Concentrations of polychlorinated dibenzo-p-dioxins (dioxins)(PCDDs) and polychlorinated dibenzofurans (PCDFs)(furans) in sediments from Port Jackson ranged from 32 to 4352 pg WHO-TEQ DF g(-1)dw with a mean of 712 pg g(-1)dw. Maximum total dioxins plus furans concentrations in this sediment was 6,290,000 pg g(-1)dw, which is the highest recorded in Australia and among the highest reported for s...

Several investigations on the extraction of dioxins from soil and fly ash with supercritical fluid have been reported; however, few of them describe the influence of components on the extraction. We extracted dioxins from eight samples with different values of organic carbon content and surface area with supercritical CO(2) at a temperature of 463 K, a pressure of 40 MPa, and using 10% toluene ...

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...

Despite legal regulations limiting emissions of persistent organic pollutants (POPs), including dioxins, to the environment, they still constitute a significant component of environmental contamination. They are released in large amounts during various processes of combustion in industry, the management of refuse materials and also as a result of situations that are partially beyond our control...

It is nearly impossible to totally avoid contact with polychlorinated biphenyls (PCBs) and dioxins, ubiquitous pollutants that are produced by the electrical, plastics, pesticide, paper, and other industries. These fat-soluble toxicants accumulate in the food chain, especially in meat, fish, and dairy products. Mothers pass PCBs and dioxins to their children through the umbilical cord and breas...

On the basis of the congener-specific analysis of dioxins in a dated sediment core, surface sediment, and soil samples, the sources and mass balance of dioxins in Tokyo Bay basin, Japan, were estimated. The dioxins in the sediment core showed that their deposition in the bay increased rapidly during the 1960s, peaked in the early 1970s and then decreased gradually. Principal component analysis ...

CONTEXT For the general population, the dominant source of exposure to dioxin-like compounds is food. As part of the University of Michigan Dioxin Exposure Study (UMDES), we measured selected polychlorinated dibenzo-p-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs), and dioxin-like polychlorinated biphenyls (PCBs) in serum of 946 subjects who were a representative sample of the general p...

all people need food. unsafe foods; however, may cause diseases ranging from diarrhea to cancer. chemicals in food are a worldwide health concern. in 2006, the world health organization (who) organized a consultation on the global burden of foodborne diseases. work to estimate this burden began in 2007 and was carried out by the who foodborne disease burden epidemiology reference group (ferg), ...