A VERY BRIEF INTRODUCTION TO ACID AND ALKALINE MINE DRAINAGE AND THEIR TREATMENT BY PASSIVE METHODS

Some terms

Reactions to help understand AMD from coal mining

Fe2+ does not precipitate from solution unless pH is quite high

This rxn causes pH to go up

This rxn causes pH to go down; Al3+ behaves like Fe3+, i.e., it forms a white aluminum hydroxide, though pH must be approximately 5.5 for aluminum to precipitate

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