Durability testing of an iodate-substituted hydroxyapatite designed for the conditioning of ¹²⁹I

详细信息    查看全文

• 作者：Antoine Coulon^a ; Agnes Grandjean^b ; Danielle Laurencin^c ; Patrick Jollivet^d ; Sylvie Rossignol^e ; Lionel Campayo^a ; ^{lionel.campayo@cea.fr}
• 关键词：Iodine ; Apatite ; Iodate ; Durability ; Nuclear waste
• 刊名：Journal of Nuclear Materials
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：484
• 期：Complete
• 页码：324-331
• 全文大小：1460 K
• 卷排序：484

文摘

A two-step mechanism can account for the resistance to leaching in pure water of iodate-substituted hydroxyapatites (HA-CaI). For unsaturated conditions, the leaching of HA-CaI in pure water at 50 °C corresponds to a congruent dissolution. For saturated conditions, the leaching of HA-CaI in pure water at 50 °C corresponds to an exchange between IO3- and OH- ions. In a clayey water, the leaching of HA-CaI is lowered by the immediate precipitation of Ca10(PO4)6(OH)2. HA-CaI could be a suitable conditioning matrix for radioactive iodine that is particularly adapted for a clayey environment.