Microalgae as an Effective Recovery Agent for Vanadium in Aquatic Environment

Hee Su Kim, Minsik Kim, Won-Kun Park, Won-Geun Yang, Manoranjan Nayak, Hyeon Ho Shin, Kichul Cho, Daekyung Kim and Tatsuya Oda
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Hee Su Kim: Daegu Center, Korea Basic Science Institute (KBSI), 80 Daehak-ro, Daegu 41566, Korea
Minsik Kim: Cell Factory Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahak-ro, Daejeon 34141, Korea
Won-Kun Park: Department of Chemistry and Energy Engineering, Sangmyung University, 20 Hongimun 2-gil, Jongno-gu, Seoul 03016, Korea
Won-Geun Yang: Daegu Center, Korea Basic Science Institute (KBSI), 80 Daehak-ro, Daegu 41566, Korea
Manoranjan Nayak: Biorefinery and Bioenergy Research Laboratory, Amity Institute of Biotechnology, Amity University Uttar Pradesh, Noida 201313, India
Hyeon Ho Shin: Library of Marine Samples, Korea Institute of Ocean Science & Technology, Geoje 53201, Korea
Kichul Cho: Department of Applied Marine Bioresource Science, National Marine Biodiversity Institute of Korea (MABIK), Seocheon-gun 33662, Korea
Daekyung Kim: Daegu Center, Korea Basic Science Institute (KBSI), 80 Daehak-ro, Daegu 41566, Korea
Tatsuya Oda: School of Fisheries Science & Environmental Studies, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan

Energies, 2022, vol. 15, issue 12, 1-11

Abstract: Given that vanadium is a valuable material, the implementation of vanadium recycling processes is thus necessary to enhance the element’s value chain as well as minimize its undesirable environmental consequences. Among various remediation methods available, a biological method based on microalgal adsorption is known to be eco-friendly and calls for further investigations. Herein, we evaluated V 2 O 5 adsorption efficiencies of four different microalgal strains: Nannochloropsis oculata , Heterocapsa circularisquama , Chattonella marina , and Chattonella antiqua . Inductively coupled plasma mass spectrometry (ICP-MS) data indicated that vanadium concentration in the culture medium of Nannochloropsis oculata was reduced from 4.61 ± 0.11 mg L −1 to 1.85 ± 0.21 mg L −1 after being exposed to V 2 O 5 solution for 24 h, whereas the supernatants of the other three strains displayed no change in vanadium ion concentration. Therefore, our results indicated a strong potential of Nannochloropsis oculata for recycling vanadium with approximately 59.9% of vanadium ion removal efficiency. Furthermore, morphological observation of Nannochloropsis oculata using scanning electron microscopy (SEM) indicated that the cells were able to maintain their intact morphology even under the presence of high concentrations of heavy metals. Due to the high adsorption efficiency and robustness of Nannochloropsis oculata , the results collectively support it as a potential strain for V 2 O 5 recovery.

Keywords: Nannochloropsis oculata; vanadium oxide; adsorption; ICP-MS; SEM (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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