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以盐酸和Sm Cl_3溶液作为洗液,对负载Sm~(3+)和Zn~(2+)的有机相进行洗涤,分别研究了添加和未添加NH_4Cl的洗液对负载有机相中Zn~(2+)洗涤率的影响。结果表明,在相比O/A为2∶1时,用1.5 mol/L盐酸添加3 mol/L NH_4Cl洗液,可以将Zn~(2+)完全洗涤,而未添加NH_4Cl的洗液酸度大于等于2 mol/L时,才能将Zn~(2+)完全洗涤;以0.5 mol/L Sm Cl_3溶液添加NH_4Cl作为洗液,Zn~(2+)完全被洗涤,未添加NH_4Cl的Sm Cl_3洗液,Zn~(2+)洗涤率为92.35%。
The organic phase loaded with Sm ~ (3+) and Zn ~ (2+) was washed with hydrochloric acid and SmCl_3 as the washings. The effects of washing with and without NH_4Cl on the adsorption of Zn ~ ( 2+) wash rate. The results showed that Zn 2+ could be completely washed by adding 3 mol / L NH_4Cl with 1.5 mol / L hydrochloric acid when the O / A ratio was 2:1, while the acidity of washing liquid without adding NH_4Cl was greater than Zn2 + could be completely washed when the concentration was equal to 2 mol / L; NH4Cl was added as the wash solution with 0.5 mol / L SmCl3 solution, the Zn2 + was completely washed, the SmCl3 wash solution without NH4Cl added , Zn ~ (2+) washing rate was 92.35%.