킬레이트 수지에 의한 Mo(Ⅵ)과 W(Ⅵ)의 분리 및 흡착 = Separation and Adsorption of Heavy Metals Using Shelate Resins

다국어 초록 (Multilingual Abstract)

Three kinds of chelate resins bearing iminodiacetic acid, diethanolamine or diethylenetriamine have been applied to selectively separate and recover one component in a mixture of heavy metals, Mo and W, where their chemical properties are very similar. The adsorption behavior of metal ions was investigated for each chelate resin under various experimental conditions such as time, pH, metal ion concentration by a batch experiment. The chelate resins complexed by Mo or W were characterized by FTIR and ¹H NMR.
The metal uptake of each chelate resin decreased with increasing pH. The resins were found to selectively chelate MoO₄^2- over a pH range of 2∼6. The chelate resin with diethanolamine groups showed the maximum adsorption capacity for Mo and W over a pH range of 1∼6 among three resins used. However, the resin with iminodiacetic acid groups showed the best results to separate Mo and W selectively.
The ¹H NMR study using the homogeneous analogue suggests the higher selectivity of iminodiacetic acid group toward Mo over W.