Biodegradable taro stem cellulose aerogel: A simple approach for adsorbing microplastics and dyestuffs contaminants

文献类型： 外文期刊

第一作者： Qiu, Wei-peng

作者： Qiu, Wei-peng;Su, Hai-ze;Su, Hao;Li, Na;Lai, Li-shan;Zhu, Jia-le;Xu, Zhen-lin;Wang, Hong;Wen, Peng;Hu, Teng-gen;Zhao, Ya-li;Wen, Peng

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关键词： Biomass aerogel; Taro stem microcrystalline cellulose; Microplastics and dyes; Adsorption mechanism

期刊名称：JOURNAL OF COLLOID AND INTERFACE SCIENCE （ 影响因子：9.7； 五年影响因子：8.9 ）

ISSN： 0021-9797

年卷期： 2025 年 679 卷

页码：

收录情况： SCI

摘要： Water pollution and agricultural waste are pressing global issues. Herein, a biomass aerogel derived from waste taro stem microcrystalline cellulose (TS-MCC) was fabricated, in which, the effects of cellulose amount, crosslinker content, pre-freezing protocols on the aerogel's property were studied. The optimized TS-MCC2.0 aerogel exhibited a hierarchical porous structure with good mechanical property (65.04 kPa) and adsorption capacities, with the qm towards microplastics (Polystyrene, PS) and dye (Congo red, CR) being 418.6 mg/g and 951.51 mg/g at 298 K, respectively. Meanwhile, it exhibited good applicability under different pH (3-11) and ionic strength environments, as well as the retained notably simultaneous adsorption ability even under mixed contaminant systems. The mathematical models suggested that the adsorption of PS and CR both fitted pseudosecond-order kinetics, and the adsorption isotherms could be described by the Langmuir and Freundlich models, respectively. Hydrogen bonding, electrostatic attraction, and pi-pi interactions were inferred as the main adsorption mechanisms towards PS and CR according to Fourier transform infrared spectrometer and X-ray photoelectron spectroscopy analysis. Moreover, the adsorption efficiencies were 92.37 % for PS and 88.34 % for CR after 5 reuse cycles. Therefore, this study provides a green aerogel sorbent for adsorbing microplastics and dyes contaminants.

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