Lead is a heavy, low melting, bluish-gray metal that is found naturally in the Earth's crust.Before 3000 B.C. the Egyptians used lead in glaze pottery while ancient romans used this metal for two purposes:
• To join the water pipes
• To flavor wines and food (
Though, it is scarcely found naturally as a metal but combined with two or moreother elements to form lead compounds mainly in the ores Galena (PbS), Cerussite(PbCO3), and Anglesite(PbSO4) (Infoplease, 2012).
Metallic lead is resilient to corrosion thatit cannot be easily attacked by air or water. A thin film is formed whenexposed toair or water that shields the metal from more attack.Lead can easily be molded and shaped and can be combined with other metals to form alloys. The metal
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It is a cumulative toxicant that damages neurological, hematological, gastrointestinal, cardiovascular and renal systems. When exposed to lead, neurotoxic effects have been observed particularly in children and even low levels of exposure can cause severe and, in some cases, permanent neurological damage. About 0.6% of the diseases around the world are due to the lead exposure and this rate is highest in developing regions. Albeit there is low level of lead found in blood due to the diminutions in the use of this metal in products in recent years. Still the significant sources of lead are there especially in developing countries. Thus efforts are required in the reduction of use and release of lead so that environmental and occupational hazards can be avoided (WHO, …show more content…
The workers that work in industries are at high risk level of exposure of lead during the grinding, welding and cutting of materials painted with lead-containingpaints. Mining, smelting, and informal processing andrecycling of electric and electronic waste can also be significant sources of exposure. Leadhas been used widely in the form of tetraethyl and tetramethyl lead as antiknock andlubricating agents in petrol.
II. Food and smoking
Smokers have a high content of lead. On the other hand, non-smokers intake lead from dust, dirt and food. The soil present near mines and smelters have high concentration of lead and thus food plants that grow in such type of soil has automatically high levels of lead. The plants may include cereals like rice, wheat etc. and spices may be polluted or coated with lead. The usage of cans that are made of lead are also the source of this metal in food and beverages. As acidic media dissolves a large amount of lead easily so the alcoholic drinks have very high levels of lead in them.
III.
This is why the Flint water crisis is so critical today. Because young children are being exposed to lead and they should actually be screened from the lead. The pipelines with lead in the water system and the whole community of Flint, not being able to drink water out of the facet as well as not being able to
The lead got into the water because the city started using the Flint River until they could get it from somewhere else, and the pipes had lead in them, but they didn't fix them in order to save money because it was temporary. While the water was passing through the pipes the lead came off and got into the water.
Lead is a metal found virtually everywhere even today. Sources of lead include auto body shops, electric storage batteries, glazes for china dishes, crockery, insecticides, electric cable insulation, hose, pipe, sheet and floor coverings. Lead is associated with stain glass work, jewelry making and antique ceramic doll painting. Although lead in paint was outlawed, there are still many homes that have lead paint (White et al, 1990). Lead found in gasoline was found in one study to account for 23--27% of the lead blood levels in the people tested (Wagner, 1991). This exposure to lead sources is more of a concern for children due to the characteristic habit of children to taste everything they touch; this characteristic is known as pica. Children are also in closer contact with their lead polluted environment during play. They are more active and exposed to outdoor contaminates and they inhale dust and dirt that are lead contaminated. Furthermore, the adsorption rate of lead in the digestive tract is up to 10 times greater in chil...
When lead enters the environment, it starts to become a problem. After a period of about ten days, depending on the weather, it falls to the surface. Here lead builds up in the soil particles. Where it may make its way into underground water or drinking water due to the fact the grounds acidic or if it's soft enough. Either way it stays a long time on the soil or in water. Months or years down the road after the lead has built up it starts to become a problem for children that play outside of their homes . This lead containing soil particles get on the child's hands or clothing and end up in the child's mouth. After the build up of so much lead it leads to lead poison. Lead poisoning has been an issue since the early 1900s, when the use of lead started being banned from the manufacturing of paint in foreign countries such as Australia. Unfortunately, the United States did not start banning it until 1978, when it finally became illegal in our nation. Today 90% of the lead in the atmosphere comes from the burning of gasoline. This problem has been a large issue since the 1920s, when the Environmental Protection Agency started making laws on the amount of lead allowed in gasoline.
lead are more prone to developing ADHD. Some scientists in Brittan have linked a higher
Lead is slightly hazardous in case of skin contact (irritant), of ingestion, and of inhalation. May also cause damage to the following organs: blood, kidneys, central nervous system
Lead toxicity has been an area of unending research in recent years. There have been positive and negative correlation’s relating its toxic effects to both child developmental deficiencies and adult regression problems. This review will focus on the problems associated with the children. It will discuss various routes of entry of lead into the child’s system, both prenatally and postnatally, the mechanisms employed by lead to cause the dysfunction’s, and some of the neurological deficits believed to be caused by the lead exposure.
Lead is usually used in cell phone screens, circuit boards and the buttons.Lead is commonly used as a stabilizer in products and for pigment in paint, rubber, plastics, and ceramics. Lead's chemical properties also make it easy to use in metal products.
There are differences in the primary routes of exposure, Babies and children can swallow lead through breast feeding. They can be exposed to lead in the womb if their mothers have lead in their bodies. In children ingestion is the major route of exposure. Lead paint is the major source. In older houses as the lead paint deteriorates, peels, chips or is...
Lead has become both a blessing and a curse to the population. It has provided us with many tools in order to help us live but it has caused lots of health related incidents. People who have been exposed to lead products within their environment risk the chance of having developmental problems along with causing organs within the body to become infected. Young children are especially vulnerable to the effects of lead because they absorb as much as 5 times more ingested lead than adults. They can suffer
Television has affected every aspect of life in society, radically changing the way individuals live and interact with the world. However, change is not always for the better, especially the influence of television on political campaigns towards presidency. Since the 1960s, presidential elections in the United States were greatly impacted by television, yet the impact has not been positive. Television allowed the public to have more access to information and gained reassurance to which candidate they chose to vote for. However, the media failed to recognize the importance of elections. Candidates became image based rather than issue based using a “celebrity system” to concern the public with subjects regarding debates (Hart and Trice). Due to “hyperfamiliarity” television turned numerous people away from being interested in debates between candidates (Hart and Trice). Although television had the ability to reach a greater number of people than it did before the Nixon/Kennedy debate, it shortened the attention span of the public, which made the overall process of elections unfair, due to the emphasis on image rather than issue.
Despite the world being full of diverse people with varying accomplishments and skill sets, people oftentimes assume the qualities and traits of an individual based purely on the stereotypes set forth by society. Although these stereotypes are unavoidable, an individual can be liberated, empowered and ultimately overcome these stereotypes by obtaining an advanced education.
Around 3000 BC , silver was mined from lead ores in Turkey and Greece, where it was used for jewelry and a form of money.16 Once taken from the earth, the lead ores were smelted to purify the silver and were heated to separate other metals from the silver. Today, the largest silver mines are located in Mexico, Guatemala, and Russia.17 These mines harvest ores with lead, copper, and zinc being major components and silver being a minor component. Silver is highly valued for its anti-bacterial properties, its highly reflective nature in photograph development, and in mirror and dental alloy production.
Huddie William Ledbetter also known as "Leadbelly" was an American folk singer and blues musical, most famous for his strong prominent vocals and his ability to play thetwelve-string guitar. Leadbellys astounding ability to play the guitar combined with his personal life experiences provided the foundation for his musical career. He also wrote about mainstream culture and black culture in general to express feelings of anger, sadness, and expose the wrongdoings of American society against blacks.