生物硅源制备花状硅酸镁及其对放射性核素U(VI)的去除

HFCAS OpenIR

	生物硅源制备花状硅酸镁及其对放射性核素U(VI)的去除
其他题名	Preparation of flower-like magnesium silicate from biomass silicon for radionuclide U(VI)removal
	2019
发表期刊	中国科学:化学
ISSN	1674-7224
摘要	放射性核素U(VI)的水污染问题已经成为当前核能发展亟待解决的难题之一.硅酸镁因其独特的结构特征,在水污染治理方面具有广泛的应用前景.因此,采用废弃生物硅源来代替传统硅源,制备高性能硅酸镁吸附剂具有极大的研究价值.本文通过两步法制备了高性能花状硅酸镁吸附剂,并对其进行了表征.系统研究了溶液的pH、吸附时间、吸附剂用量等因素对硅酸镁吸附行为的影响.结果表明,硅酸镁对U(VI)的吸附动力学符合拟二级速率方程;吸附和pH有很强的依赖关系;最大吸附量高达~663.7 mg/g,吸附过程符合Langmuir模型.
其他摘要	The serious environmental pollution have been one of the most important scientific problems to be urgently solved in the social development process. Metal silicates have attracted extensive interest due to their unique structure and promising properties in adsorption. Rice husks are suitable natural reservoirs for the preparation of high value-added nanostructured silicate-based adsorbents. Inspired by this proposal, we herein reported a facile and general strategy to fabricate flower-like magnesium silicate with ultrathin nanosheets from the low-cost rice husks as sustainable silicon sources. The as-prepared magnesium silicate was used as an adsorbent to test its adsorption performance towards U(Ⅵ)remove. Dependent on batch adsorption experiments, the adsorption behavior and removal efficiency of U(Ⅵ) under various environmental conditions(e.g., p H, contact time and solid content) were simulated systematically. The results showed that the adsorptive properties were highly pH dependent. The adsorption system obeyed the pseudo-secondorder kinetic models. The adsorption data were well fitted with the Langmuir isotherms, and the maximum adsorption capacity was up to ～663.7 mg/g.
关键词	生物硅硅酸镁放射性核素U(VI) 吸附
收录类别	CSCD
语种	中文
CSCD记录号	CSCD:6411340
引用统计	被引频次：1[CSCD] [CSCD记录]
文献类型	期刊论文
条目标识符	http://ir.hfcas.ac.cn:8080/handle/334002/65787
专题	中国科学院合肥物质科学研究院
推荐引用方式 GB/T 7714	. 生物硅源制备花状硅酸镁及其对放射性核素U(VI)的去除[J]. 中国科学:化学,2019,049.
APA	(2019).生物硅源制备花状硅酸镁及其对放射性核素U(VI)的去除.中国科学:化学,049.
MLA	"生物硅源制备花状硅酸镁及其对放射性核素U(VI)的去除".中国科学:化学 049(2019).