化工环保2016，Vol.36Issue(4)：421-427,7.DOI:10.3969/j.issn.1006-1878.2016.04.013
粉煤灰-粉煤灰合成沸石对Cs+的固化
Solidification of Cs+ in fly ash and zeolite synthesized from fly ash
摘要
Abstract
The synthetic zeolite-A was prepared by alkali fusion-hydrothermal method using waste fly ash in power plant as raw material. The zeolite was used to isolate and enrich Cs+ in solution,and then to form geopolymer solidified body with fly ash under the effect of activator. The performances of the solidified body were evaluated and the soidificaton mechanism was discussed. The experimental results show that:Under the conditions of adsorption temperature 25℃, initial Cs+ mass concentration 100 mg/L and solid-liquid ratio 10.0 g/L,the equilibrium adsorption rate of Cs+ on the zeolite is reached 98%,which ismore than 2 times higher than that on fly ash;When the zeolite dosage is 20%-30%(w),the solidified body exhibits excellent leaching resistance performances,the compressive strength of the solidified body meets the requirement in GB 14569.1-2011,and the leaching rate and accumulated leaching fraction of Cs+ in the solidified body are far lower than the standard limits in GB 14569.1-2011.关键词
粉煤灰/沸石/固化/抗压强度/浸出率Key words
fly ash/zeolite/solidification/compressive strength/leaching rate分类
资源环境引用本文复制引用
张海军,罗洁,王亚举,杨剑,黄胜..粉煤灰-粉煤灰合成沸石对Cs+的固化[J].化工环保,2016,36(4):421-427,7.基金项目
西南科技大学博士科研基金项目（11zx7112）；西南科技大学研究生创新基金项目（15ycx041）。 （）
