Dioxins in the environment: a review of trend data

Article Abstract:

Industrial countries which have been active in polychlorinated dibenzo-p-dioxins (PCDDs) and dibenzofurans (PCDFs) monitoring and research, especially the US, Germany, Sweden, Germany and the UK, are the focus in a comprehensive review of available PCDD/F time trend data. Data on temporal trends are derived from the analysis of dateable deposits, retrospective analysis of preserved or archived samples and current monitoring programs. A review of data on changes in air concentrations, deposition, sediments, soil, biota, food and human tissues is also conducted. Comprehensive monitoring programs are urged to affirm the interpretation of past changes and forecasted declines.

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Evidence for the presence of PCDD/Fs in the environment prior to 1900 and further studies on their temporal trends

Article Abstract:

A study investigates the presence of polychlorinated dibenzo-p-dioxins (PCDDs) and dibenzo-furans in the environment prior to 1900. A previously unopened bottle of soil collected in 1881 yielded sufficient amount of PCDDs at 0.7 ng of sigmaTEQ/kg soil. Modern soil sample taken from the same spot reveal that PCDD concentration have increased to 1.4 ng of sigmaTEQ/kg.

Research and Development in the Physical, Engineering, and Life Sciences, Pollution Control R&D, England, Pollution control research, Soil absorption and adsorption, Absorption, Soil science

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Temporal changes in purity and specific activity of tritium-labeled 2,3,7,8-tetrachlorodibenzo-p-dioxin: radiopurity model for toxicology

Article Abstract:

Reactions associated with radiolysis and tritium decay are examined in order to predict changes of radiopurity and specific activity in tissues and solutions.

United States, Science & research, All Other Basic Inorganic Chemical Manufacturing, CHEMICALS AND ALLIED PRODUCTS, Pollutants produced & recycled, Isotopes, Statistical Data Included, Toxicology, Tritium

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