Abstract

Condensed products are obtained via the partial oxidation of iron(II) cations using potassium permanganate, and their physicochemical properties are studied. Samples obtained at a potassium permanganate-to-iron(II) molar ratio close to stoichiometric in a preparation of magnetite have the greatest relative magnetic susceptibility. It is shown that the initial rate of formation of relative magnetic susceptibility in the range of 30–70°C depends linearly on the inverse thermodynamic temperature. Sedimentation of the synthesized products upon exposure to an external magnetic field is complete within 1–1.5 min. Diffractometry shows that crystalline magnetite samples form at a KMnO₄ : Fe(II) molar ratio of 0.08–0.18. Magnetic granulometry reveals they have superparamagnetic properties. Under conditions of static sorption, the degree of extraction of chromate ions is 98.7%.

中文翻译：

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铁（II）阳离子与高锰酸根离子相互作用的缩合产物的理化性质

摘要

通过高锰酸钾对铁（II）阳离子进行部分氧化得到缩合产物，并对其理化性质进行了研究。在磁铁矿制备中，高锰酸钾与铁（II）的摩尔比接近化学计量比的样品具有最大的相对磁化率。结果表明，在30–70°C范围内，相对磁化率的初始形成速率线性依赖于逆热力学温度。暴露于外部磁场后，合成产物的沉淀在1–1.5分钟内完成。衍射表明结晶磁铁矿样品在KMnO ₄处形成：Fe（II）的摩尔比为0.08-0.18。磁粒度仪显示它们具有超顺磁性。在静态吸附条件下，铬酸根离子的提取率为98.7％。