Dioxins concentrations

Table I. Octachlorodibenzo- >-dioxin Concentration before and after Burning Paper and Wood Treated with Pentachlorophenol and Sodium Pentachlorophenate...

Effects of Combustion and Heat. The results of combusting wood and paper treated with pentachlorophenol or sodium pentachlorophenate are shown in Table I. These results indicate that octachlorodibenzo-p-dioxin concentration did not increase as the result of combusting either wood or paper treated with pentachlorophenol. It seems that the concentration of octachlorodibenzo-p-dioxin concentration was actually decreased during combustion. However, paper treated with sodium pentachlorophenate did increase in octachlorodibenzo-p-dioxin concentration as the result of combustion. 

Combustion of wood or paper treated with pentachlorophenol resulted in no increase and more probably a decrease in octachlorodi-benzo-p-dioxin concentrations while octachlorodibenzo-p-dioxin increased slightly in paper treated with sodium pentachlorophenate. The pho-tolytic degradation of sodium pentachlorophenate at pH 8 is very rapid. Under these controlled conditions formation of no more than 0.03% octachlorodibenzo-p-dioxin was observed. The 2,3,7,8 isomer, one of the most active chloracnegens is seemingly stable towards air oxidation but... 

In its Agent Orange exposure study, the CDC identified 600 Vietnam veterans who had been present at times and in areas near where the Air Force s Operation Ranch Hand had sprayed Agent Orange and compared the concentrations of dioxin in the blood lipids (these concentrations are called body burdens ) of those veterans with the concentrations in some 100 other veterans who had never served in Vietnam. The dioxin concentrations in the exposed and nonexposed veterans were the same, and the concentrations in both groups fell within the concentrations measured in the general population.10... 

Dioxins bioaccumulate, which means that animals higher in the food chain tend to have greater concentrations. Most of our exposure to dioxins comes from the food we eat. How many milligrams of dioxins are there in a liter of milk containing a dioxin concentration of 0.16 ppt ... 

Dioxin concentrations in breast milk. Source FY2004 Health and Labour Science Research Grants Studies on Dioxins in Breast... 

Jin et al. (2003a) investigated the dioxin concentrations in the breast milk of 79 first-time mothers in Shengyang and Dalian, Liaoning Province, by... 

Gras, J., Muller, J., 2004. Dioxins in ambient air in Australia, Technical Report No 4. Appendix F—Summary of published dioxins concentrations. Department of the Environment and Heritage, Australian Government. 

Not identified A. Ahlstroem Osakeyhtioe, Karhula, Finland Processing and Flue Gases and Ashes from CFB Combustion of Municipal Waste to Control Dioxine Concentrations Ministry of Trade and Industry, Helsinki (Finland)... 

Pluim HJ, Boersma ER, Kramer I, et al. 1994c. Influence of short-term dietary measures on dioxin concentrations in human milk. Environ Health Perspect 102 968-971. 

Mayani A, Barel S, Soback S, Almagor M (1997) Dioxin concentrations in women with endometriosis. Hum Reprod, 12 373-375. 

In the Times Beach incident, a waste oil dealer removed about 20,000 gal of oil contaminated by 30 ppm of 2,3,7,8-tctrachlorodibcnzo-p-dioxin from a hexachlorophene manufacturing plant, (a) What mass of dioxin was involved (b) Some of this oil was sprayed in horse arenas, and in some spots in these arenas, the soil dioxin concentration was about 2000 ppb. What mass of this soil needed to be ingested by a 100 g guinea pig to reach the LD50 of 0.6 pg/kg ... 

Schecter A, Papke O, Ball M, et al. Dioxin concentrations in the blood ofwork-ers at municipal waste incinerators. Occup Environ Med 1995 52(6) 385-7. 

Maruyama, W., Yoshida, K., Tanaka, T. and Nakanishi, J. (2002) Determination of tissue-blood partition coefficients for a physiological model for humans, and estimation of dioxin concentration in tissues. Chemosphere, 46 (7), 975-985. 

DENOX-SCR catalysts can drastically reduce the dioxine and furane content of exhaust gases of waste incineration plants, far below the limits prescribed by law (0.1 ng m" ). The dioxine concentration in the emission of a DENOX-equipped waste incineration plant is 100 times lower than the concentration in nonincinerated waste. 

Average dioxin concentration in particuiate sampie - 113.5 ppb Standard devia on - 25.9 ppb... 

Concentration and Dioxin Concentration At One Ambient Air Sampling Site... 

In 1987, researchers from the Center for Disease Control in Atlanta (USA), updated a methodology to assess dioxin concentration in the serum. Serum sample frozen at -20°C in 1976 were analyzed and results confirmed the high exposure of inhabitants, especially in the A zone, with sometimes extremely high TCDD concentrations. 

Uptake continued for 28 days with the dioxin concentration in the water kept constant during that time. After 28 days, the trout were transferred to clean water, and the loss of the toxic substances from the trout was followed for a further 28 days. For this toxicant, k-i was essentially zero (very slow metabolism), and from these data, it is possible to determine the rate constants k and kz and the BCF. The valnes, to one significant figure, were/ i = 200day and fca = 0.1 day, leading toBCF=li,/lt2 = 2000. 

Tab. 9.2-1 Dioxin concentrations in different feed-stuffs (SCAN 2000)... 

In some locations in Japan, dioxin concentrations exceed the environmental standard set for Japan (< 1000 pg-TEQ/g soil) (Table I). These areas are the sites of chemical plants and industrial-waste incinerators. U sually, the soils from these sites were excavated and sequestered. 

Klein HO, Lang R, Weiss E, Di S ni E, Libhaber C, Guerrero J, Kaplinsky E. The influence of verq)amil onserum dioxin concentration. Circulation (1982) 65,998-1003. 

Paladino JA, Davidson KH, McCaU BB. Influence of ironolactone on serum dioxin concentration. JAMA (1984) 251, 470-1. 

The content of moisture or lipid in biological samples, and of organic carbon in soil or sludge, can account for variations in dioxin concentrations measured between samples. Therefore, normalization of concentrations on dry and/or lipid weight or organic carbon would improve the comparability of concentrations across samples. 

The concentration of dioxins in the slag is greatly reduced compared with the dioxins concentration in the fly ash. In a typical case more than 98% of dioxins are decomposed by plasma melting. In terms of TEQ (Toxic Equivalent Quantity), the dioxins concentration is only 0.01 ng (Table 2. ). 

S.A. Dinkins. Quantification of dioxin concentrations in the Ohio River using high volume water sampling. Available online at http //tinyurl.com/9valj. 

In 1984, the Ministry of Health, Japan, announced that the influence of dioxin on humans is lOOpg/kg weight/day using 2,3,7,8-TCDD as a representative example. Six years later, the Japan Federation of Paper Industries reported the results of the analysis of dioxin concentration of pulp and paper. Judging from these values, it became clear that the concentration of dioxin in pulp and paper products is extremely small (see Table 17). 

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