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2. Persistent, bioaccumulative and toxic substances - Wikipedia

   en.wikipedia.org/wiki/Persistent,_bio...

   Persistent, bioaccumulative and toxic substances (PBTs) are a class of compounds that have high resistance to degradation from abiotic and biotic factors, high mobility in the environment and high toxicity. Because of these factors PBTs have been observed to have a high order of bioaccumulation and biomagnification, very long retention times in ...

3. Persistent organic pollutant - Wikipedia

   en.wikipedia.org/wiki/Persistent_organic_pollutant

   Polychlorinated biphenyls (PCBs), used as heat exchange fluids, in electrical transformers, and capacitors, and as additives in paint, carbonless copy paper, and plastics. Persistence varies with degree of halogenation, an estimated half-life of 10 years. PCBs are toxic to fish at high doses, and associated with spawning failure at low doses.

4. Toxic equivalency factor - Wikipedia

   en.wikipedia.org/wiki/Toxic_Equivalency_Factor

   Toxic equivalency factor (TEF) expresses the toxicity of dioxins, furans and PCBs in terms of the most toxic form of dioxin, 2,3,7,8-TCDD. [1] The toxicity of the individual congeners may vary by orders of magnitude. With the TEFs, the toxicity of a mixture of dioxins and dioxin-like compounds can be expressed in a single number – the toxic ...

5. Texas Commission on Environmental Quality - Wikipedia

   en.wikipedia.org/wiki/Texas_Commission_on...

   Sunset legislation passed by the Texas Legislature in 2001 changed the agency's name to the Texas Commission on Environmental Quality and continued the agency until 2013. During the special session of the 81st Legislature (2009), legislation was adopted amending the 2013 date to 2011, [ 4 ] when the agency was continued for an additional 12 ...

6. These common chemicals could affect your health all over your ...

   www.aol.com/news/pfas-chemicals-everywhere-could...

   These common chemicals could affect your health all over your body, expert says. Madeline Holcombe, CNN. September 9, 2024 at 9:52 AM. There are chemicals in cookware, food, water, clothes and ...

7. Toxic Substances Control Act of 1976 - Wikipedia

   en.wikipedia.org/wiki/Toxic_Substances_Control...

   The Toxic Substances Control Act (TSCA) is a United States law, passed by the 94th United States Congress in 1976 and administered by the United States Environmental Protection Agency (EPA), that regulates chemicals not regulated by other U.S. federal statutes, [1] including chemicals already in commerce and the introduction of new chemicals.

8. Ecotoxicology - Wikipedia

   en.wikipedia.org/wiki/Ecotoxicology

   Ecotoxicology. Ecotoxicology is the study of the effects of toxic chemicals on biological organisms, especially at the population, community, ecosystem, and biosphere levels. Ecotoxicology is a multidisciplinary field, which integrates toxicology and ecology. The ultimate goal of ecotoxicology is to reveal and predict the effects of pollution ...

9. Polychlorinated biphenyl - Wikipedia

   en.wikipedia.org/wiki/Polychlorinated_biphenyl

   Polychlorinated biphenyls (PCBs) are organochlorine compounds with the formula C 12 H 10−x Cl x; they were once widely used in the manufacture of carbonless copy paper, as heat transfer fluids, and as dielectric and coolant fluids for electrical equipment. [2] They are highly toxic and carcinogenic chemical compounds, formerly used in ...