Rubidium and Cesium Ion Adsorption by a Potassium Titanium Silicate-Calcium Alginate Composite Adsorbent

ISL OpenIR > 青海盐湖研究所知识仓储

	Rubidium and Cesium Ion Adsorption by a Potassium Titanium Silicate-Calcium Alginate Composite Adsorbent
	Li, Bucheng 1,2; Liu, Haining1 ; Ye, Xiushen1 ; Li, Shiyou 2; Wu, Zhijian1
	2014-05-03
发表期刊	SEPARATION SCIENCE AND TECHNOLOGY
卷号	49 期号:7 页码:1076-1085
关键词	Rubidium Cesium Potassium Titanium Silicate Composite Adsorbent Brine
摘要	In this work, a composite spherical adsorbent, which employs potassium titanium silicate as an adsorption active component, and calcium alginate as a carrier, was successfully prepared. Scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) were used to characterize the adsorbent. The kinetics and thermodynamics of rubidium and cesium ions adsorption were investigated comprehensively, by considering the effects of initial concentration, temperature, solution pH, and coexisting NaCl. According to the determination coefficients, the pseudo second-order kinetic model provided an impressive and comparable correlation, and the second-order rate constant and the initial adsorption rate increase with increasing temperature. In general, the equilibrium adsorption amount increases with the increasing initial metal ion concentration, but decreases with increasing coexisting NaCl. The adsorption capacity keeps constant in the pH value range 3-12 and slightly fades when the temperature increases from 25 to 55 degrees C. Under similar conditions, rubidium and cesium show the similar adsorption amount. The adsorbent has a fast adsorption rate and an adsorption capacity of about 1.55 mmol g(-1) for rubidium and 1.47 mmol g(-1) for cesium when the initial metal ion concentration is 0.10 mol L-1. The composite adsorbent is effective for the adsorption of rubidium or cesium ions from simulated brines.
语种	英语
引用统计
文献类型	期刊论文
条目标识符	http://ir.isl.ac.cn/handle/363002/5663
专题	青海盐湖研究所知识仓储中国科学院青海盐湖研究所盐湖资源与化学实验室
作者单位	1.Chinese Acad Sci, Qinghai Inst Salt Lakes, Key Lab Salt Lake Resources & Chem, Xining 810008, Peoples R China 2.Lanzhou Univ Technol, Coll Petrochem Technol, Lanzhou, Peoples R China
推荐引用方式 GB/T 7714	Li, Bucheng,Liu, Haining,Ye, Xiushen,et al. Rubidium and Cesium Ion Adsorption by a Potassium Titanium Silicate-Calcium Alginate Composite Adsorbent[J]. SEPARATION SCIENCE AND TECHNOLOGY,2014,49(7):1076-1085.
APA	Li, Bucheng,Liu, Haining,Ye, Xiushen,Li, Shiyou,&Wu, Zhijian.(2014).Rubidium and Cesium Ion Adsorption by a Potassium Titanium Silicate-Calcium Alginate Composite Adsorbent.SEPARATION SCIENCE AND TECHNOLOGY,49(7),1076-1085.
MLA	Li, Bucheng,et al."Rubidium and Cesium Ion Adsorption by a Potassium Titanium Silicate-Calcium Alginate Composite Adsorbent".SEPARATION SCIENCE AND TECHNOLOGY 49.7(2014):1076-1085.