Highly dispersed iron-doped biochar derived from sawdust for Fenton-like degradation of toxic dyes. (15th May 2021)

• Record Type: Journal Article
• Authors: Wang, Chongqing; Sun, Ruirui; Huang, Rong
• Is Part Of: Journal of cleaner production. Volume 297(2021)
• Publication Date: 2021-05-15
• Subjects: Fenton-like degradation -- Iron-doped biochar -- Wastewater treatment -- Refractory organic contaminants -- Hydroxyl radicals; Factory and trade waste -- Management -- Periodicals; Manufactures -- Environmental aspects -- Periodicals; Déchets industriels -- Gestion -- Périodiques; Usines -- Aspect de l'environnement -- Périodiques; 628.5
• DOI: 10.1016/j.jclepro.2021.126681
• Languages: English
• ISSNs: 0959-6526

Abstract

Abstract: Wastewater pollution is a global challenge in the field of environmental remediation. Functional biochar as Fenton-like catalyst receives growing attention for degradation of refractory organic contaminants in wastewater. This work provides a step-forward to develop effective functional biochar via revealing the mechanism of surface catalysis. The synthesis of iron-doped biochar (Fe@BC) was conducted through iron impregnation and carbonization of waste sawdust. Highly dispersed iron species on graphitic biochar is verified by multi-techniques including electron probe microanalyzer, transmission electron microscope, X-ray powder diffraction, X-ray photoelectron spectroscopy, Fourier transform infrared spectrum and Raman spectrum. Rhodamine B (RhB) degradation above 92.7% is obtained within 140 min. Surface catalysis for generating hydroxyl radical is proved by iron determination, radical identification, and catalyst characterizations. Effective degradation of binary dyes is achieved. Fe@BC is an excellent catalyst with broad operation pH and highly stability. Promising application of the functional biochar provides a sustainable and ecofriendly strategy for wastewater treatment. Graphical abstract: Image 1 Highlights: Functional biochar was synthesized as sustainable Fenton-like catalyst. Highly dispersed iron-doped graphitic biochar is verified by multi-techniques. The catalyst is excellent due to good activity, broad work pH, high stability. Fenton-like reactions for RhB degradation are dominated by surface catalysis.