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Artigo • Quím. Nova 33 (8) • 2010 • https://doi.org/10.1590/S0100-40422010000800011   copy

Coal mining waste as adsorbent for removal of acidity, Fe (III), Al (III) and Mn (II) in acid drainage

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This study aimed the use of coal mining waste as a new adsorbent for H3O+ and removal of Al (III), Fe (III) and Mn (II) from acid mine drainage. Data from kinetic and equilibrium of the adsorption of H3O+ followed the pseudo second-order and Langmuir isotherm models. The maximum adsorption capacity of H3O+ was 316 mmol kg-1. The adsorbent removed 100% of Al (III), 100% of Fe (III) and 89% of Mn (II), suggesting its use as an alternative for the treatment of acid mine drainage.

coal mining waste; adsorption H3O+; removal metallic ions

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