نتایج جستجو برای: pcdd
تعداد نتایج: 702 فیلتر نتایج به سال:
The major objective of this study was to evaluate the human health risks of agricultural land use conversion to other purposes in Hong Kong, based on the levels of polychlorinated dibenzo-p-dioxin and polychlorinated dibenzofuran (PCDD/Fs) and determined dioxin-like activity in soil using ethoxyresorufin-O-deethylase (EROD) bioassay. Hazard quotient showed soils of open burning site (OBS) and e...
The aim of the present work was to assess the emission of different persistent organic pollutants from a cement plant over a period of one year, under normal operational conditions. Thus, a long-term sampling device was installed in the clinker kiln stack of the cement plant. The factory uses petroleum coke as primary fuel, but also alternative fuels such as solid recovered fuel (SRF), automoti...
OBJECTIVES Dioxins and PCBs are highly toxic and persistent environmental pollutants that are measurable in humans worldwide. These persistent organic pollutants are associated with a higher incidence of diabetes mellitus. We hypothesise that perinatal (background) exposure to industrial pollutants like dioxins also influences body mass development and energy metabolism in later life. STUDY D...
Lake D is located in the south of China. The total area of the lake is about 3,000 km. The dimension of the lakeland varies greatly with changing of seasons. It is an important source of grain and freshwater fish in China. However schistosomiasis japonica prevailed in this region for a long time, sodium pentachlorophenate(Na-PCP) has been sprayed since the 1960s to control the spreading of snai...
One hundred ninety-two workers in a German pesticide factory who were exposed to polychlorinated dibenzodioxins and -furans (PCDD/PCDF) were investigated for former and present diseases and laboratory changes of the immune system. Moreover, in a subgroup of 29 highly exposed and 28 control persons, proliferation studies were performed. In addition to assays such as blood count, immunoglobulins,...
In this paper the polychlorinated-dibenzo dioxins and furans (PCDD/Fs) release is analyzed during an hydrothermal carbonization process of the organic fraction of municipal solid waste (OFMSW). Two models to estimate the quantity of PCDD/Fs that can be released during this kind of process are presented in this paper. The first model follows a mass balance approach; the second one develops a phe...
quantum chemical calculations, based on density functional theory (dft) method, were performed on calix[4]arene and polychlorinated dibenzo-p-dioxins (pcdds) in gas and liquid phases for comparison purposes. the simulation results show the 1,2,3,4, 6,7,8,9-octachlorodibenzo-p-dioxin (ocdd) is quite a reactive dioxin. this paper attempts to examine the possibility of dioxin adsorption by calix[n...
The effects of eighteen precipitation (rain and snow) events in both Jinan Qingdao cities Shandong Province, China, on the air quality dry deposition flux PCDD/Fs were investigated. A total fifteen positive for AQI reductions. In these events, ranged between 29 195 averaged 79, PM2.5 concentration 10 146 µg m–3 39 m–3. comparison average during after precipitation, respectively, with that befor...
The effects of 9 precipitation events in Suzhou City Anhui Province, China, on the air quality index (AQI), PM2.5, and dry deposition flux PCDD/Fs (polydibenzo-p-dioxins polydibenzofurans) were investigated. A total 7 positive contributes to reduction AQI; among them, AQI between 23 216, with an average 75, PM2.5 concentrations 5.0 169 µg m–3, 25 while total- PCDD/F-TEQ ranged from 149 1034 pg ...
Releases of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/PCDFs) from industrial or thermal processes to the aquatic environment are considered small compared emissions air today. However, have occasionally released PCDD/PCDFs into local environments. . PCDD/PCDF formation releases were re-examined based on investigations conducted before introduction water quality regulations in Ja...
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