Geography, 04.10.2019 21:00 bradenhale2001

4) explain the technologies available for the treatment of acid mine drainage. why are the different techniques referred to as "active" and "passive" treatments? what options are available for the treatment of acid groundwater? what treatment options are available in the presence of ferric iron (fe3+)? (0 5) describe the wastes that accumulate at phosphate mines.

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