The immobilization of lanthanide (III) cations on the Purolite A-400, a cross-linked polymer containing –R 4 N + groups, was investigated. This type of polymers theoretically cannot retain metal cations from solutions. We assume that cations sorption on this polymer takes place due to the formation of jarosite mineral–type compounds. By increasing the temperature in the range of 0–60 °C, the cations sorption increases slightly but in the pH range of 2–6, it increases more considerable in the following order: La 3+ ˂ Nd 3+ ˂ Eu 3+ ≈ Er 3+ . The sorption at 21 and 50 °C is adequately described by the pseudo-first-order (PFO) kinetic model, and the limiting step of the rate which decreases in order Er 3+ ˃ Eu 3+ ˃ Nd 3+ ˃ La 3+ is internal diffusion. Graphical abstract

中文翻译：

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镧系元素 (III) 阳离子在含有季铵氮的聚合物上的固定化：温度和 pH 值的影响，工艺动力学

研究了镧系元素 (III) 阳离子在 Purolite A-400（一种含有 –R 4 N + 基团的交联聚合物）上的固定化。这种类型的聚合物理论上不能保留溶液中的金属阳离子。我们假设该聚合物上的阳离子吸附是由于黄钾铁矾矿物型化合物的形成而发生的。通过在 0–60 °C 范围内升高温度，阳离子吸附量略有增加，但在 pH 值范围 2–6 内，吸附量增加幅度更大，顺序如下： La 3+ ˂ Nd 3+ ˂ Eu 3+ ≈呃 3+ 。21°C 和 50°C 下的吸附由伪一级 (PFO) 动力学模型以及按顺序降低的速率的限制步骤 Er 3+ ˃ Eu 3+ ˃ Nd 3+ ˃ La 3+ 充分描述是内部扩散。图形概要