Immobilization of heavy metals of Hazardous waste using different binding materials

Abstract

Solidification/Stabilization (S/S) is a chemical treatment process which aims to either bind or complex the
compounds of a hazardous waste stream into a stable insoluble form or to entrap the waste within a solid matrix. The
U.S. Environmental Protection Agency (EPA) has identified S/S as the best demonstrated available technology for 57
RCRA (Resource Conservation and Recovery Act)-listed hazardous wastes. The present study deals with the
solidification/stabilization of waste sludge generated from metal pickling operation of an electroplating industry to
prevent or minimize the release of the contaminant into the environment. After chemical characterization of sample,
the solidification/stabilization was performed using different binding material like cement, lime and sand in different
combination. Efficiency of different combination to immobilize heavy metals of waste sludge after 14 and 28 days
solidification/stabilization assessed by leaching test and further analyses.