文献类型：期刊文献

英文题名：Porous carbon derived from molten salt thermal treatment of rice husk with ultrahigh adsorption capacity for tetracycline removal from solution: An experimental and theoretical study

作者：Huang, Yongda[1,2];Zhang, Haojie[2];Hu, Hongyun[1,2];Ren, Yang[2];Lin, Zhong[3];Yu, Shuaijie[2];He, Jing[2];Li, Shuai[2];Xu, Sihua[2];Yao, Hong[2]

机构：[1]Res Inst Huazhong Univ Sci & Technol Shenzhen, Shenzhen 518000, Peoples R China;[2]Huazhong Univ Sci & Technol, Sch Energy & Power Engn, State Key Lab Coal Combust, Wuhan 430074, Peoples R China;[3]Guangdong Ocean Univ, Fac Chem & Environm Sci, Zhanjiang 524088, Peoples R China

年份：2026

卷号：14

期号：1

外文期刊名：JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING

收录：SCI-EXPANDED(收录号：WOS:001663791100001)、、EI(收录号：20260419953571)、Scopus(收录号：2-s2.0-105027936908)、WOS

基金：The work was supported by the Shenzhen Fundamental Research Program (JCYJ20220818103609020) , National Natural Science Foun-dation of China (41977125) , Natural Science Foundation of Guangdong Province (2023A1515012225) , and Special Funds for Guiding Local Scientific and Technological Development by the Central Government of China (2024CSA088) . The authors also gratefully acknowledge the assistance of Analytic and Testing Center of Huazhong University of Science and Technology for the experimental measurements.

语种：英文

外文关键词：Tetracycline adsorption; Porous carbon; Molten salt thermal treatment; Microporous structure; Surface hydroxyl group; Adsorption mechanism

外文摘要：Tetracycline (TC) residue in aquatic environments poses severe risks to public health and ecosystems. Adsorption has emerged as a promising method for TC removal from aqueous solution to alleviate its adverse effects. Porous carbon-based adsorbents derived from rice husk, have gained substantial attention because of its renewable nature and high adsorption performance. To further reduce production cost and enhance adsorption performance, an innovative molten salt thermal activation method was proposed to fabricate molten salt porous carbon (MSPC). The results showed that NaOH-Na2CO3 molten salt not only etched carbonaceous components but also reacted with silica in rice husk, by which hierarchical porous structure and surface hydroxyl groups were constructed. MSPC with developed microporous structure (SMicro = 2340 m2/g and VMicro = 0.979 cm3/g) and high content of surface hydroxyl groups, exhibited ultrahigh TC adsorption capacity (2222.3 mg/g), outperforming most reported carbon-based adsorbents. The adsorption process followed the Avrami kinetic and Freundlich isotherm models, indicating multilayer adsorption on a heterogeneous surface. Comprehensive characterization and molecular-scale theoretical calculation confirmed that TC adsorption was dominantly by physical adsorption mechanism. The MSPC effectively immobilized TC through micropore filling, hydrogen bonding, electrostatic attraction and it-it stacking interactions, where the developed microporous structure and the synergistic interaction between surface hydroxyl groups significantly enhanced TC adsorption. These findings demonstrate molten salt thermal treatment method as a sustainable strategy of converting biomass wastes into highperformance adsorbents for antibiotic wastewater treatment.