Abstract Sunset yellow (SY) removal in the beverages and pharmaceutical preparations is of great importance due to its negative side effects. In this context, a new and efficient adsorbent, PDMAEMA grafted PS-DVB-VBC microspheres were synthesized and applied for the adsorption of SY dye. The morphology, chemical and physical properties of the proposed adsorbent was fully characterized using scanning electron microscopy (SEM), thermal gravimetric analysis (TGA), Fourier-transform infrared spectroscopy (FTIR), elemental and Brunauer–Emmett–Teller (BET) surface area analysis. The adsorption performance of the adsorbent was investigated systematically, including the influence of pH, contact time, adsorbent dose, adsorption isotherms, adsorption kinetics, and reusability. The optimized conditions of the SY towards the sorbent were as follows: pH of 2.0, contact time of 40.0 minutes, adsorbent dose 0.4 g L-1 at 25°C. The equilibrium adsorption process followed the Langmuir isotherm model with a maximum adsorption capacity of 312.5 mg g-1 Pseudo-second-order kinetic model was found to be most appropriate to define the sorption of SY dye onto the adsorbent. The quantitative results (96.3-102.1%) obtained for the real samples (beverages, pharmaceutical preparation and synthetic waste water) confirmed the high performance, feasibility and efficacy of the novel method. The uptake of SY dye was high (>90%) even after recycling five times indicating that the adsorbent could be regenerated and reused in practical applications.

中文翻译：

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PDMAEMA 接枝微球作为有效吸附剂去除药物制剂、饮料和废水中的日落黄

摘要 由于其副作用，在饮料和药物制剂中去除日落黄 (SY) 具有重要意义。在此背景下，合成了一种新型高效吸附剂 PDMAEMA 接枝 PS-DVB-VBC 微球，并将其应用于 SY 染料的吸附。使用扫描电子显微镜 (SEM)、热重分析 (TGA)、傅里叶变换红外光谱 (FTIR)、元素和布鲁诺-埃米特-特勒 (BET) 表面积对所提出的吸附剂的形态、化学和物理性质进行了全面表征分析。系统研究了吸附剂的吸附性能，包括pH值、接触时间、吸附剂剂量、吸附等温线、吸附动力学和可重复使用性的影响。SY 对吸附剂的优化条件如下：pH 2.0，40.0 分钟的接触时间，25°C 下的吸附剂量为 0.4 g L-1。平衡吸附过程遵循 Langmuir 等温线模型，最大吸附容量为 312.5 mg g-1。发现伪二级动力学模型最适合定义 SY 染料在吸附剂上的吸附。实际样品（饮料、药物制剂和合成废水）的定量结果（96.3-102.1%）证实了该新方法的高性能、可行性和有效性。SY染料的吸收率很高（> 90％），即使在循环使用五次后，表明吸附剂可以再生并在实际应用中重复使用。发现 5 mg g-1 伪二级动力学模型最适合定义 SY 染料在吸附剂上的吸附。实际样品（饮料、药物制剂和合成废水）的定量结果（96.3-102.1%）证实了该新方法的高性能、可行性和有效性。SY染料的吸收率很高（> 90％），即使在循环使用五次后，表明吸附剂可以再生并在实际应用中重复使用。发现 5 mg g-1 伪二级动力学模型最适合定义 SY 染料在吸附剂上的吸附。实际样品（饮料、药物制剂和合成废水）的定量结果（96.3-102.1%）证实了该新方法的高性能、可行性和有效性。SY染料的吸收率很高（> 90％），即使在循环使用五次后，表明吸附剂可以再生并在实际应用中重复使用。