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Zeolite-bearing tuff (stilbite) was shown to be an effective and efficient adsorbent for treating acid mine drainage (AMD). We tested the adsorption of zinc ions from a synthetic acid aqueous solution and AMD from the Sasa mine. The concentration of zinc ions in the AMD decreased from 2.219 to 0.564 mg/dm3 (74% removal). The solution pH, prior to treatment with the zeolite-bearing tuff, was 3.90,...
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