Nickel and Zinc Removal from Acid Mine Drainage: Roles of Sludge Surface Area and Neutralising Agents

<table class="table-group" id="tab2"><tr><td><table class="table"><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr class="thead"><td align="left" rowspan="2">wt.%</td><td align="center" colspan="2">Alkaline reagent</td></tr><tr class="thead"><td align="center">Ca(OH)2</td><td align="center">CaCO3</td></tr><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr><td align="left">SiO2</td><td align="center">15.4</td><td align="center">3.5</td></tr><tr><td align="left">Al2O3</td><td align="center">30.4</td><td align="center">15.2</td></tr><tr><td align="left">Fe2O3</td><td align="center">21.1</td><td align="center">9.4</td></tr><tr><td align="left">CaO</td><td align="center">1.5</td><td align="center">33.7</td></tr><tr><td align="left">SO3</td><td align="center">4.9</td><td align="center">3.6</td></tr><tr><td align="left">Na2O</td><td align="center">0.3</td><td align="center">0.1</td></tr><tr><td align="left">LOI</td><td align="center">29.1</td><td align="center">34.0</td></tr><tr class="table-tr"><td colspan="3"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

Results of major oxide by XRF for Ca(OH)2 and CaCO3 neutralised AMD precipitates.

Journal of Mining

tab2

Table 2

Table 2: Nickel and Zinc Removal from Acid Mine Drainage: Roles of Sludge Surface Area and Neutralising Agents 