TY - GEN
T1 - Effects of salt on the sorption of lead by marine clay in column tests
AU - Ohtsubo, M.
AU - Morishita, T.
AU - Li, L.
AU - Higashi, T.
AU - Yamaoka, S.
PY - 2006/1/1
Y1 - 2006/1/1
N2 - 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.
AB - 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.
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M3 - Conference contribution
AN - SCOPUS:33744788639
SN - 0803134088
SN - 9780803134089
T3 - ASTM Special Technical Publication
SP - 135
EP - 144
BT - Contaminated Sediments
PB - American Society for Testing and Materials
T2 - 3rd International Symposium on Contaminated Sediments
Y2 - 23 May 2006 through 25 May 2006
ER -