摘要
用自制高吸附活性硅胶吸附分离模拟高放废液中的锆 ,并对吸附机理进行了分析。结果表明 :硅胶对锆的吸附选择性高 ,是因为介质中锆离子具有较高的正电荷 ;硅胶对锆的静态吸附容量可达 0 344mmol/g ;用 0 2mol/LH2 C2 O4洗脱硅胶上吸附的锆 ,洗脱率高于 99% ;硅胶单位表面上的羟基数为 6 5 /nm2 ,提供了较多的吸附活性位。
Zirconium is adsorbed and separated by high adsorption activity silica gel in simulated HLLW. The selective adsorption mechanism is analyzed. The results show that adsorption selection of silica gel for zirconium is strong because zirconium has higher positive charge. The static adsorption capacity of zirconium is 0.344 mmol/g; the desorption rate of zirconium on silica gel by 0.2 mol/L H 2C 2O 4 is more than 99 %; The numbers of hydroxy groups (-OH) on the surface of silica gels made in laboratory are 6.5/nm 2 which provide more adsorption activity sites.
出处
《核化学与放射化学》
EI
CAS
CSCD
北大核心
2000年第3期156-160,共5页
Journal of Nuclear and Radiochemistry
基金
国家863计划新材料领域资助项目! (863 71 5 0 0 4 2 2 0 )
国家自然科学基金!资助项目 (2 9971 0 2 2 )
