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<p>This study examines acid mine drainage (AMD) from the Sungun copper mine in Northwest Iran, focusing on copper recovery via cementation using iron scrap and filings. Key factors such as pH, iron concentration, contact time, and stirring conditions were evaluated, with the highest recovery within the parameters which were identified as a pH of 3 and an iron-to-copper ratio of 2.5. Additionally, effective durations were identified as 60&#xa0;min for iron filings, 72&#xa0;h for scrap iron, and 3&#xa0;h with stirring at 400&#xa0;rpm and 330&#xa0;K. Calcium hydroxide and sodium sulfide were employed for the treatment of AMD, successfully achieving complete removal of pollutants in accordance with US Environmental Protection Agency (EPA) standards. It was found that the highest precipitation conditions for calcium hydroxide were at a pH of 9, with a consumption rate of 2&#xa0;g per 1 L and a processing time of 15&#xa0;min. This research demonstrates effective copper recovery methods and emphasizes sustainable mining practices and environmental protection.</p> Graphical Abstract <p></p>

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Copper Recovery and Treatment of Acid Mine Drainage from Sungun Copper Mine

  • 期刊论文

  • 发表日期：

    2025年10月24日

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  • Seyedmahdi Sadeghi,
  • Fatemeh Sadri,
  • Shima Barakan,
  • Ehsan Bidari,
  • Valeh Aghazadeh

摘要

This study examines acid mine drainage (AMD) from the Sungun copper mine in Northwest Iran, focusing on copper recovery via cementation using iron scrap and filings. Key factors such as pH, iron concentration, contact time, and stirring conditions were evaluated, with the highest recovery within the parameters which were identified as a pH of 3 and an iron-to-copper ratio of 2.5. Additionally, effective durations were identified as 60 min for iron filings, 72 h for scrap iron, and 3 h with stirring at 400 rpm and 330 K. Calcium hydroxide and sodium sulfide were employed for the treatment of AMD, successfully achieving complete removal of pollutants in accordance with US Environmental Protection Agency (EPA) standards. It was found that the highest precipitation conditions for calcium hydroxide were at a pH of 9, with a consumption rate of 2 g per 1 L and a processing time of 15 min. This research demonstrates effective copper recovery methods and emphasizes sustainable mining practices and environmental protection.

Graphical Abstract