January 28, 2014 - Counting around the carbon rings, those with chlorines at positions 2, 3, 7, and 8 are toxic (see figure 1). The dioxin-like PCBs have both biphenyl rings in the same plane (flat appearance), which allows them to act like dioxins in the body. PCDDs and PCDFs are not created intentionally but are produced as a result of human activities like the backyard burning ...

October 16, 2024 - In addition to dioxins, other harmful ... biomass is burned in low oxygen conditions. Using plastic, particularly chlorine-containing plastics such as polyvinyl chloride, as a fuel or firestarter further increases dioxin emissions....

The combustion of carbonaceous fuels results in the emission of the products of incomplete combustion, which include PCDD and PCDF (dioxins). The term dioxins is popularly used to describe a class of chlorinated compounds, which is correctly known as polychlorinated dibenzo-p-dioxins (PCDD) ...

Dioxin is produced when chlorinated compounds like vinyl (PVC) are burned, which is one argument against use of municipal incinerators for solid waste. It is also produced whenever groundwood pulp is bleached with chlorine, as it is in nearly every kraft mill.

November 29, 2023 - They are unwanted by-products of ... chlorine bleaching of paper pulp and the manufacture of some herbicides and pesticides. Uncontrolled waste incinerators (solid waste and hospital waste) are often the worst culprits of environmental release due to incomplete burning. Technology is available that allows for controlled waste incineration with low dioxin ...

Backyard burning is of particular health concern because it produces significant quantities of dioxins. Dioxins and "dioxin like" compounds are a group of 30 highly toxic chlorinated organic chemicals. They are produced naturally in small quantities, but are primarily the result of human activity.

There is poor correlation between total chlorine in waste streams and formation of polychlorinated dibenzodioxin and polychlorinated dibenzofuran (PCD…

Dioxins are a group of chemicals that form as unwanted byproducts from incomplete burning of household and industrial waste. They also can be produced during bleaching of paper pulp and the manufacture of certain chlorinated chemicals like polychlorinated biphenyls (PCBs), chlorinated phenols, ...

September 1, 1996 - The U.S. Department of Energy's Office of Scientific and Technical Information

Estimates of polychlorinated ... releases (Gullett et al., 2001; Wunderli et al., 2000). DLCs are formed in chemical reactions that occur during the combustion of organic compounds in the presence of chlorinated ......

What are dioxins and where are they found? Dioxins are a group of chemicals that form as unwanted byproducts from incomplete burning of household and industrial waste. They also can be produced during bleaching of paper pulp and the manufacture of certain chlorinated chemicals like polychlorinated ...

Dioxin is a general name for a large group of chemical compounds with similar structure. These compounds are made up of carbon, oxygen, hydrogen and chlorine atoms. The number of the chlorine atoms and their positions in the dioxin molecule are what determines the toxicity of different dioxins.

June 18, 2024 - There is also concern that the burning of vinyl chloride could lead to the formation of dioxins, which are created from burning chlorinated carbon materials.

The Basel Convention is a multilateral environmental agreement. Its aim is to protect human health and the environment against the adverse effects of hazardous wastes and other wastes based on their origin and/or composition and their characteristics.

During WWII, organic products were introduced; for example, plastics became an important part of the chemical industry. Some of these products were organochlorine based, and in fact, some of them were chlorinated phenols. As waste materials containing these chemicals were burned, dioxins and furans ...

CDDs are a family of 75 chemically related compounds commonly known as chlorinated dioxins. One of these compounds is called 2,3,7,8-TCDD. It is one of the most toxic of the CDDs and is the one most studied. In the pure form, CDDs are crystals or colorless solids.

September 8, 2024 - Dioxins are produced in small concentrations when organic material is burned in the presence of chlorine, whether the chlorine is present as chloride ions or as organochlorine compounds, so they are widely produced in many contexts.

April 19, 2019 - Dioxins are a family of chemicals often formed by the combustion of chlorine containing materials. Although global dioxin levels have declined since the 70's, PVC production has increased.

These samples were also incinerated ... and pentachlorophenol) to investigate the role of chlorine content and/or the presence of different metals in dioxin formation. Some samples, such as newspapers, were burned after they were impregnated with NaCl or PVC, as well as being ...