Effects of salt on the sorption of lead by marine clay in column tests

M. Ohtsubo, T. Morishita, L. Li, T. Higashi, S. Yamaoka

Research output: Chapter in Book/Report/Conference proceedingConference contribution


In recent years incinerated municipal solid waste has been disposed of in landfill sites near the coastal area in Japan where the underlying marine clay deposits are expected to serve as a natural clay barrier. In this study, marine clay from Japan is examined for the effects of salt on sorption of lead using column leaching tests with deionlzed water, sea water, and bottom ash leachate spiked with 100 mg/L lead as permeants, and then selective sequential extraction (SSE) was employed to assess the retention mechanism of lead onto marine clay. Lead concentration in the effluent was less than 5 MG/L throughout the column leaching tests with the deionized water, whereas it exceeded Pb concentration in Influent below one pore volume leaching for the sea water. Lead in pore water accumulated in the top layer of the column soil for the deionized water whereas it was distributed throughout the depth for the sea water and ash leachate. The SSE Indicated that carbonate, exchangeable, and hydroxides phases are predominant for Pb retention.

Original languageEnglish
Title of host publicationContaminated Sediments
Subtitle of host publicationEvaluation and Remediation Techniques
PublisherAmerican Society for Testing and Materials
Number of pages10
ISBN (Print)0803134088, 9780803134089
Publication statusPublished - 2006
Event3rd International Symposium on Contaminated Sediments - Shizuoka, Japan
Duration: May 23 2006May 25 2006

Publication series

NameASTM Special Technical Publication
ISSN (Print)0066-0558


Other3rd International Symposium on Contaminated Sediments

All Science Journal Classification (ASJC) codes

  • General Engineering


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