Parameter Optimization for Vanadium-EDTA Complex Removal Using Activated Carbon

One of the methods for separation of Vanadium from secondary resources which contains it, is extraction with aqueous solution of ethylene di amine tetra acetic acid (EDTA). In this paper, removal of Vanadium from aqueous phase with adsorption method has been investigated. Because of the high ability of activated carbon in adsorption of organic compounds, a commercial activated carbon was used for adsorption of Vanadium-EDTA complex. The effects of main parameters such as initial concentration of Vanadium (Ci,v), molar ratio of EDTA to Vanadium (L/M), temperature (T) and initial pH of solution (pHi) was studied on capacity of the adsorbent. For optimization of selected parameters and having a proper model to describe behavior of the system, RSM method was used. Based on experimental results, in optimized conditions: Ci,v= 200 ppm, L/M=2, T=30 °C and pHi= 2 the maximum value of adsorption obtained 14.7 mg/g.