拜耳循环母液中钒的选择性吸附性能及机理

Selective adsorption performance and mechanism of vanadium in Bayer recirculating mother liquor

摘要: 通过对阴离子交换树脂筛选，选择树脂D201对拜耳循环母液中钒的选择性吸附性能及机理进行研究。在树脂D201用量为3 g/L、搅拌速率为550 r/min、温度为30 ℃、吸附时间为30 min条件下，树脂D201的吸附率达到29.48%，吸附容量为11.5 mg/g。吸附动力学和吸附等温线结果表明，吸附过程符合准二级动力学模型，吸附等温线符合Freundlich等温线模型。对比分析空白树脂和负载树脂的红外光谱，结果表明，树脂D201可以从拜耳循环母液中选择性吸附钒。

Abstract: By screening anion exchange resins, this paper selected resin D201 to study the selective adsorption performance and mechanism of vanadium in Bayer recirculating mother liquor. Under the conditions of a resin D201 dosage of 3 g/L, stirring rate of 550 r/min, temperature of 30 ℃, and adsorption time of 30 min, the adsorption rate of resin D201 reached 29.48%, and the adsorption capacity was 11.5 mg/g. The adsorption kinetics and adsorption isotherm results showed that the adsorption process conformed to the pseudosecond-order kinetic model, and the adsorption isotherm conformed to the Freundlich isotherm model. Infrared spectroscopy comparative analysis of blank resin and loaded resin showed that resin D201 could selectively adsorb vanadium from Bayer recirculating mother liquor.