II: Prevention and Remediation Processes of Acid Mine Drainage

It is unanimously agreed that 'prevention is better than cure', hence it is better to prevent the occurrence of AMD in the first place. In contrast to preventive techniques, the remediation and/or corrective methods are those that treat AMD in such a way that it ceases to be a threat to the environment and/ or the threat to the environment is minimized. The chapters in this part of the book discuss techniques and processes that are aimed at preventing the formation of AMD, including the number of remediation methods, which are generally categorized as conventional and non-conventional methods, are also critically analysed and discussed. Life-cycle assessment of AMD treatment processes is also covered.

Prevention Processes for Acid Mine Drainage

Geoffrey S. Simate

CONTENTS

  • 6.1 Introduction................................................................................................117
  • 6.2 Preventive Techniques for Acid Mine Drainage...................................118
  • 6.2.1 Control of Water Movement.........................................................118
  • 6.2.2 Selective Separation and Blending of Sulphide-Rich

Materials..........................................................................................119

  • 6.2.3 Physical Separation Barriers for Water and Oxygen................121
  • 6.2.3.1 Dry Covers.......................................................................121
  • 6.2.3.2 Water Covers....................................................................124
  • 6.2.4 Inhibition of Iron and Sulphur-Oxidizing Microorganisms........125
  • 6.2.5 Other Methods...............................................................................126
  • 6.2.5.1 Sulphide Passivation or Microencapsulation..............126
  • 6.2.5.2 Desulphurisation.............................................................129
  • 6.2.5.3 Electrochemical Protection Systems.............................129
  • 6.3 Concluding Remarks.................................................................................131

References.............................................................................................................131

 
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