Multiple Choice
Which chemical are all phenolic chemicals a derivative of?
11. Controlling Microbial Growth
Other Types of Liquid Chemicals
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Heavy metals are no longer used to prevent microbial growth in cooling water primarily because:
A
Antibiotics are cheaper.
B
Other chemicals were shown to be much more effective.
C
Microbes developed resistance to these metals.
D
Their use contributes to serious pollution of natural waters.
Verified step by step guidance1
Understand the context: Heavy metals were historically used to prevent microbial growth in various settings, including cooling water systems.
Consider the environmental impact: Heavy metals can accumulate in natural water bodies, leading to pollution and potential harm to aquatic life and ecosystems.
Evaluate the alternatives: Other chemicals and methods have been developed that are more effective and environmentally friendly for controlling microbial growth.
Assess microbial resistance: While microbes can develop resistance to heavy metals, this is not the primary reason for their discontinued use in cooling water.
Conclude with the main reason: The primary reason heavy metals are no longer used is due to their contribution to serious pollution of natural waters, which poses significant environmental and health risks.
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