核化学与放射化学2017，Vol.39Issue(1)：95-102,8.DOI:10.7538/hhx.YX.2015047
粉煤灰基沸石固化体中Sr2+、Cs+的浸出行为
Leaching Behavior of Sr2+ , Cs+ in Synthesized Zeolite From Fly Ash-Solidified Waste Forms
摘要
Abstract
Synthetic zeolite was prepared by hydrothermal method using fly ash from power plant as raw material.Cs+ and Sr2+ were isolated and enriched by synthetic zeolite from the radioactive waste liquid.Then,geopolymer was made with fly ash and synthetic zeolite,using sodium silicate as activator.Finally,the physical properties and the leaching resistance of the solidified body were tested,and the leaching mechanism was preliminarily discussed by XRD and SEM technology.The results show that the compressive strength and the leaching resistance of the solidified body is significantly affected by the zeolite dosage.When the dosage is 20％-30％ (mass fraction),the compressive properties reach the national standard,and the leaching rate and the accumulated leaching fraction are far lower than the national standard limits.According to the data,the curing effect of Sr2+ and Cs+ in the solidified body is different,and the curing effect of Sr2+ is more excellent.The leaching rate of 42 d is 1.87×10-6 cm/d,and the leaching fraction is 3.3× 10-4 cm.The experimental reveal that the Sr2+ and Cs+ of synthesized zeolite from fly ash have excellent curing effect.关键词
粉煤灰/沸石/固化/抗压强度/浸出率Key words
fly ash/zeolite/solidified/compressive strength/leaching rate分类
资源环境引用本文复制引用
罗洁,廖蓉,王亚举,张海军,杨剑,黄胜..粉煤灰基沸石固化体中Sr2+、Cs+的浸出行为[J].核化学与放射化学,2017,39(1):95-102,8.基金项目
西南科技大学博士科研基金资助项目(11zx7112) （11zx7112）
西南科技大学研究生创新基金资助项目(15ycx41) （15ycx41）
