Imobilisasi Polutan Fe dan Pb dalam Limbah Oli Bekas dengan Solidifikasi/Stabilisasi

Abstract

Lubricant waste is categorized as hazardous waste stated in government regulation (PP) 101/ 2014. It could dangers human being and environment. This problem can be addressed by solidification/stabilization process. In this work, lubricant waste was solidified/stabilized in a mixture of lubricant waste with cement as binder and silica sand into mortar sized of (5x5x5) cm. This study was aimed to investigate the influences of ratio of lubricant waste to water (ratio o/a) and curing time or age of mortar to the effectiveness of s/s process by testing mortar quality physically and chemically. The test includes compressive strenght test and leaching test (toxicity characteristic leaching procedure). The results showed compressive strenght value for mortar with the ratio o/a 0%:100%, 15%:85%, and 25%:75% in the age of mortar 7 days, 14 days, and 28 days was met the compressive strenght value qualification standardized by SNI-15-7064.2004 and ASTM C-150-02. The test of samples mortar leached using TCLP test method showed that the concentration of Pb and Fe for the ratio o/a 0%:100%, 15%:85%, dan 25%:75% and age of mortar 7 days, 14 days, and 28 days ranges 0,517x10-6 – 0,612x10-6 mg/L, and 0,174x10-6 – 0,780x10-6 mg/L respectively. The concentrations of Pb were less than the concentration of quality standard and pass the TCLP test defined by attachment of government regulation (PP) 101/2014.