从络合沉淀平衡计算了当EDTA的总浓度为2.0×10~(-2)M、铁浓度为1.0×10~(-2)M时,pH在11.2才出现Fe(OH)_3沉淀,这与本文的实验结果一致。找到了从含EDTA的废液中回收铀和EDTA的方法。用氢氧化铵沉淀铀后滤液的铀浓度在2毫克/升以下,铁、铬、镍基本上不随铀沉淀。EDTA可回收成固体状态,回收率为81.5%。 Calculated from the equilibrium of complex precipitation, when the total concentration of EDTA is 2.0 × 10 ~ (-2) M and the concentration of iron is 1.0 × 10 ~ (-2) M, the precipitation of Fe (OH) _3 appears at pH 11.2 Consistent with the experimental results of this paper. Found the method of recovering uranium and EDTA from waste liquid containing EDTA. Uranium hydroxide precipitated with ammonium hydroxide after the filtrate uranium concentration of 2 mg / L or less, iron, chromium, nickel is essentially no precipitation with uranium. EDTA can be recycled to a solid state with a recovery of 81.5%.