Why is the carbonate content of drainage material limited in landfill leachate systems?

Limiting the carbonate content in drainage material within landfill leachate systems is crucial due to the potential for carbonate minerals to dissolve over time. When carbonate minerals dissolve, they can contribute to pH changes in the leachate, leading to adverse chemical interactions. This dissolution can also impact the overall stability of the landfill environment and potentially disrupt the intended management processes of leachate.

Additionally, the dissolution of carbonates can result in reactions that might release additional contaminants into the leachate or affect the efficacy of treatment systems designed to neutralize acidic components. Therefore, controlling carbonate levels helps maintain the chemical balance within the leachate and supports effective landfill operations while minimizing harmful environmental impacts.

The other options do not accurately capture the primary concern; while factors like pressure or cost could be relevant in different contexts, they are not the main reasons for limiting carbonate content specifically regarding leachate management.