Evaluating Naphthalene Sorption to Cement-Based Solidification/Stabilization Additives

Abstract

Solidification/Stabilization (S/S) is a low cost remedial technology that is being used with success to remediate sites that contain higher molecular weight organic compounds, leading to a need to research the interaction of organic contaminants with cement-based S/S materials. The objective of this study was to examine the sorption levels of naphthalene to cement-based S/S materials. Batch testing was performed with S/S materials containing different amounts of organic carbon to investigate the sorption of naphthalene. It was found that sorption values varied, but appear to be dependent on the organic carbon present. Dynamic leach test (ANS16.1 methodology) and SPLP analysis results are presented for intact cement-based S/S materials. Contaminant migration modeling was performed to use the information obtained in the study to compare the sorption capacity of cement-based S/S systems. It was shown that cement-based S/S remediation systems can provide long-term protection against naphthalene contaminant migration.