Lead Release from Lead-acid Batteries Slag Using Waste Materials: Full Factorial Design Analysis

The present research includes the safe disposal of lead-acid batteries slag using waste materials such as red mud and fly ash. The aim of this study is to investigate the adsorption of lead removal from lead acid-batteries slag on red mud and fly ash using 2 full factorial design. The combined effects of adsorbent amount, temperature, adsorbent type and leachate solution on the lead removal adsorption were studied. Factorial design of experiments is employed to study the effect of four factors adsorbent amount (10% and 30%), temperature (20 and 60 C), adsorbent type (red mud and fly ash) and leachate solution (TCLP DIN), at two levels low and high. The results were statistically analyzed by using the student’s t-test, analysis of variance (ANOVA) and an Ftest to define important experimental factors and their levels. A regression model that considers the significant main and interaction effects was suggested. The results showed that leachate solution is the most significant factor that affects the lead removal.