Why is there a concern about copper smelting plants? 1. They may release lethal quantities of carbon monoxide into environment. 2. The copper slag can cause the leaching of some heavy metals into environment. 3. They may release sulphur dioxide as a pollutant. Select the correct answer using the codes given below.

QUESTION

Hard

Environment & Ecology

Prelims 2021

Why is there a concern about copper smelting plants?

They may release lethal quantities of carbon monoxide into environment.
The copper slag can cause the leaching of some heavy metals into environment.
They may release sulphur dioxide as a pollutant.

Select the correct answer using the codes given below.

Select an option to attempt

Explanation

Statement 1 is Incorrect: While some carbon monoxide might be produced during the smelting process, it's unlikely to be in lethal quantities with proper emission controls.

Statement 2 is Correct: Copper slag, a byproduct of the smelting process, can contain heavy metals like lead, arsenic, and cadmium. Rainwater or acidic runoff can leach these metals from the slag, contaminating soil and water resources.

Statement 3 is Correct: Sulphur dioxide (SO2) is a major pollutant released during copper smelting, primarily from the burning of sulfur-containing fossil fuels used in the process. SO2 emissions contribute to acid rain and air pollution.

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