Biodegradable taro stem cellulose aerogel: A simple approach for adsorbing microplastics and dyestuffs contaminants
文献类型： 外文期刊
作者： Qiu, Wei-peng 1 ; Su, Hai-ze 1 ; Hu, Teng-gen 2 ; Su, Hao 1 ; Li, Na 1 ; Lai, Li-shan 1 ; Zhu, Jia-le 1 ; Zhao, Ya-li 3 ; Xu, Zhen-lin 1 ; Wang, Hong 1 ; Wen, Peng 1 ;
作者机构： 1.South China Agr Univ, Coll Food Sci, Guangdong Prov Key Lab Food Qual & Safety, Guangzhou 510642, Peoples R China
2.Guangdong Acad Agr Sci, Sericultural Agrifood Res Inst, Key Lab Funct Foods, Guangdong Key Lab Agr Prod Proc,Minist Agr & Rural, Guangzhou 510610, Peoples R China
3.Guizhou Acad Testing & Anal, Guiyang 550000, Peoples R China
4.Lingnan Modern Agr Sci & Technol Guangdong Prov La, Heyuan 517000, Peoples R China
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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