Modeling and Optimization of Manganese Carbonate Precipitation Using Response Surface Methodology and Central Composite Rotatable Design

A sulfate solution containing 1773.965 mg/L Mn2+, 3216.178 Mg2+ and 566.254 Ca2+ was used to perform the maximum recovery of manganese minimum magnesium. Carbonate precipitation due better selectivity for over magnesium other impurities compared hydroxide precipitation. Four factors were studied: pH value, contact time, reaction temperature sodium carbonate consumption. Analysis variance (ANOVA) response surface methodology (RSM) determine optimum. Under optimum conditions, recoveries highest lowest respectively, while pH, volume Na2CO3 lowest. The values four found as followed: 8.9293, 60.69 min, 77.95°F, 50.7650 mL respectively. Moreover, 99.9799% 4.3045% results show that optimization using RSM is effective in improving manganese.