Here's why:
* Acids actually promote the formation of SO2: Acids can react with sulfides and sulfites, releasing SO2 as a byproduct. This would worsen the problem, not solve it.
* SO2 removal requires alkaline conditions: The most common methods for removing SO2 from waste gases involve using alkaline solutions or solids, such as:
* Wet scrubbing: This process uses a slurry of lime or other alkaline materials to react with SO2, forming sulfites or sulfates that are removed from the gas stream.
* Dry scrubbing: This method uses dry alkaline materials like limestone or sodium bicarbonate to absorb SO2.
* Flue gas desulfurization (FGD): This is a broader term encompassing both wet and dry scrubbing processes.
Therefore, using acids to treat waste gases would be counterproductive for SO2 removal.
