PCB and less with PCDDs/PCDFs. Industrial accidents with PCDDs/PCDFs were absent in Poland. Their stability and resistance to thermal breakdown made them very dangerous for environment and, in consequence, due to their environmental persistence, bioaccumulation and biomagnification in the terrestrial and aquatic food chains, to humans. Humans may become affected by PCDDs/PCDFs and PCBs through environmental (soil and water contamination, fish and food), occupational (incinerators; pulp, paper and metallurgy industry; copper production), or accidental (Seveso accident) exposure. The aim of this review was to evaluate environmental hazard caused by PCDDs, PCDFs and dioxin-like-PCBs in the central region of Poland based on the accessible data on diffusion of those compounds in sediments and riverine, reservoir and storm water from our previous studies and discussed in the context of other achievements in Poland and elsewhere.
Źródło:: International Journal of Occupational Medicine and Environmental Health; 2014, 27, 6; 902-918
1232-1087
1896-494X
Pojawia się w:: International Journal of Occupational Medicine and Environmental Health
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Hazardous Organic Pollutants from Open Burning of Municipal Wastes in Southwest Nigeria
Autorzy:: Elehinafe, Francis Boluwaji
Okedere, Oyetunji Babatunde
Ayeni, Augustine Omoniyi
Ajewole, Titus Oluwasuji
Powiązania:: https://bibliotekanauki.pl/articles/2173374.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: VOCs
volatile organic compounds
PAHs
polycyclic aromatic hydrocarbons
PCBs
polychlorinated biphenyls
PCDDs
polychlorinated dibenzo-p-dioxins
PCDF
polychlorinated dibenzofurans
municipal wastes
emission inventory
Opis:: The Southwest Nigeria has witnessed tremendous increase in the output of municipal wastes in the recent years. Non availability of government policy on solid wastes management or its lack of effectiveness where it exists makes unabated open burning the predominant means of municipal solid waste disposal in the region. Open burning of municipal wastes being a major source of anthropogenic air emissions was investigated for atmospheric loading of some hazardous organic pollutants using the emission inventory method. The specific pollutants considered in this study were volatile organic compounds (VOCs), polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), polychlorinated dibenzo –p- dioxin (PCDDs) and polychlorinated dibenzo furan (PCDF). The estimated release of VOCs, PAHs, PCBs, PCDD and PCDF from open burning of municipal wastes in the region over the 5-year period investigated were 64000 tonnes, 988 tonnes, 43 tonnes, 0.56 tonnes and 0.2 tonnes respectively. Given the serious human health implications associated with these hazardous organic pollutants, the study suggested conversion of wastes to energy as a possible solution since the region also faces energy challenges.
Źródło:: Journal of Ecological Engineering; 2022, 23, 9; 288--296
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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