Assignment.....Metals in the Environment, my topic is lead - Case Study Example

Comments (0) Cite this document
Include in your discussion how the metal is transformed and the physiological effects in the body. Explain remediation in individuals.
Lead and its derivatives are the fifth most commonly used metal in…
Download full paperFile format: .doc, available for editing
GRAB THE BEST PAPER97.5% of users find it useful
Case Study Assignment.....Metals in the Environment, my topic is lead
Read TextPreview

Extract of sample "Assignment.....Metals in the Environment, my topic is lead"

1) Explain how the metal or coal bi-product becomes a toxicological problem. Include in your discussion how the metal is transformed and the physiological effects in the body. Explain remediation in individuals.
Lead and its derivatives are the fifth most commonly used metal in the world. It is naturally found in trace quantities. The approximate concentration of lead in the Earth’s crust is 20ppm. The mobilization and transfer of lead is mainly through human means, however, foul weather and volcanic emissions also play their part. A research conducted in the 1960’s concluded that the amount of lead introduced into the environment via human means was 100 times more than that the amount added naturally (Wright A. & Welbourn, 2002). This research proved that lead contamination was one of the hazards brought by industrialization.
The form of lead that is most responsible for lead transmission is tetraethyl lead. Tetraethyl lead is a lead derivative that is used as an additive in gasoline. Other sources of inorganic lead are lead containing sweeteners, lead salts in paints and anticorrosion coats, in batteries, in protective glass that are used against radioactive substances and in insecticide. Lead is also used in water distribution networks and is also used in containers that hold food and drinks. The usage of lead in these sensitive areas can cause mobilization of lead if the liquid medium is soft, acidic or poorly buffered. This translates into lead contamination in drinking water and food and drink vessels. As mentioned afore, paints and anticorrosive agents contain high concentrations of lead. As anticorrosive coats or paints wear off they mobilize particles of lead dust into the air. Lead dust is a direct means of contact with lead particles, and it can also settle in soils or aquatic mediums. Most forms of lead are insoluble. This means that even though practice of using lead derivative compounds in products has ceased, lead and its derivatives are still in the environment.
The dispersal of lead is through three major mediums; the atmosphere, the water and the soil. The dispersal of inorganic lead through the atmosphere is dependent on the particle size of lead. Lead particles having larger size, greater than 2µm in diameter; tend to fall close to their source of origin. They continue to contaminate and pollute the water and soil around the source. Particles which are smaller in size, less than 2µm in diameter; are capable of travelling larger distances. Transference through atmosphere not only depends on particle size, it also depends on wind speed, direction and precipitation. Most lead particles that are generated from industries are larger in size and thus, remain localized to the vicinity of the source.
The atmosphere dispersal method is responsible for deposition of lead particles in soil and water. Lead particles that are deposited into soil or water do not undergo chemical reactions. Lead present in soil does not react or dissolve with the surface or ground water. Further, since lead is pH sensitive the concentration of lead within aquatic bodies never reaches a high concentration. Higher pH of the aquatic body results in higher concentration of dissolved lead. Like other elements, lead also makes its way into food chains. Unlike other elements such as mercury, the concentration of lead within organisms decreases with higher tropic levels. This suggests that lead mobilization thorough the food chain is minimized. It is quite clear that lead particles are immobilized in the soil or aquatic medium; they however are highly mobile in the atmosphere.
The foremost medium of dispersal for lead particles is the atmosphere. Therefore the primary sources of lead particles are industries, old plumbing systems and local anomalies. The main intake of lead is through dietary ingestion of lead. The intake of lead can be through ingestion of food contaminated with load or through lead contaminated water. The third exposure is through mouthing of objects that are contaminated by lead dust or soil. The latter specifically applies to young children. Inhalation of lead particles leads to the same catastrophic effect.
Lead has proven itself to be a poisonous element. Concentrations of lead in the blood stream are known to cause a disease known as Plumbism. Plumbism is characterized by abdominal and joint pain, headache and lethargy. Introduction of lead into the blood stream interferes with the haem system in a number of ways. It causes decreased hemoglobin synthesis, resulting in anemia and paleness. Further, the skeletal system acts as a reservoir for lead. Though accumulation of lead does not have any direct consequences to the skeletal systems, it acts as a means of measure of lead exposure (Luch, 2010). Lead concentrations are also known to cause high blood pressure in adults. Lead exposure in young children causes severe neurological disorders. This includes drastic change in behavior, lowering of IQ and formulation of short attention span.
2) Discuss the one important case study that brings the danger of the metal or coal bi-product to the forefront of environmental concern. Give dates, and a chronological sequence of events.

