Institute of Chemical Industry of Forest Products, CAF, Key Lab. of Biomass Energy and Material, Jiangsu Province, National Engineering Research Center of Low-Carbon Processing and Utilization of Forest Biomass, Key Lab. of Chemical Engineering of Forest Products, National Forestry and Grassland Administration, Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing 210042, China.
Institute of Chemical Industry of Forest Products, CAF, Key Lab. of Biomass Energy and Material, Jiangsu Province, National Engineering Research Center of Low-Carbon Processing and Utilization of Forest Biomass, Key Lab. of Chemical Engineering of Forest Products, National Forestry and Grassland Administration, Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing 210042, China.
Int J Biol Macromol. 2024 Nov;280(Pt 2):135881. doi: 10.1016/j.ijbiomac.2024.135881. Epub 2024 Sep 23.
Adsorbent materials constructed from natural macromolecular products are favored because of their wide range of sources, biodegradability, and environmental friendliness. Salecan is a novel extracellular polysaccharide with ideal physicochemical and biological activities. Here, we have designed a polymer gel through UV-initiated polymerization of [2-(Methacryloyloxy) ethyl] dimethyl-(3-sulfopropyl) ammonium hydroxide (SBMA) in the mixture of salecan and tannic acid. Photopatterned polymerization process allowed in situ formation of gel adsorbent in a mild reaction condition with energy-efficient manner. Batch experiments for toluidine blue (TB) adsorption were carried out as a function of initial dye concentration, solution pH, contact time, and gel dosage to examine the adsorption capacity, potential mechanism, and removal efficiency. Adsorption behavior exhibited a pH-dependence pattern, which was closely related to their swelling and morphological properties. Adsorption process was in conformity to pseudo-second-order kinetic and Langmuir isotherm models, unlocking a chemical adsorption behavior and monolayer-type removal. The maximum adsorption was 490.2 mg/g, which could be considered a superiorly competing value. Additionally, the UV-gel still showed desirable recyclability and maintained the adsorption effectiveness over 95 % after five regeneration cycles. This study opened up new prospects in preparing high performance adsorbent for TB decontamination and laid the foundation for polysaccharide-based adsorption material research.
由天然高分子产物构建的吸附材料因其来源广泛、可生物降解和环境友好而受到青睐。沙菜聚糖是一种新型的胞外多糖，具有理想的物理化学和生物活性。在这里，我们通过在沙菜聚糖和单宁酸的混合物中引发[2-(甲基丙烯酰氧)乙基]二甲基-(3-磺丙基)氢氧化铵(SBMA)的 UV 聚合反应设计了一种聚合物凝胶。光图案化聚合过程允许在温和的反应条件下原位形成凝胶吸附剂，以节能的方式进行。作为初始染料浓度、溶液 pH 值、接触时间和凝胶剂量的函数，进行了甲苯胺蓝 (TB) 吸附的批实验，以研究吸附容量、潜在机制和去除效率。吸附行为表现出 pH 依赖性模式，这与它们的溶胀和形态特性密切相关。吸附过程符合拟二级动力学和 Langmuir 等温线模型，揭示了化学吸附行为和单层类型的去除。最大吸附量为 490.2mg/g，这可以被认为是一个具有竞争力的数值。此外，UV 凝胶在五次再生循环后仍表现出良好的可回收性，并保持了 95%以上的吸附效果。本研究为 TB 去污制备高性能吸附剂开辟了新的前景，并为多糖基吸附材料的研究奠定了基础。
