【摘要】 研究了以铁置换除去Ag⁺、Pd²⁺等金属离子;（NH₄）₂SO₄-LO-丁基罗丹明B浮选分离Cd²⁺的行为及其与常见离子分离的条件。结果表明,在一定浓度的Fe²⁺存在时铁能定量置换出溶液中的Ag⁺、Pd²⁺等金属离子,而Cd²⁺在此条件下不被置换;当固体（NH₄）₂ SO₄用量为1．0g, 0．1 moL/L KI溶液和1．0×10^-3mol/L丁基罗丹明B溶液的用量分别为2．0 mL、2．5 mL时,Cd²⁺可被定量浮选,而Zn²⁺、Ni²⁺、Mn²⁺、Co²⁺、Al³⁺、Fe²⁺、Cu²⁺等离子在此条件下不被浮选,实现了Cd²⁺的定量分离。对合成水样的定量置换-浮选分离测定,Cd²⁺的浮选率为98．3%～100．6%;对矿石国家一级标准物质分离后测定微量Cd²⁺,结果与标准值相符。更多还原

【Abstract】 A separation process involving the removal of Ag⁺ and Pd²⁺ by displacement with Fe and flotation separation of Cd²⁺ from other metal ions by（NH₄）₂SO₄-KI-bu-RhB was studied.The results showed that Ag⁺ and Pd²⁺ can be replaced by Fe in the presence of certain amount of Fe²⁺.It also showed that with 1.0 g of （NH₄）₂SO₄,2.0 mL of 0.1 mol/L KI and 2.5 mL of 1.0×10^-3 mol/L bu-RhB,Cd²⁺ was quantitatively floa- ted,while Zn²⁺,Ni²⁺,Mn²⁺,Co²⁺,Al³⁺,Fe²⁺,Cu²⁺were not floated.Cd²⁺ was separated from other metal ions in synthetic water samples with flotation rate of 98.3%～100.6%.This process was used in separation and determination of Cd²⁺ in National Standard ore samples with satisfactory results.更多还原