4,500 hectares in proximity of Agrio and Guadiamar rivers were contaminated by four million cubic meters of acidic water and one million cubic meter of waste comprising of intensive level of toxic compounds which was accidentally discharged from the mine at Aznalcóllar, in the Doñana National Park in Spain, 12 years ago. Pyritic sludge from the mine affected the flora and fauna quite extensively.
Also, on October 4th 2010, the largest ecological disaster in occurred in Hungary. Red mud comprising of toxic materials from aluminium holding pods reached Danube from the Kolontar.
As a result of which ten human lives and destruction of houses and crops was observed.
Nematodes (microscopic soil worms that are indicators of the biological state of soil) from Spanish study showed that the same strategies could be adopted to lower the effects in Hungary as well. Nematodes were effectively utilized in Spain for normalizing the conditions, however it took several years to do so , and the process is still going on. The biologists were of the view that nematodes can significantly reduce the consequences of spillage as they accelerate the cycle of nutrients. Without micro fauna the roots would asphyxiate and do not grow which leads to the decreased agriculture activity and fertility.

Wright, David A. and Pamela Welbourn (2002). Environmental Toxicology. Cambridge University Press, Cambridge, U.K
A. Navas, P. Flores-Romero, S. Sanchez-Moreno, J. A. Camargo, and E. C. McGawley, Effects Of Heavy Metal Soil Pollution On Nematode Communities After The Aznalcollar Mining Spill, Nematropica v40 no 1 Read More
Cite this document
  • APA
  • MLA
(“Case Study Assignment.....Metals in the Environment, my topic is lead”, n.d.)
Case Study Assignment.Metals in the Environment, my topic is lead. Retrieved from
(Case Study Assignment.....Metals in the Environment, My Topic Is Lead)
Case Study Assignment.....Metals in the Environment, My Topic Is Lead.
“Case Study Assignment.....Metals in the Environment, My Topic Is Lead”, n.d.
  • Cited: 0 times
Comments (0)
Click to create a comment or rate a document

CHECK THESE SAMPLES OF Case Study Assignment.....Metals in the Environment, my topic is lead

Hybrid Cars

6 Pages(1500 words)Research Paper

Mechanical testing of metals and polymers

...? MECHANICAL TESTING OF METALS AND POLYMERS By Introduction This report documents the laboratory procedures done on various engineering materials comprising ferrous metal and polymers. The ferrous metal investigated in this study was steel with carbon content in the range of between 0.1% and 0.85%. Conversely, the polymers used in the study are PVC and Polypropylene. The investigation surrounds the argument that the chemical composition of a material has far reaching impact on the mechanical properties of such material. Therefore, the investigation sought to bolster this argument by carrying out a test on mechanical properties of steel and polymers, which include hardness, tensile...
5 Pages(1250 words)Assignment

Mechanical testing of metals and polymers

...? MECHANICAL TESTING OF METALS AND POLYMERS By Introduction The procedure of various engineering properties which include polymers and ferrous metal is contained in this lab report. Steel with a carbon content of that range from 0.1 percent to 0.85 percent is the ferrous metal, and the polymers included the PVC and polypropylene that were under investigation in this experiment. The experiment was because a materials mechanical property is extremely dependent to the materials chemical composition. The experiment was then sought to strengthen the fact by caring out test on steel’s and polymers mechanical properties, which included tensile strength, hardness, impact test, percentage...
5 Pages(1250 words)Assignment

Mechanical testing of metals and polymers

...? Tensile testing of ferrous and non-ferrous metals Introduction Using a hydraulic testing machine provided, adjust the orificeof a pressure-compensated needle valve to control the rate loading. For precise control (in a closed-loop hydraulic servo system), replace the needle valve with an electronically operated servo valve. Mount the specimen in the machine and subject it to tension. The tensile force is recorded as a function of the increase in gage length. Engineering stress or nominal stress, s, is defined as S=F/Ao where F-tensile force and Ao-cross section area of the gage section, while the engineering strain, or nominal strain, e, is defined as e=?L/Lo where Lo is the initial gage length and ?L is the change in...
5 Pages(1250 words)Assignment

