A novel electrochemical modification combined with one-step pyrolysis for preparation of sustainable thorn-like iron-based biochar composites. (February 2019)

• Record Type: Journal Article
• Authors: Yang, Fan; Zhang, Shuaishuai; Sun, Yuqing; Du, Qing; Song, Jingpeng; Tsang, Daniel C.W.
• Is Part Of: Bioresource technology. Volume 274(2019)
• Page Start: 379
• Page End: 385
• Publication Date: 2019-02
• Subjects: Engineered biochar -- Iron-biochar composites -- Waste valorization -- Lead removal/remediation -- Wastewater treatment; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2018.10.042
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: Magnetic EC-Fe3 O4 /BC exhibited outstanding Pb removal capacity. EC modification promoted dispersion of Fe3 O4 nanoparticles on biochar. Oxygen-containing functional groups were intensified. Surface interactions involved coordination, adsorption, and reduction. Abstract: A novel method incorporating electrochemical (EC) modification and one-step pyrolysis is developed to prepare sustainable Fe3 O4 -based magnetic adsorbent (EC-Fe3 O4 /BC) via pyrolysis of FeCl3 -pretreated corn straw-derived biochar under an electric field generated by graphite electrode. Morphological characterization revealed a uniform dispersion of rod-like crystalline Fe3 O4 nanoparticles in the inner and outer structure of biochar. The EC modification also introduced more oxygen-containing functional groups, which contributed to an outstanding Pb adsorption capacity (113 mg g −1 ) and fast kinetics (0.054 g mg −1 h −1 ). Therefore, the EC modification is a simple and time-saving method to effectively fabricate magnetic biochar adsorbent for high-performance wastewater treatment.