d201离子交换树脂分离钒、磷、硅的应用基础研究-矿物加工工程专业毕业论文.docx

硕士学位论文 ABSTRACT
AB STRACT
Vanadium is a kind of rare and high melting point metal which can be dissolved in sour or alkali lixivium,vanadium iS the form of vanadium radical which Can be adsorbed and exchanged by the anion group in the resin and be separated with paper was studied the adsorption behavior and mechanism of D20 1 resin for vanadium(V),phosphorus, conclusions were obtained as
following:
In singular element system,effects of pH,resin amount,temperature and time on adsorption behavior were best adsorption effect on vanadium could be obtained when pH was -,since it’S related with the condition of vanadium in best adsorption effect on phosphorus could be obtained when pH was — while
silicon was pill equilibrium time of vanadium was about
1 l h,phosphorus was 3 0min and silicon was temperature were beneficial for the adsorption of vanadium and phosphorus while lower temperature was good for silicon.
There was little effect of phosphorus or silicon on the adsorption of vanadium in multi element separation coefficient of vanadium and phosphorus was and the separation coefficient of vanadium and silicon was 1 when pH was —.
The results of the column dynamic adsorption experiments showed that the flow rate should be lower than suitable conditions for
the desorption were 5%Na0H-+1 O%NaCl as the eluent and 2—3BVm flow
rate.
Langmuir and Freundlich isotherms were both suitable for describing the adsorption thermodynamic study showed that the adsorption of vanadium,phosphorus and silicon was spontaneous and the entropy was adsorption of vanadium,phosphorus was endothermal but silicon Was exothermic.
A sencond--order adsorption--ion exchange ic equation was developed for the process,and the equation parameters were estimated, results indicated that the adsorption of vanadium and phosphorus