Abstract

Sorption of aluminum(III) and iron(III) from their individual solutions and of iron(III) impurity from Al₂(SO₄)₃ solutions on macroporous resins, Puromet MTS9560 phosphonic acid cation exchanger and Puromet MTS9300 and Puromet S991 iminodiacetate ion exchangers, was studied. All the three resins show higher affinity for iron(III) than for aluminum(III). The Puromet MTS9560 cation-exchange resin shows the highest selectivity to iron(III) in sorption from an aluminum sulfate solution after introduction of sulfuric acid to its concentration of 2.2–2.5 M, and iminodiacetate ion-exchange resins, in sorption from a solution with рН 2.2–2.6. The Puromet MTS9300 resin synthesized on the styrene matrix surpasses the Puromet S991, resin synthesized on the acrylate matrix in the ability to uptake iron(III). Passing a solution containing 184 g L^–1 Al₂(SO₄)₃ and 2.9 g L^–1 iron(III) with рН 2.3 through a column packed with Puromet MTS9300 resin leads to deep removal of the iron(III) impurity to the residual concentration no higher than 0.002 g L^–1. Iron(III) can be desorbed from the resin virtually completely with a 1 M sulfuric acid solution.

中文翻译：

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通过吸附从硫酸铝溶液中去除铁 (III)

摘要

从各自的溶液中吸附铝 (III) 和铁 (III) 以及从 Al ₂ (SO ₄ ) _{3 中}吸附铁 (III) 杂质研究了大孔树脂、Puromet MTS9560 膦酸阳离子交换剂和 Puromet MTS9300 和 Puromet S991 亚氨基二乙酸盐离子交换剂上的溶液。所有三种树脂对铁 (III) 的亲和力都高于对铝 (III) 的亲和力。Puromet MTS9560 阳离子交换树脂在硫酸铝溶液中加入浓度为 2.2-2.5 M 的硫酸后对铁 (III) 的吸附显示出最高的选择性，而亚氨基二乙酸盐离子交换树脂在从含有рН 2.2–2.6。在苯乙烯基体上合成的 Puromet MTS9300 树脂在吸收铁 (III) 的能力方面超过了在丙烯酸酯基体上合成的树脂 Puromet S991。通过含有 184 g L ^–1 Al ₂ (SO ₄ ) ₃的溶液2.9 g L ^–1铁 (III) 和 рН 2.3 通过填充有 Puromet MTS9300 树脂的柱子，可将铁 (III) 杂质深度去除，残留浓度不高于 0.002 g L ^–1。使用 1 M 硫酸溶液，铁 (III) 几乎可以从树脂中完全解吸。