Magnetic biochar derived from macroalgal Sargassum hemiphyllum for highly efficient adsorption of Cu(II): Influencing factors and reusability. (October 2022)

• Record Type: Journal Article
• Authors: Truong, Quoc-Minh; Ho, Phung-Ngoc-Thao; Nguyen, Thanh-Binh; Chen, Wei-Hsin; Bui, Xuan-Thanh; Kumar Patel, Anil; Rani Singhania, Reeta; Chen, Chiu-Wen; Dong, Cheng-Di
• Is Part Of: Bioresource technology. Volume 361(2022)
• Publication Date: 2022-10
• Subjects: Algae -- Magnetic biochar -- Cu (II) -- Iron oxide -- Adsorption; 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.2022.127732
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: Magnetic biochar derived brown algae were produced by pyrolysis. Fe-BAB exhibited high Cu (II) adsorption capacity (105.3 mg g −1 ). Multi-adsorption mechanisms were responsible for Cu adsorption on Fe-BAB. The Fe-BAB can be gathered by a magnet and recycled for several uses. Abstract: In this study, the brown algae Sargassum Hemiphyllum was used as a carbon source for synthesis of magnetic porous biochar via pyrolyzing at high temperature and and doping iron oxide particles (Fe-BAB). Cu (II) species were removed from aqueous solutions using Fe-BAB under various conditions. Fe-BAB demonstrated superior Cu (II) adsorption (105.3 mg g −1 ) compared to other biochars. On the surface of Fe-BAB, there are several oxygen-containing functional groups, such as –COOH and –OH, which are likely responsible for the excellent heavy metal removal performance. By utilizing magnet, the Fe-BAB can be conveniently separated from the solution and ready for further usage. Multi-adsorption mechanisms were responsible for Cu adsorption on Fe-BAB. Using the magnetic algal biochar for heavy metal removal is feasible due to its high adsorption efficiency and simplicity of separation.