DIOXIN AND HUMAN HEALTH Introduction The major pollutants of the environment are as a result of unwanted by-products of thermal processes, namely polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/PCDF). The paper industry, chlorine industry, herbicide industry, car-trafficking, melting processes yield PCDD/PCDF…
The producibility is relatively high in presence of a catalyst like iron. Chemistry of Dioxins Para-dibenzodioxins are formed when two oxygens combines two benzenes (or chlorinated benzenes). The number of isomers is several as both could have upto 8 chlorines – 75 for PCCDs and 135 for PCDFs. These compounds are called as congeners. Toxicity is expressed as Toxic Equivalent Factor (TEF) and toxicity is based on 2,3,7,8 TCCD which is expressed as TEF. The toxicity is caused because of the four chlorine atoms at positions 2, 3, 7, 8 on the dioxin molecules. The toxicity is expressed as pg TEQ/g lipid (ppt) and is summed up based upon their toxicity equivalent concentrations. OCCD is the most abundant isomer related to human contamination followed by the 2,3,7,8 substituted hepta and hexa-chloro congeners. 2,3,7,8 TCCD is normally less abundant than PCCD. The activation of Ah receptor determines the TEF. The oxygen bond between the two benzenes could be substituted to sulphur or azide. Chlorine could be replaced by bromine. Effect of Dioxins on Human Health Eating, breathing, and polluted air and skin contact with contaminated soil and materials are the major routes for human exposure. The PCCDs reach the blood stream after passing from the gastrointestinal tract and eating food containing the PCCDs. ...
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“Dioxin and Human Health Essay Example | Topics and Well Written Essays - 500 Words”, n.d. https://studentshare.net/other/31138-dioxin-and-human-health.
Unquestionably, most of the foods in groceries, local markets, supermarkets are products of modern industrial processes. Crops are now being grown in large quantities and cheaply, and farmers have been insured from heavy crop losses resulting from pest or disease attack.
This is a voluntary risk. b. The risk of contracting diseases such as cancer from the eating habits. For instance in the state of Washington, the Swinomish tribal Indian community is faced with the risk of consuming chemicals and heavy metals that have been found in the water where shell fish is harvested.
Dioxins are a group of harmful chemical compounds that significantly affect the ecosystem negatively. The justification for a detailed analysis of this chemical compound has been necessitated by the risk factors involved. These factors have been mainly reported in the United States.
As the greenhouse gasses continue to increase through human activity, the temperature of the Earth’s surface will continue to grow. Ecological impact on the human populations will continue to be affected by the aspect of growing heat problems in contrast with a lack of infrastructure that is prepared to handle the impact.
This happens due to the continuous pull of the earth’s gravity. Progressively, communities are enforcing watershed management schemes so that the underground water source can be protected from contamination and
Economic issues are loss in business, power crisis, declining export, war on terrorism, falling stock market and lack of tourism. Causes of some of the socio-economic issues mentioned above are different (Adler & Newman, 2002).
For that reason, the use of PCBs include: they are as coolants and lubricants in transformers and other electrical equipment, they are used as hydraulic fluids, they are also used as plasticizers; PCBs are also used as pigments, dyes and carbonless copy paper
The author highlights the importance of the protection of environment and human health from persistent organic pollutants, preservation and protection of marine environments. He examines different pollutants that are caused by human beings through release of toxic substances and hazardous chemicals into the natural environment.
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