Solvent impregnation resins(SIRs)separation method combines excellent characteristics of solvent extraction method and ion exchange method organically,and the preparation method of SIRs is simple.It could be flexible to choose different carriers and extractants according to the actual situation,which is expected to a-chieve the separation and recovery of gallium.In this paper,P507 SIRs were prepared with styrene-divinyl benzene macroporous resin(HZ818)as the carrier,P507(2-ethylhexyl phosphonic acid 2-ethyl hexyl ester)as the extractant.The adsorption and separation properties of Ga(Ⅲ)in sulfuric acid system with the SIRs were stud-ied.In the static adsorption experiments,the optimum adsorption pH of Ga(Ⅲ)was 3.3,and the corresponding adsorption capacities was 13.7 mg·g-1.The adsorption equilibrium time was 14 h.The kinetic adsorption process was described by quasi-second-order kinetics and the isothermal adsorption was well consistent with the Langmuir isothermal adsorption model.The dynamic adsorption experiments showed that the low flow rate was favorable for the adsorption of Ga(Ⅲ)with P507 SIRs.Ga(Ⅲ)could be eluted easily with 1.5 mol·L-1 HCl.The stability performance of cyclic adsorption of Ga(Ⅲ)with P507 SIRs needs to be improved.In Ga(Ⅲ)-Zn(Ⅱ),Ga(Ⅲ)-Cu(Ⅱ)binary mixtures,P507 SIRs had good adsorption selectivity for Ga(Ⅲ),and Ga(Ⅲ)could be separated and enriched by controlling the pH of the solution.While in Ga(Ⅲ)-Fe(Ⅲ)binary system and Ga(Ⅲ)-Zn(Ⅱ)-Cu(Ⅱ)-Fe(Ⅲ)complex system,P507 SIRs showed good adsorption selectivity for Fe(Ⅲ),and little adsorption of Ga(Ⅲ),which indicated that the presence of Fe(Ⅲ)had a great effect on the adsorption of Ga(Ⅲ).
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