Nitrogen-doped activated carbon derived from biomass waste for effective removal of doxycycline from aqueous solution: characterization and adsorption mechanism

IF 2.5 4区材料科学 Q2 CHEMISTRY, APPLIED

Journal of Porous Materials Pub Date : 2024-04-10 DOI:10.1007/s10934-024-01612-w

Qingyun Li, Ningjie Liang, Weihua Zou, Xiuli Han, Chun Chang, Junying Chen

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Abstract

The nitrogen-doped activated carbon (NAC) with high specific area (3140.76 m²·g^− 1) derived from pomelo peel was prepared using hydrothermal carbonization, nitrogen doping and KOH activation method for the effective removal of Doxycycline (DOX) from aqueous solution. NAC showed exceptional adsorption efficacy for DOX than non-doped activated carbon (AC), which was attributed to the rich N-containing functional groups on the NAC surface and well-developed pore structure. The adsorption equilibrium data of DOX on NAC was fitted well to the Sips isotherm model and the adsorption process was spontaneous, endothermic and randomness-increasing. The Elovich kinetic model could better describe the adsorption process of DOX. The adsorption mechanisms of DOX onto NAC could be attributed to the hydrogen bonding, π-π electron donor-acceptor (EDA) interaction, hydrophobic effect and electrostatic interaction. Besides, the N-doping enhanced the adsorption performance of NAC. The maximum saturated adsorption capacity of NAC was 1559.35 mg·g^− 1 at 298 K, indicating that the NAC could be a promising adsorbent for removing Doxycycline from wastewater.

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从生物质废弃物中提取的掺氮活性炭用于从水溶液中有效去除强力霉素：表征和吸附机理

采用水热碳化、氮掺杂和KOH活化法制备了柚子皮掺氮活性炭（NAC），该活性炭具有较高的比表面积（3140.76 m2-g- 1），可有效去除水溶液中的强力霉素（DOX）。NAC对DOX的吸附效果优于未掺杂的活性炭（AC），这归因于NAC表面丰富的含氮化合物官能团和发达的孔隙结构。DOX 在 NAC 上的吸附平衡数据与 Sips 等温线模型拟合良好，吸附过程是自发的、内热的和随机性增加的。Elovich 动力学模型能更好地描述 DOX 的吸附过程。DOX在NAC上的吸附机理可归结为氢键、π-π电子供体-受体（EDA）相互作用、疏水效应和静电作用。此外，N-掺杂增强了 NAC 的吸附性能。在 298 K 条件下，NAC 的最大饱和吸附容量为 1559.35 mg-g- 1，表明 NAC 是一种很有前途的去除废水中强力霉素的吸附剂。

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来源期刊

Journal of Porous Materials 工程技术-材料科学：综合

CiteScore

4.80

自引率

7.70%

发文量

203

审稿时长

2.6 months

期刊介绍： The Journal of Porous Materials is an interdisciplinary and international periodical devoted to all types of porous materials. Its aim is the rapid publication of high quality, peer-reviewed papers focused on the synthesis, processing, characterization and property evaluation of all porous materials. The objective is to establish a unique journal that will serve as a principal means of communication for the growing interdisciplinary field of porous materials. Porous materials include microporous materials with 50 nm pores. Examples of microporous materials are natural and synthetic molecular sieves, cationic and anionic clays, pillared clays, tobermorites, pillared Zr and Ti phosphates, spherosilicates, carbons, porous polymers, xerogels, etc. Mesoporous materials include synthetic molecular sieves, xerogels, aerogels, glasses, glass ceramics, porous polymers, etc.; while macroporous materials include ceramics, glass ceramics, porous polymers, aerogels, cement, etc. The porous materials can be crystalline, semicrystalline or noncrystalline, or combinations thereof. They can also be either organic, inorganic, or their composites. The overall objective of the journal is the establishment of one main forum covering the basic and applied aspects of all porous materials.