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

T. Morishita, L. Li, Takahiro Higashi, S. Yamaoka

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

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 deionized 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
JournalJournal of ASTM International
Volume3
Issue number6
Publication statusPublished - Aug 15 2006

Fingerprint

Ashes
Sorption
Deionized water
Clay
Seawater
Salts
Lead
Leaching
Water
Japan
Hydroxides
Clay deposits
Coal Ash
Waste Disposal Facilities
Solid Waste
Municipal solid waste
Carbonates
Land fill
Effluents
Soil

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Materials Science(all)
  • Nuclear Energy and Engineering
  • Engineering(all)
  • Public Health, Environmental and Occupational Health

Cite this

Effects of salt on the sorption of lead by marine clay in column tests. / Morishita, T.; Li, L.; Higashi, Takahiro; Yamaoka, S.

In: Journal of ASTM International, Vol. 3, No. 6, 15.08.2006.

Research output: Contribution to journalArticle

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