Authors : Firsta Hilwa and Setyo Sarwanto Moersidik
Abstract: Used lubricating oil is one of waste categorized as hazardous and toxic waste. It contains heavy metal and one of them is lead. The existence of lead is due to when the engine is working, so that, the engine is wearing and lead metal is released to the lubricant. Removing lead from used lubricating oil can be done by using natural clay (bleaching Earth) as adsorbent. In this study, the clay was activated by using sulfuric acid (H2SO4) with 1, 1.5 and 2 M concentration variation. By using sulfuric acid, the percentage of montmorillonite mineral increased up to 68% and the surface area expanded up to 62.9 m2/g. Activation is also seen to increase the adsorbensi, power and shorten the contact time. From the experimental results, it is found that optimum adsorption conditions occured at activation with concentration of 1.5 M and with 30 min adsorption time. Under these conditions, concentration variation of adsorbent with concentration of 20, 40, 60, 80 and 100 g/L were observed. With this variation, the result shows optimum concentration of 20 g/L.
Firsta Hilwa and Setyo Sarwanto Moersidik, 2019. Increased Removal Efficiency of Lead (Pb) in used Lubricating Oil with Acid Activated Clay. Journal of Engineering and Applied Sciences, 14: 8479-8483.