Microalgae-enhanced bioremediation of Cr(VI) ions using spent coffee ground-derived magnetic biochar MoS2–Ag composites
- Authors
- Ly, Nguyen Hoang; Khoa, Nguyen Le Minh; Nguyen, Nguyen Binh; Huong, Vu Thi; Van Duc, Bui; Aminabhavi, Tejraj M.; Vasseghian, Yasser; Joob, Sang-Woo
- Issue Date
- Dec-2023
- Publisher
- ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
- Keywords
- MoS2-Ag; Biochar; Cr(VI) ions; Microalgae; Bioremediation
- Citation
- JOURNAL OF ENVIRONMENTAL MANAGEMENT, v.348
- Journal Title
- JOURNAL OF ENVIRONMENTAL MANAGEMENT
- Volume
- 348
- URI
- https://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/49115
- DOI
- 10.1016/j.jenvman.2023.119259
- ISSN
- 0301-4797
1095-8630
- Abstract
- Composites of magnetic biochar derived from spent coffee grounds were prepared using MoS2 decorated by plasmonic silver nanoparticles (MoS2-Ag), which were used for the bioremediation Cr6+ ions. The composites were characterized by electron microscopy, X-ray diffraction, Raman, and UV-VIS spectroscopy. The bioremediation of Cr6+ ions was enhanced almost two times compared to microalgae, Spirulina maxima. Such an increased activity is attributed to heterojunction formation of Biochar@MoS2-Ag composite due to the synergetic effects of surface plasmon resonance of AgNPs inducing amplified local electric field, thus simultaneously increasing the absorption of MoS2 under visible or near-infrared light. The combination of Biochar@MoS2-Ag and Spirulina maxima powder was effective for the separation (microalga-based absorption and accumulation of Cr6+ ions) of photo-induced carriers (composite-assisted to breakdown Cr6+ ions). This study offers efficient ecofriendly treatment of Cr6+ ions by reporting the first enhanced bioremediation of Cr(VI) ions by microalgae using MoS2-Ag-modified biochar obtained from consumed coffee grounds.
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