Approval of a Topic Diabetes for My Research Project

...A Blue Print for a Research Project Part Topic Approval Initially I had thought focusing my research on another topic, as global warming, but I have already seen so many television programs regarding that subject, that the research would have lost its value and interest. The topic that I have selected for my research project is Diabetes, the reason I have chosen that topic is because I found that Diabetes is the number 5 cause of death in the world. It is my interest to learn more about the disease, its causes, its possible cures and/or alternative treatments. The following is the communication sustained with...
7 Pages(1750 words)Assignment

Pick on topic from my uploaded resources

.... Due to this reason, leading oil exporting countries have taken the market completely and are running the market according to their own terms and conditions. This type of competition in the global oil market has made the prices inflexible. With the fact that the prices of many other things are dependent on the rates of oil which is being obtained from the global oil market, therefore, oil being a complementary good controls the pricing of many other things, as well. In addition to this, it is also observed by economists that an increase in the price of per oil barrel in the global market leads to increase in the general price levels of many developing countries. The global economic recession that hit...
6 Pages(1500 words)Assignment

Marsh's Metals

...Marsh’s Metals Precision Tree Exercise – The Sale (An individual case study report) Dr. Phillip S. Rokicki Qnt. 5040 Weeks Nine and Ten University Name Executive Summary Bob Marsh, the owner of Marsh’s Metals, has acquired 10,000 kilograms of partially refined rhenium ore (Re) for $8,000 per kilogram and estimates that he would be able to sell all the ore for $12,000 or more per kilogram. Bob has two alternatives, sell the 5,000 kilograms rhenium to Fleishman for $13,000 per kilogram or 4,500 kilograms to Huffman for $14,500 per kilogram, and then later sell the remaining ore on the open market for $12,000 per kilogram. The problem is what Bob should do; sell the rhenium to Fleishman or to Huffman, to...
4 Pages(1000 words)Case Study

You will choose a topic for my paper

... Major Cause of the World War II; the Treaty of Versailles The Treaty of Versailles was signed on 28th June 1919 and was aimed at creating peace; the treaty however resulted in the World War II. The treaty negatively affected Germany resulting to their resentment of the Western World. It weakened the German government, took away some portion of Germany territory and distributed it to other countries. It weakened the Germany transport means and also put restrictions on the Germany military. Germany was solely blamed for the World War I and was required to pay for the costs incurred in the war. The German people reacted negatively to the treaty since it would oppress them; they were against their government that had accepted... Major Cause of...
1 Pages(250 words)Assignment

Lead discussion

...scenario outraged the natives because the Euro-Americans saw them as inferior and they started to treat the environment in a way that the natives did not like. Moreover, Indian-Americans were persuaded to give land to Euro-Americans and US government at a low amount by signing a treaty. Therefore, “The Chief Seattle’s of 1854 Oration” is a lamentation speech because the Indian-Americans were given a raw deal. The treaty led to scattering of Native Americans since they surrendered their land to the superior white race. This was believed to extinct most of the natives. Because of this, the chief Seattle tries to persuade the Americans to treat the natives with utmost respect because they were feeling the effects of harsh...
2 Pages(500 words)Assignment

Possible Effects of Environmental Pollution

...religiously stated or implemented or conservatory or liberally discussed and outspoken about, the reason behind the saving of the world from environment pollution becomes of dangerous tasks when the soaring number of people who discuss the world with little or meare indifference to it as being "not my bought home", in financial aspects and monetary wise value, this becomes the main reason why I chose the topic ‘environmental pollution’. I wish to add my contribution to this issue and I want each one including me to be a part and reason why the people on earth and the people yet to come to be comfortable and healthy in both wealth and in manner, not stagnant in either or...
21 Pages(5250 words)Case Study
sponsored ads
We use cookies to create the best experience for you. Keep on browsing if you are OK with that, or find out how to manage cookies.

Let us find you another Case Study on topic Case Study Assignment.....Metals in the Environment, my topic is lead for FREE!

Contact Us