Podkościelna Beata, Wawrzkiewicz Monika, Klapiszewski Łukasz
Department of Polymer Chemistry, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Skłodowska University, M. Curie-Skłodowska Sq.3., PL-20031 Lublin, Poland.
Department of Inorganic Chemistry, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Skłodowska University, M. Curie-Skłodowska Sq.3., PL-20031 Lublin, Poland.
Polymers (Basel). 2021 Nov 27;13(23):4139. doi: 10.3390/polym13234139.
Water pollution by toxic substances, such as azo dyes, is a serious environmental problem that needs to be addressed. This study presents the synthesis and characterization of new polymeric sorbents, based on the epoxy resin Epidian 5 (Ep5), as a potential adsorbent for the removal of the toxic azo dye C.I. Acid Violet 1 (AV1). Triethylenetetramine (TETA) was applied as a cross-linking agent in the amounts of 1 g (6.67 wt %), 1.5 g (10 wt %), and 2 g (13.33 wt %). The use of a compound with amino groups allows for the simultaneous functionalization of the obtained material. The reaction was carried out in an environment of ethylene glycol, with the addition of a porophore solvent (toluene) and bis(2-ethylhexyl)sulfosuccinate sodium salt (S). The attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR) revealed the existence of a strong band in the 828-826 cm range corresponding to the second-order amine group, which indicates their incorporation into the epoxy structure. The glass transition and decomposition temperatures of the resins decreased with the increasing amounts of amine in the material. The thermogravimetry (TGA) analysis demonstrated that all products are thermally stable up to 340 °C. The surface morphology and microstructural properties of the obtained sorbents were determined using scanning electron microscopy (SEM) images and showed an irregular star shape, with dimensions ranging from 400 to 1000 µm. The adsorption capacities of Ep5-TETA1, Ep5-TETA1.5, Ep5-TETA2 and Ep5-TETA1.5 + S for AV1 evaluated during batch experiments were found to be 2.92, 3.76, 7.90 and 3.30 mg/g, respectively.
诸如偶氮染料等有毒物质造成的水污染是一个亟待解决的严重环境问题。本研究介绍了基于环氧树脂Epidian 5（Ep5）的新型聚合物吸附剂的合成与表征，该吸附剂可作为去除有毒偶氮染料C.I.酸性紫1（AV1）的潜在吸附剂。三乙烯四胺（TETA）用作交联剂，用量分别为1 g（6.67 wt%）、1.5 g（10 wt%）和2 g（13.33 wt%）。使用含氨基的化合物可使所得材料同时功能化。反应在乙二醇环境中进行，并添加了致孔剂溶剂（甲苯）和双（2-乙基己基）磺基琥珀酸钠盐（S）。衰减全反射傅里叶变换红外光谱（ATR-FTIR）显示在828 - 826 cm范围内存在一个对应于二级胺基团的强吸收带，这表明它们已掺入环氧结构中。树脂的玻璃化转变温度和分解温度随材料中胺含量的增加而降低。热重分析（TGA）表明所有产物在高达340°C时都是热稳定的。使用扫描电子显微镜（SEM）图像确定了所得吸附剂的表面形态和微观结构性质，结果显示为不规则星形，尺寸范围为400至1000 µm。在批量实验中评估的Ep5-TETA1、Ep5-TETA1.5、Ep5-TETA2和Ep5-TETA1.5 + S对AV1的吸附容量分别为2.92、3.76、7.90和3.30 mg/g。
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