Abstract

Sorption of Sr(II) from aqueous solutions has been studied using fabricated lithium magnesium boron silicate (LMBS) sorbent. LMBS sorbent has been fabricated by the co-precipitation technique and characterized using different analytical tools like ATR, SEM, TGA, DTA, and XRD. The sorption studies applied on Sr(II) include the effect of shaking time, ionic strength, pH, and temperature. The sorption of Sr(II) is dependent on pH and ionic strength. Reaction kinetics follows the pseudo-2^nd-order model, and thermodynamics are endothermic and spontaneous. The saturation capacity of sorbent calcined at temperatures 50, 200, 400, and 600°C has been found to be 144.1, 134.5, 130.3, and 113.0 mg g^–1, respectively. Desorption studies have revealed that HCl is the optimum eluent for full recovery of Sr(II) ions (about 96.8%). Finally, according to column data, Sr(II) can be loaded and recovered from aqueous solutions using different concentrations of HCl eluent. The investigation has proved that LMBS is a suitable sorbent material for the recovery of Sr(II) from liquid waste.

中文翻译：

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使用人造无机吸附剂对水介质中锶离子的保留行为和动态吸附

摘要

使用制备的硼硅酸锂镁 (LMBS) 吸附剂研究了水溶液中 Sr(II) 的吸附。LMBS 吸附剂采用共沉淀技术制造，并使用不同的分析工具（如 ATR、SEM、TGA、DTA 和 XRD）进行表征。对 Sr(II) 的吸附研究包括振荡时间、离子强度、pH 值和温度的影响。Sr(II) 的吸附取决于 pH 值和离子强度。反应动力学遵循伪二阶^模型，热力学是吸热且自发的。在 50、200、400 和 600°C 温度下煅烧的吸附剂的饱和容量分别为 144.1、134.5、130.3 和 113.0 mg g ^–1。解吸研究表明，HCl 是完全回收 Sr(II) 离子（约 96.8%）的最佳洗脱液。最后，根据色谱柱数据，可以使用不同浓度的 HCl 洗脱液从水溶液中加载并回收 Sr(II)。研究证明LMBS是一种适合从废液中回收Sr(II)的吸附剂材料。