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首页> 外文期刊>Journal of Applied Polymer Science >Use of sodium alginate biopolymer as an extracting agent of methylene blue in the polymer-enhanced ultrafiltration technique
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Use of sodium alginate biopolymer as an extracting agent of methylene blue in the polymer-enhanced ultrafiltration technique

机译：使用藻酸钠生物聚合物作为聚合物增强超滤技术中亚甲基蓝的提取剂

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摘要

In this study, the removal of methylene blue (MB) cationic dye from an aqueous solution was investigated using the polymer-enhanced ultrafiltration (PEUF) technique with sodium alginate (SA) as an extracting soluble polymer, in combination with an ultrafiltration membrane of regenerated cellulose with a 10 kDa molar mass cut-off. SA was characterized via Fourier-transform infrared spectroscopy and thermogravimetric analysis. For ultrafiltration studies, the washing method was used to evaluate various experimental variables, such as the pH, SA dose and initial MB concentration, and adsorption isotherms to identify the optimal adsorption conditions. Finally, the regeneration of the SA polymer was evaluated in five consecutive cycles of adsorption-desorption of MB. In the obtained characterization results, the structural composition of SA and the characteristic thermal stability of the polymer were verified. The PEUF results demonstrated that a retention capacity of 98% of the MB was realized at pH 8.0 using 0.025 g of SA at an initial optimal MB concentration of 50 mg L-1. It is possible to observe that the Freundlich model better explain the interaction between the dye and the polymer surface. According to the results is demonstrated the regeneration capacity of the polymer and its subsequent reuse.
机译：在这项研究中，使用聚合物增强超滤（PEUF）技术，以海藻酸钠（SA）为萃取可溶性聚合物，结合摩尔质量截止值为10 kDa的再生纤维素超滤膜，研究了亚甲基蓝（MB）阳离子染料从水溶液中的去除。通过傅里叶变换红外光谱和热重分析对SA进行了表征。对于超滤研究，使用洗涤法评估各种实验变量，如pH、SA剂量和初始MB浓度，以及吸附等温线，以确定最佳吸附条件。最后，在MB的五个连续吸附-解吸循环中评估SA聚合物的再生。在获得的表征结果中，验证了SA的结构组成和聚合物的特征热稳定性。PEUF结果表明，在pH值为8.0时，在初始最佳MB浓度为50 mg L-1时，使用0.025 g SA可实现98%的MB保留容量。可以观察到，Freundlich模型更好地解释了染料和聚合物表面之间的相互作用。根据研究结果，证明了聚合物的再生能力及其随后的再利用。

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