scroll to top
Stuck on your essay?
Get ideas from this essay and see how your work stacks up
Word Count: 1,250
Cadmium and sewage sludge This essay concentrates on the heavy metal cadmium and its occurrence in the environment its pathways into and out of the human body and its movement into and out of Sewage sludge Firstly I will provide a clear definition of the Heavy Metal Cadmium What is Cadmium Cadmium is a naturally occurring element in the earths crust Pure cadmium is a soft silver-white metal but this form is not common in the environment Rather cadmium is most often encountered in combination with other elements such as oxygen cadmium oxide chlorine cadmium chloride or sulphur cadmium sulphide These compounds are all stable solids that do not evaporate although cadmium oxide is often found as part of small particles present in air Most cadmium is obtained as a by-product from the smelting of zinc lead or copper ores Cadmium has a number of industrial applications but it is used mostly in metal plating pigments batteries and plastics Cadmium in the Environment Small quantities of cadmium occur naturally in air water soil and food For most people food is the primary source of cadmium exposure since food materials tend to take up and retain cadmium For example plants take up cadmium from soil fish take up cadmium from water and so on It is introduced into the environment from mining and smelting operations Other cadmium emissions are from fossil fuel use fertilizer application sewage sludge disposal or galvanized pie corrosion The largest source of these cadmium releases into the general environment is the burning of fossil fuels such as coal or oil or the incineration of waste materials Cadmium may also escape into the air from zinc lead or copper smelters Working in or living close to a major source of airborne emissions such as these may result in higher than average exposure Pathways into the human body Food and Drink Cadmium can enter the blood by absorption from the stomach or intestines
@Kibin is a lifesaver for my essay right now!!
- Sandra Slivka, student @ UC Berkeley
Wow, this is the best essay help I've ever received!
- Camvu Pham, student @ U of M
If I'd known about @Kibin in college, I would have gotten much more sleep
- Jen Soust, alumni @ UCLA