Abstract
Lead hydroxyapatite was synthesized hydrothermally at 150°C under saturated vapor pressure for 1h. This apatite or lead nitrate solution was added to ordinary portland cement (OPC) in order to immobilize the Pb2+. In this paper, the effect of Pb2+ on the hydration of OPC, mechanical properties of OPC pastes and the leaching characteristic of Pb2+ from hardened pastes were investigated. An addition of lead hydroxyapatite did not affect the hydration of OPC significantly, while that of lead nitrate solution affected the hydration of OPC. Therefore, a larger amount of Pb2+ could be immobilized by cement paste with lead hydroxyapatite than that with lead nitrate solution. The strength for hardened paste with lead hydroxyapatite was larger than that with nitrate solution. According to the leaching test for pastes, the apparent diffusion coefficient of Pb2+ in the paste with lead hydroxyapatite was smaller than that of Pb2+ in the paste with addition of lead nitrate solution.
| Original language | English |
|---|---|
| Pages (from-to) | 650-654 |
| Number of pages | 5 |
| Journal | Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan |
| Volume | 105 |
| Issue number | 8 |
| Publication status | Published - 1997 Aug |
| Externally published | Yes |
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Keywords
- (Pb(PO)(OH))
- Immobilization
- Lead hydroxyapatite
- Ordinary portland cement (OPC)
- Pb
ASJC Scopus subject areas
- Ceramics and Composites
Cite this
Immobilization of Pb2+ with ordinary portland cement - The method using lead hydroxyapatite. / Cho, Jae Woo; Ioku, Koji; Goto, Seishi.
In: Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan, Vol. 105, No. 8, 08.1997, p. 650-654.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Immobilization of Pb2+ with ordinary portland cement - The method using lead hydroxyapatite
AU - Cho, Jae Woo
AU - Ioku, Koji
AU - Goto, Seishi
PY - 1997/8
Y1 - 1997/8
N2 - Lead hydroxyapatite was synthesized hydrothermally at 150°C under saturated vapor pressure for 1h. This apatite or lead nitrate solution was added to ordinary portland cement (OPC) in order to immobilize the Pb2+. In this paper, the effect of Pb2+ on the hydration of OPC, mechanical properties of OPC pastes and the leaching characteristic of Pb2+ from hardened pastes were investigated. An addition of lead hydroxyapatite did not affect the hydration of OPC significantly, while that of lead nitrate solution affected the hydration of OPC. Therefore, a larger amount of Pb2+ could be immobilized by cement paste with lead hydroxyapatite than that with lead nitrate solution. The strength for hardened paste with lead hydroxyapatite was larger than that with nitrate solution. According to the leaching test for pastes, the apparent diffusion coefficient of Pb2+ in the paste with lead hydroxyapatite was smaller than that of Pb2+ in the paste with addition of lead nitrate solution.
AB - Lead hydroxyapatite was synthesized hydrothermally at 150°C under saturated vapor pressure for 1h. This apatite or lead nitrate solution was added to ordinary portland cement (OPC) in order to immobilize the Pb2+. In this paper, the effect of Pb2+ on the hydration of OPC, mechanical properties of OPC pastes and the leaching characteristic of Pb2+ from hardened pastes were investigated. An addition of lead hydroxyapatite did not affect the hydration of OPC significantly, while that of lead nitrate solution affected the hydration of OPC. Therefore, a larger amount of Pb2+ could be immobilized by cement paste with lead hydroxyapatite than that with lead nitrate solution. The strength for hardened paste with lead hydroxyapatite was larger than that with nitrate solution. According to the leaching test for pastes, the apparent diffusion coefficient of Pb2+ in the paste with lead hydroxyapatite was smaller than that of Pb2+ in the paste with addition of lead nitrate solution.
KW - (Pb(PO)(OH))
KW - Immobilization
KW - Lead hydroxyapatite
KW - Ordinary portland cement (OPC)
KW - Pb
UR - http://www.scopus.com/inward/record.url?scp=0031212565&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0031212565&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0031212565
VL - 105
SP - 650
EP - 654
JO - Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan
JF - Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan
SN - 0914-5400
IS - 8
ER -