| Title： |
Preparation of organic potassium salts modified microalgae biochar and its high-efficient removal of tetracycline hydrochloride from water: Activation mechanism and adsorption mechanism |
| First author： |
Xian, Bo; Tang, Wei; Xiang, Dongfang; Rao, Chenyang; Liu, Xiaying; Fang, Fang; Chu, Fuhao; Fang, Tao |
| Journal： |
JOURNAL OF WATER PROCESS ENGINEERING |
| Years： |
2024 |
| Volume / issue： |
/ |
| DOI： |
10.1016/j.jwpe.2024.106122 |
| Abstract： |
In this study, Microcystis aeruginosa was effectively transformed into high-surface-area biochar using four different organic potassium salts as activators, achieving a maximum specific surface area of 2933 m(2)g(-1). The resulting biochar exhibited an outstanding adsorption capacity for tetracycline hydrochloride, reaching up to 969.9 mgg(-1). Our findings reveal that a higher potassium content in the precursor correlates with an increased surface area of the biochar, while lower self-carbonization temperatures or higher melting points of the organic potassium salts promote a greater proportion of mesopores. Hydrogen bonding was identified as the primary adsorption mechanism, with density functional theory providing further insights into its significant role. This research presents a controllable, efficient, and environmentally friendly strategy for biochar activation and offers a predictive framework for optimizing biochar properties through organic potassium salt modification, laying a solid theoretical foundation for the design of advanced adsorbents with enhanced performance. |
