2003
DOI: 10.1524/ract.91.12.721.23417
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Sorption of Np(V) by synthetic hydroxyapatite

Abstract: The sorption of Np(V) to synthetic hydroxyapatite was determined in batch experiments in a 0.1M NaClO

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Cited by 37 publications
(28 citation statements)
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“…Apatite minerals sequester elements into their molecular structures via isomorphic substitution, whereby elements of similar physical and chemical characteristics replace calcium, phosphate, or hydroxide in the hexagonal crystal structure (Hughes et al 1989, Spence andShi 2005). Apatite has been used for remediation of other metals, including uranium (Arey et al 1999, Fuller et al 2002Jeanjean et al 1995), lead (Bailliez et al 2004, Mavropoulos et al 2002, Ma et al 1995, plutonium (Moore et al 2005), and neptunium (Moore et al 2003). Because of the extensive substitution into the general apatite structure (Figure 2.11), over 350 apatite minerals have been identified (Moelo et al 2000).…”
Section: General Characteristics Of Apatitementioning
confidence: 99%
“…Apatite minerals sequester elements into their molecular structures via isomorphic substitution, whereby elements of similar physical and chemical characteristics replace calcium, phosphate, or hydroxide in the hexagonal crystal structure (Hughes et al 1989, Spence andShi 2005). Apatite has been used for remediation of other metals, including uranium (Arey et al 1999, Fuller et al 2002Jeanjean et al 1995), lead (Bailliez et al 2004, Mavropoulos et al 2002, Ma et al 1995, plutonium (Moore et al 2005), and neptunium (Moore et al 2003). Because of the extensive substitution into the general apatite structure (Figure 2.11), over 350 apatite minerals have been identified (Moelo et al 2000).…”
Section: General Characteristics Of Apatitementioning
confidence: 99%
“…Apatite minerals sequester elements into their molecular structures via isomorphic substitution, whereby elements of similar physical and chemical characteristics replace calcium, phosphate, or hydroxide in the hexagonal crystal structure (Hughes et al 1989;Spence and Shi 2005). Apatite has been used for remediation of other metals including U (Arey et al 1999;Fuller et al 2002Fuller et al , 1.5 2003Jeanjean et al 1995), lead (Bailliez et al 2004;Mavropoulos et al 2002;Ma et al 1995), Pu (Moore et al 2005), and Np (Moore et al 2003). Because of the extensive substitution into the general apatite structure (Figure 1.5), over 350 apatite minerals have been identified (Moelo et al 2000).…”
Section: Sr-90 Immobilization With Apatitementioning
confidence: 99%
“…Apatite minerals sequester elements into their molecular structures via isomorphic substitution, whereby elements of similar physical and chemical characteristics replace calcium, phosphate, or hydroxide in the hexagonal crystal structure (Hughes et al 1991;Spence and Shi 2005). Apatite has been used for remediation of other metals, including uranium (Arey et al 1999;Fuller et al 2002Fuller et al , 2003Jeanjean et al 1995), lead (Bailliez et al 2004;Mavropoulos et al 2002;Ma et al 1995), plutonium (Moore et al 2005), and neptunium (Moore et al 2003). Because of the extensive substitution into the general apatite structure, over 350 apatite minerals have been identified (Moelo et al 2000).…”
Section: Strontium-90 Immobilization With Apatitementioning
confidence: 99%
“…Results in this study show this sorption is quite strong (Kd = 1370 ± 439 L/kg) or 55 times stronger affinity than to sediment (Kd = 24.8 ± 0.4 L/kg). The rate of metal incorporation into the apatite crystal lattice can be relatively slow, on the order of days to years (LeGeros et al 1979(LeGeros et al , 1991Vukovic et al 1998;Moore et al 2003Moore et al , 2005. While there have been several studies of this strontium-substitution rate into apatite (Hill et al 2004;Lazic and Vukovic 1991;Raicevic et al 1996;Heslop et al 2005;Koutsoukos and Nancollas 1981), geochemical conditions differ from the application in groundwater at the 100-N Area.…”
Section: Mass Of Apatite Needed For Hanford 100-n Areamentioning
confidence: 99%