Selective separation behavior of silica gel for zirconium in simulated high level radioactive liquid waste

Citation
Yq. Zhang et al., Selective separation behavior of silica gel for zirconium in simulated high level radioactive liquid waste, J RAD NUCL, 247(1), 2001, pp. 205-208
Citations number
14
Categorie Soggetti
Inorganic & Nuclear Chemistry
Journal title
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
ISSN journal
02365731 → ACNP
Volume
247
Issue
1
Year of publication
2001
Pages
205 - 208
Database
ISI
SICI code
0236-5731(200101)247:1<205:SSBOSG>2.0.ZU;2-6
Abstract
Zirconium in simulated high lever radioactive liquid waste (HLLW) was selec tively adsorbed and separated by self-made high adsorption activity silica gel. The selective adsorption mechanism was analyzed according to the struc ture character of self-made silica gel and performance of zirconium in acid simulated HLLW. The results show that the adsorption selectivity of self-m ade silica gel for zirconium is strong, because zirconium has higher positi ve charge and zirconium ion hydrolyzes easily. Distribution coefficient of self-made silica gels for zirconium is 53.5 ml/g. There are 6.5 (OH)/nm(2) on the surface on self-made silica gels which provide more adsorption activ ity places, thus self-made silica gels have higher adsorption capacity for zirconium (31.4 mg/g). The elution rate of the adsorption of zirconium on s elf-made silica gel by 0.2 mol/l H2C2O4 is more than 99%. The solubility of the self-made silica gel in nitric acid is low, the chemical stability of self-made silica gel is very strong.