Efficiency of Macroporous Poly(Vinylphosphoramidic Acid) Resin Adsorbing of Selected Elements and Determination of Trace Dysprosium Holmium Erbiom and Ytterbium in Waste Water by Inductively Coupled Plasma Optical Emission Spectrometry

Abstract

Abstract A macroporous poly(vinylphosphoramidic acid) resin is synthesized through the reaction of macroporous poly-(vinylethylenediamine) resin with formaldehyde and phosphorous acid. The adsorption efficiency of the resin to selected elements is determined. An ICP-OES method has been established for the resin enrichment and separation of trace Dy, Ho, Er and Yb ions in waste water. The experiments show that the resin can adsorb strongly Au (III), Pt(IV), Pd(IV), Ir(IV), and Hg(II) ions in the pH range 1–4, and can adsorb quantitatively Dy, Ho, Er end Yb ions at pH 4 ∼ 5, but for other elements less at pH ≤5. The ability of the Na-form resin to adsorb Dy, Ho, Er, and Yb ions is far better than the H-form resin. The recovery of the former can reach 1007. and its adsorbing capacity is over 100 mg/g. The recovery ratio of Dy, Ho, Er and Yb desorbed from the resin with 17. EDTA-Na solution is between 96·07. and 1007., and the RSD is in the range of 3·4 - 4·27%. The enrichment and determination of the above r...