Toxicity of the Workplace Air Contaminant

Provide an overview of the toxicity of the following workplace air contaminants:

1. Diesel Particulate Matter (DPM) (Particulate)

2. Mercury as Hg (vapour)

For each of the two air contaminants, consider sources of exposure, the applicable Occupational Exposure Limits (OELs/ PELs), toxico-kinetics and toxico-dynamics, as shown in the marking scheme. Marks are also allocated for presentation and appropriate referencing, as shown in the marking scheme.

Marking Criteria

Criterion Description Mark
Source of Exposure Provide a summary of occupations/tasks that may present a risk of exposure and sufficient explanation of the processes to show how exposure can occur. Particulate: 2

Vapour: 2

Total: 4

OELs/PELs and notation in Singapore Provide the OELs applicable in Singapore. State if each OEL is long or short term and include any applicable skin or carcinogen notations Particulate: 1

Vapour: 1

Total:2

 

Toxico-Kinetics Provide an outline of how each substance can gain entry to the body, how and where it is distributed, pathways for biotransformation if it is metabolized, sites of accumulation or storage if appropriate, and pathways for its elimination from the body Particulate: 5

Vapour: 5

Total: 10

Toxico-Dynamics Provide a brief description of how each substance (or its metabolite) can interact with cells and tissues to cause harm (mechanism of harm). Include a summary of the resulting health effects. Particulate: 5

Vapour: 5

Total: 10

Presentation and Referencing Prepare the assignment using formal English and appropriate sub-headings. Research the information an authoritative text and electronic resources, both in the library and on the internet, and reference appropriately. No specific referencing style is stipulated, but be consistent and ensure that the appropriate forms for ‘in text’ citation and end listing of references are used. Presentation: 2

References: 2

Total: 4

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