用电容去离子技术去除含钒酸浸液中的磷  

Phosphorus Removal from Vanadium-containing Acid Leaching Solution by Capacitive Deionization Technology

作　　者：周嘉郁[1] 张一敏[1,2,3] 包申旭[1,2] 段继华[1] Zhou Jiayu Zhang Yimin Bao Shenxu Duan Jihua(School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan 430070, China School of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, China)

机构地区：[1]武汉理工大学资源与环境工程学院,湖北武汉430070 [2]矿物资源加工与环境湖北省重点实验室,湖北武汉430070 [3]武汉科技大学资源与环境工程学院,湖北武汉430081

出　　处：《金属矿山》2016年第9期107-111,共5页Metal Mine

基　　金：国家自然科学基金项目(编号:51404177)

摘　　要：石煤提钒酸浸液中含有的大量磷会直接影响后续钒的净化富集,从而影响五氧化二钒的产品纯度,甚至使产品质量不达标。采用环境友好型吸附技术——电容去离子技术(CDI)对石煤酸浸液中磷的去除条件进行了研究,并研究了电极材料对磷的吸附机理。结果表明,当施加电压为2.0 V,进料流量为25 m L/min,溶液初始p H=0.75,电极间距为9 mm时,对酸浸液中磷、钒的去除率分别为63.28%和1.30%,较好地去除了含钒酸浸液中的磷。Medusa软件模拟和红外光谱分析表明,石煤酸浸液中的磷主要以H2PO-4和PO3-4形式被电极吸附,吸附过程既有物理吸附又有化学吸附。There are mass of phosphorus in stone coal acid leaching solution which will affect the subsequent vanadium extraction process and the purity of V2O5 , which could make the product unqualified. Research on phosphorus removal from acid leaching solution by an environmentally friendly desalination technology-capacitive deionization （CDI） was uconduct- ed. The effect of operational parameters on the phosphorus removal and the adsorption mechanism of phosphorus were investiga- ted. The results show that 63.28% phosphorus and only 1.30% vanadium could be removed under the optimum conditions of 2. 0 V charging voltage, flow rate of 25 mL/min, pH of 0. 75 and the distance between polar plates of 9 mm. CDI has good sepa- ration performance of phosphorus from the stone coal acid leaching solution. The calculation by Medusa software and the FTIR analysis showed the phosphorus in stone coal acid leaching solution was adsorbed by electrode in forms of H2PO4- and PO^-. Meanwhile, the adsorption process included both physical adsorption and chemical adsorption.

关 键 词：电容去离子技术 含钒酸浸液 除磷 MEDUSA 红外光谱 

分 类 号：TQ028[化学工程]