Pyrolysis of marine algae for biochar production for adsorption of Ciprofloxacin from aqueous solutions

Thanh-Binh Nguyen; Quoc-Minh Truong; Chiu-Wen Chen; Wei-Hsin Chen; Cheng-Di Dong

doi:10.1016/j.biortech.2022.127043

Pyrolysis of marine algae for biochar production for adsorption of Ciprofloxacin from aqueous solutions

Bioresour Technol. 2022 May:351:127043. doi: 10.1016/j.biortech.2022.127043. Epub 2022 Mar 23.

Authors

Thanh-Binh Nguyen¹, Quoc-Minh Truong², Chiu-Wen Chen³, Wei-Hsin Chen⁴, Cheng-Di Dong⁵

Affiliations

¹ Institute of Aquatic Science and Technology, National Kaohsiung University of Science and Technology, Kaohsiung City 81157, Taiwan.
² 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, Vietnam.
³ Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung City 81157, Taiwan.
⁴ 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.
⁵ Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung City 81157, Taiwan. Electronic address: cddong@nkust.edu.tw.

PMID: 35337990
DOI: 10.1016/j.biortech.2022.127043

Abstract

Biochars derived from three species of algae was synthesized by impregnating the green algae Ulva Ohnoi, red algae Agardhiella subulata, and brown algae Sargassum hemiphyllum with ZnCl₂ chemical activator and employed as a long-term adsorbent for ciprofloxacin (CIP) removal from water. The results revealed that combination of brown algae and ZnCl₂ chemical activator (ZBAB) successfully produced mesoporous biochar with excellent physicochemical characteristics and gave the best CIP adsorption capacity. The ZBAB yielded a high CIP adsorption capacity (190-300 mg g^-1) under various parameter effects (initial pH, temperature and major ions). Throughought the surface characterization techniques, the proposed adsorption mechanisms were electrostatic interaction, π-π EDA interaction, pore filling and hydrogen bonding. Moreover, not only algal biochars exhibited innovative and potential adsorbent for rapid and effective remediate pollution from water, but combination of algal biomass and ZnCl₂ activator also created renewable source of energy from biomass pyrolysis.

Keywords: Activating agent; Adsorption; Algae-derived biochar; Antibiotic; Pyrolysis gas products.

MeSH terms

Adsorption
Charcoal / chemistry
Ciprofloxacin / chemistry
Kinetics
Pyrolysis*
Water
Water Pollutants, Chemical* / chemistry

Substances

Water Pollutants, Chemical
biochar
Water
Charcoal
Ciprofloxacin