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

Quoc-Minh Truong; Phung-Ngoc-Thao Ho; Thanh-Binh Nguyen; Wei-Hsin Chen; Xuan-Thanh Bui; Anil Kumar Patel; Reeta Rani Singhania; Chiu-Wen Chen; Cheng-Di Dong

doi:10.1016/j.biortech.2022.127732

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

Bioresour Technol. 2022 Oct:361:127732. doi: 10.1016/j.biortech.2022.127732. Epub 2022 Aug 4.

Authors

Quoc-Minh Truong¹, Phung-Ngoc-Thao Ho², Thanh-Binh Nguyen², Wei-Hsin Chen³, Xuan-Thanh Bui⁴, Anil Kumar Patel⁵, Reeta Rani Singhania⁵, Chiu-Wen Chen⁵, Cheng-Di Dong⁶

Affiliations

¹ Institute of Aquatic Science and Technology, National Kaohsiung University of Science and Technology, Kaohsiung City 81157, Taiwan; Faculty of Management Science, Thu Dau Mot University, Binh Duong 75000, Viet Nam.
² Institute of Aquatic Science and Technology, National Kaohsiung University of Science and Technology, Kaohsiung City 81157, Taiwan.
³ Department of Aeronautics and Astronautics, National Cheng Kung University, Tainan 701, Taiwan; Research Center for Smart Sustainable Circular Economy, Tunghai University, Taichung 407, Taiwan; Department of Mechanical Engineering, National Chin-Yi University of Technology, Taichung 411, Taiwan.
⁴ Key Laboratory of Advanced Waste Treatment Technology, Ho Chi Minh City University of Technology (HCMUT), Vietnam National University Ho Chi Minh (VNU-HCM), Thu Duc City, Ho Chi Minh City 700000, Viet Nam; Faculty of Environment and Natural Resources, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City 700000, Viet Nam.
⁵ Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung City 81157, Taiwan.
⁶ Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung City 81157, Taiwan. Electronic address: cddong@nkust.edu.tw.

PMID: 35934247
DOI: 10.1016/j.biortech.2022.127732

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.

Keywords: Adsorption; Algae; Cu (II); Iron oxide; Magnetic biochar.

MeSH terms

Adsorption
Charcoal
Magnetic Phenomena
Metals, Heavy*
Sargassum*
Water Pollutants, Chemical* / analysis

Substances

Metals, Heavy
Water Pollutants, Chemical
biochar
Charcoal