School of Food Science, Guangdong Pharmaceutical University, Zhongshan 528458, People's Republic of China.
School of Food Science, Guangdong Pharmaceutical University, Zhongshan 528458, People's Republic of China; GDPU-HKU Zhongshan Biomedical Innovation Platform, Zhongshan 528437, People's Republic of China.
Int J Biol Macromol. 2024 Nov;279(Pt 3):134991. doi: 10.1016/j.ijbiomac.2024.134991. Epub 2024 Aug 26.
In this study, bacterial cellulose (BC) and BC/locust bean gum (LBG) composite produced from banana hydrolysate were both used as the adsorbent for various organic dyes adsorption especially for malachite green (MG) adsorption for the first time. The BC/LBG(2%) composite exhibited significantly enhanced swelling rate and textural characteristics while maintained the basic structure of BC as depicted by XRD, FT-IR, and NMR, providing a foundation for its application as an excellent adsorbent. The composite exhibited a high adsorption rate and adsorption capacity for MG (exceeding 95 % and 2000 mg/g), and had a good selectivity for MG adsorption in the solution containing crystal violet (CV), rhodamine B (RB), and methyl orange (MO). The MG adsorption process conformed to multiple models including Langmuir and pseudo-first-order models. And the adsorption mechanism mainly comprised chemical adsorption (hydrogen bonding and electrostatic interactions) and physical adsorption. The reusability of BC/LBG(2%) composite was attractive for industrial application that the MG adsorption rate reduced merely a little (still higher than 88 %) after the 5 regeneration process. Overall, considering its adsorption capacity, selectivity, and reusability, BC/LBG(2%) composite prepared by in-situ fermentation with LBG addition was a competent adsorbent for MG adsorption and MG containing wastewater treatment.
在这项研究中，首次使用由香蕉水解物制备的细菌纤维素 (BC) 和 BC/槐豆胶 (LBG) 复合材料作为各种有机染料吸附剂，特别是用于孔雀石绿 (MG) 吸附。BC/LBG(2%) 复合材料表现出显著增强的溶胀率和结构特征，同时保持了 BC 的基本结构，如 XRD、FT-IR 和 NMR 所示，为其作为优异吸附剂的应用提供了基础。该复合材料对 MG 具有高吸附速率和吸附容量（超过 95%和 2000mg/g），并且在含有结晶紫 (CV)、罗丹明 B (RB) 和甲基橙 (MO) 的溶液中对 MG 吸附具有良好的选择性。MG 吸附过程符合多种模型，包括 Langmuir 和拟一级模型。吸附机制主要包括化学吸附（氢键和静电相互作用）和物理吸附。BC/LBG(2%) 复合材料的可重复使用性对工业应用具有吸引力，因为在 5 次再生过程后，MG 吸附率仅略有降低（仍高于 88%）。总体而言，考虑到其吸附容量、选择性和可重复使用性，通过原位发酵添加 LBG 制备的 BC/LBG(2%) 复合材料是一种用于 MG 吸附和 MG 含废水处理的有竞争力的吸附剂。
