Role of an Environmental Chemist - Science Assignment Help

Assignment Task

Task

The Issue:

Whenever a large number of people concentrate in one area, it is inevitable that some of their waste contaminates local sources of water. Industries also add pollutants to water. The challenge is to keep the contamination to a minimum because once the water is contaminated it is difficult and expensive to treat. Water contaminants can be classified as being physical, biological, or chemical. Note that physical and biological contaminants are not in solution. Rather, they form heterogeneous mixtures with water. Conventional water treatment processes remove most of the contaminants from drinking water. Activated carbon filters, for example, remove some medications and organic contaminants. Some biological pollutants are destroyed when water is chlorinated. But because there is such a broad range of pollutants in drinking water, no single treatment option could eliminate all of them.

For this Project:

• You will take the role of an environmental chemist trying to suggest a water purification system in your school (design your filtration system and represent your idea in a creative way ) 

Purpose

• To suggest a procedure to improve the quality of drinking water in your school

Apply and extend:

Most places in Canada have safe, high-quality tap water. But not all tap water is created equal. That is why the tap water may taste or feel different from region to region. The composition of tap water depends on where the water comes from (such as a lake or aquifer) and what it dissolved on the way to your tap. It also depends on how the water is treated. Water treatment can be as simple as adding disinfection tablets to a bottle of lake water on a camping trip, or as complex as the process at a municipal water treatment plant. The ultimate goal of water treatment is not to purify water but to make the water potable, or safe to drink. This means removing or reducing the substances in water so that they no longer pose a threat to public health. Treatment also involves ensuring that the water has an appropriate taste, colour, and odour. People in rural areas likely get their drinking water directly from a nearby well. The well’s owner is responsible for testing the water to ensure that it is potable. The residents of an urban area usually get their water from a municipal or regional water authority. This water is processed in several steps to ensure that it is potable. A large municipality treats and pumps vast quantities of water each day. For example, the City of Toronto produces about 1300 ML per day—more than enough to fill a major sports stadium. Processing and pumping this much water uses a lot of energy. Water treatment is therefore one of the largest energy costs of any municipality. 

Assessment Task:

Criteria

• Demonstrate an understanding of methods of water purification

• Demonstrate how the presence of different types of water contaminants as physical, chemical and biological contaminants will change the properties of water.

• Plan safe and effective procedures for the water purification.

• Conduct the procedures safely and effectively.

• Record all observations carefully and in an organized manner.

• Analyze the results.

• Evaluate the procedure.

• Prepare a project sheet for a complete water purification system that includes the complete procedures, summary of the observations, any necessary analysis, and evaluation.

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