Alkali-modified hydrothermal carbon-La@D composite with adjustable surface characteristics for efficient adsorption of Tetracycline

文献类型： 外文期刊

第一作者： Dai, Nan

作者： Dai, Nan;Yu, Tingting;Zhang, Yuxin;Chen, Fangzheng;Song, Dan;Wang, Song;Zhang, Kai;Liu, Xiaoying;Dong, Wenxin;Li, Hong

作者机构：

关键词： Carbon modified Laponite @Diatomite; KOH; Tetracycline; Adsorption

期刊名称：JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING （ 影响因子：7.2； 五年影响因子：7.6 ）

ISSN： 2213-2929

年卷期： 2024 年 12 卷 6 期

页码：

收录情况： SCI

摘要： The abuse of tetracycline has led to the destruction of the ecological environment. In this research, Carbon modified Laponite @Diatomite (C-La@D) samples were synthesized by hydrothermal method, and were modified with KOH to further improve their adsorption performance for tetracycline (TC). The results showed that the carbon material and KOH modification endow the clay material with abundant functional groups, reducing the average pore size of the composite material. The composite (4KC-La@D) exhibited optimal adsorption performance when the activation time of KOH was 4 h. The adsorption capacities of TC and methylene blue (MB) were up to 251 mg/g and 1721 mg/g within 90 min, and the composite had good adaptability at pH = 3-9. The pseudo-second-order kinetic model and the sips isotherm model accurately described the adsorption process. The mechanism indicated that electrostatic attraction, hydrogen bonding and it-it interactions were the main driving forces for adsorption. Coexisting ions slightly affects adsorption properties of the composite material, and the loss of adsorption capacity did not exceed 5 %. After 5 reusability cycles, the adsorption capacity of TC was still 165 mg/g. Moreover, the adsorption process of the composite material was fitted based on machine learning theory, and the statistics revealed that the random forest model had a better fitting ability (R-2>0.9) for the adsorption data than the artificial neural network. In brief, this work highlights the potential of alkali-modified carbon-La@D composite for rapid adsorption of tetracycline and resistance to environmental interference.

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