Efficient adsorption of dyes from aqueous solution using a novel functionalized magnetic biochar: Synthesis, kinetics, isotherms, adsorption mechanism, and reusability

作者：Li, Xiumin; Xu, Jinlan^*; Luo, Xianxin^*; Shi, Jingxin

来源：Bioresource Technology, 2022, 360: 127526.

DOI：10.1016/j.biortech.2022.127526

• RhodamineB
• Adsorptionmechanism
• Dyeingwastewater
• Dodecylbenzenesulfonicacid

In this study, a novel adsorbent, dodecylbenzene sulfonic acid (DBSA) functionalized magnetic biochar (DBSAFe3O4@BC), was synthesized and used to efficiently remove dyes from aqueous solution. The results indicated that DBSA-Fe3O4@BC exhibited an excellent adsorption capacity for Rhodamine B (RhB), and the maximum adsorption capacity for RhB at 298 K was 367.67 mg/g, which was approximately 2.3-1.2 folds than that of BC, dodecylsulfonic acid functionalized biochar (DSA@BC), DBSA@BC, Fe3O4@BC, and DSA-Fe3O4@BC. The possible adsorption mechanisms for RhB adsorption by DBSA-Fe3O4@BC included pore filling, electrostatic attraction, H bond, and surface complexation. Importantly, structural control presented that the simultaneous introduction of alkyl and phenyl groups significantly enhanced RhB adsorption by DBSA-Fe3O4@BC through hydrophobic and 7C-7C interaction. Combined ethanol (EtOH) desorption and H2O2 oxidation regeneration, DBSA

• 单位
  南昌航空大学