CREATION A SORPTION MATERIAL FOR THE EXTRACTION OF METAL IONS FROM AQUEOUS SOLUTIONS

N. Zhunusbekova, Т.К. Iskakova, N. Chinibayeva, G. Kussainova, N. Khudaibergenov
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Abstract

The presence of a three-dimensional hydrophilic network structure ensures the uniqueness and wide practical application of hydrogels in industry, medicine, agriculture, etc. On their basis, soft contact lenses, dressings, superabsorbents, catalysts, soil structuring agents, preventing root drying and improving plant survival, have been created. The aimof this work is to synthesize new water-swellable polymer composites by combining monomer units of various natures based on acrylic acid and agar-agar with imidazole, differing in hydrophilic-hydrophobic balance. Results and discussion: The synthesis of new double and ternary polymer composites based on acrylic acid and agar-agar with imidazole was carried out, their physicochemical and complex-forming properties with transition metal ions in an aqueous medium were investigated. Comparative analysis showed that the complexation of interpenetrating networks with FeCl3 is more pronounced than with CoCl2. This fact can be associated with the difficulty of introducing a cobalt ion into the ligand plane during the formation of a metal complex, which further affects the binding to the functional groups of the network. The specific binding of the obtained polymer composites with metal salts was shown, which is carried out through the formation of ion pairs with the participation of counterions and coordination-unsaturated metals, which make the main contribution to the formation of extracomplexes and are responsible for the coordination of oxygen-containing ligands.
制造一种从水溶液中提取金属离子的吸附材料
三维亲水网络结构的存在保证了水凝胶在工业、医药、农业等领域的独特性和广泛的实际应用。在他们的基础上,软性隐形眼镜,敷料,高吸水性,催化剂,土壤结构剂,防止根干燥和提高植物存活率,已经被创造出来。本研究的目的是将不同性质的丙烯酸和琼脂单体单元与咪唑结合,合成新的可水膨胀的聚合物复合材料,其亲疏水平衡不同。结果与讨论:合成了以丙烯酸、琼脂和咪唑为基料的新型双、三元聚合物复合材料,研究了其在水介质中与过渡金属离子的物理化学和络合形成性能。对比分析表明,FeCl3对互穿网络的络合作用比CoCl2更明显。这一事实可能与在金属配合物形成过程中难以将钴离子引入配体平面有关,这进一步影响了与网络官能团的结合。所得聚合物复合材料与金属盐的特异性结合是通过离子对的形成和配位-不饱和金属的参与进行的,它们是形成外配合物的主要因素,并负责含氧配体的配位。
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