摘要
This study examines galactoglucomannan, a well-studied biopolymer isolated from Siberian spruce (Picea obovata Ledeb). Due to its structure, abundant with hydroxyl groups, galactoglucomannan’s properties, such as heavy-metal ion affinity, are considered to be mediocre. Nevertheless, there are various ways to enhance its functionality via oxidative TEMPO/NaBr/NaOCl processing. This work is concerned with the determination of the oxidation effect on the structure and performance properties, such as thermal decomposition behavior, antioxidant activity, and selective heavy-metal sorption. In the results, TEMPO-oxidized galactoglucomannan yields vary in the range of 78.3 ± 6.4 wt.%. The carboxylate group in the oxidized derivative represents up to 0.084 g/1 g of the sample. According to antioxidant activity tests, the oxidized galactoglucomannan exceeds the initial sample in terms of hydroxyl radical scavenging ability. The spectral characteristics of the initial and oxidized galactoglucomannan samples reveal the differences in absorption units (1725, 1610, and 1371 cm−1). The preservation of the polymeric structure was confirmed by the gel permeation chromatography analysis results. The heavy-metal ion capacity of galactoglucomannan is higher for the oxidized derivative, which demonstrated Cd2+, Fe2+, Cu2+, and Pb2+ adsorption values of 166.8 mg/g, 142.8 mg/g, 150.0 mg/g, and 199.2 mg/g, accordingly. The obtained result of the competitive heavy-metal ion adsorption of oxidized galactoglucomannan also exceeds its initial form, as characterized by its summary 143.1 mg/g capacity.
摘要译文
这项研究检查了半乳葡聚糖，这是一种从西伯利亚云杉（Picea obovata Ledeb）分离出的精心研究的生物聚合物。由于其结构，羟基丰富，甲乳核葡聚糖的特性（例如重金属亲和力）被认为是中等的。然而，有多种方法可以通过氧化节奏/NABR/NAOCL处理来增强其功能。这项工作与确定氧化作用对结构和性能特性的确定有关，例如热分解行为，抗氧化活性和选择性重量金属吸附。在结果中，温度氧化的半乳糖珠团体的产生在78.3±6.4 wt。％范围内变化。氧化衍生物中的羧酸酯基代表样品的0.084 g/1 g。根据抗氧化活性测试，就羟基自由基清除能力而言，氧化的半乳糖葡萄糖量超过了初始样品。初始和氧化的半乳糖葡萄糖样品的光谱特征揭示了吸收单元的差异（1725、1610和1371 cm -1）。通过凝胶渗透色谱分析结果证实了聚合结构的保存。对于氧化的衍生物，半乳葡萄糖的重金离子容量较高，该衍生物表现出166.8 mg/g，142.8 mg/g，142.8 mg/g，150.0 mg/g，以及199.2 mg/g，以及199.2 mg/g/g，表现出CD2+，Fe2+，Cu2+和PB2+吸附值。氧化半乳糖葡萄糖的竞争重金属离子吸附的结果也超过了其初始形式，其特征在于其汇总143.1 mg/g的容量。
Vladislav A. Ionin (https://orcid.org/0000-0002-6896-7352) [1];Yuriy N. Malyar (https://orcid.org/0000-0001-9380-0290) [2];Valentina S. Borovkova (https://orcid.org/0000-0002-9090-4710) [3];Dmitriy V. Zimonin [4];Aleksandr S. Kazachenko [5];. TEMPO-Oxidized Spruce Galactoglucomannan–Biopolymer with Enhanced Antioxidant Activity and Selective Heavy-Metal Sorption[J]. Antioxidants, 2025,14(5): 569