摘要
采用5种离子交换树脂分离钒渣浸出液中钒与铬,对比了其吸附选择性、吸附量和吸附速率,考察了pH值、接触时间、温度、初始浓度等因素对钒铬分离的影响.结果表明,SQ-20A树脂对钒具有较强的吸附作用,对铬的吸附作用较弱,在pH=9.0、温度298 K的条件下,钒铬分离系数达最大值215.23.钒在SQ-20A树脂上的吸附为吸热过程,符合Freundlich和Langmuir方程,反应级数为拟二级,吸附过程的控制步骤为颗粒扩散过程.
Five ion-exchange resin was tested for adsorption of vanadium and chromium, and their adsorption capacities and adsorption rates towards vanadium and chromium were compared. Some effecting factors such as pH value, contact time, temperature and initial concentration of vanadium on separating chromium and vanadium by anion resin were investigated. The results showed that the SQ-20 A resin has strong adsorption capacity for vanadium while has weak adsorption capacity for chromium, the maximum separation factor have reached 251.23 on the conditions of pH=9.0 and temperature 298 K. The adsorption of vanadium on the SQ-20 A resin was an endothermic process, and the adsorption isotherm fitted to the Langmuir and Frendlich models simultaneously. The adsorption kinetics follwed the Pseudo-second-order model, and the adsorption rate was mainly controlled by particle diffusion. The static adsorption experiments showed that the SQ-20 A resin has good selective adsorption capacity for vanadium, which could meet the demands of separating chromium and vanadium.
作者
阳亚玲
颜文斌
高峰
YANG Ya-ling YAN Wen-bin GAO Feng(College of Chemistry and Chemical Engineering, Jishou University, Jishou, Hunan 416000, China Hunan Xuetian Fine Chemical Industry Co. Ltd., Changsha, Hunan 410015, China Key of Mineral Cleaner Production ＆ Exploit of Green Functional Materials in Hunan Province, Jishou, Hunan 416000, China Collaborative Innovation Center of Mn-Zn-V lnd. Technol. of the 2011 Plan of Hunan Province, Jishou, Hunan 416000, China)
出处
《过程工程学报》
CAS
CSCD
北大核心
2017年第1期84-91,共8页
The Chinese Journal of Process Engineering
基金
国家自然科学基金资助项目(编号:21566010)
湖南省高校科技创新团队支持计划资助项目
关键词
钒渣浸出液
钒
铬
分离
离子交换法
静态吸附
vanadium slag leaching solution
V2O5
Cr（Ⅵ）
separation
ion exchange
static adsorption
