Efficient harvesting of green microalgae cells by magnetic flocculated Fe3O4 nanoparticles combined with chitosan

IF 2.2 2区农林科学 Q2 AGRICULTURAL ENGINEERING International Journal of Agricultural and Biological Engineering Pub Date : 2023-01-01 DOI:10.25165/j.ijabe.20231604.7809

Sifen Liu, Suping Fu, Zhongjie Wen, Xiang Wang, Tianjiu Jiang, Hongye Li

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Abstract

Microalgae harvesting remains a challenging step in microalgae industrialization, thereby provoking the necessity to explore sustainable and economically feasible approaches. This research investigated the use of magnetic flocculated nanoparticles in the harvesting of the common microalgae Chlorella pyrenoidosa and Scenedesmus obliquus. The results showed that magnetic flocculated nanoparticles efficiently adsorbed negatively charged microalgae cells, and a magnetic field could adsorb the magnetic flocculated nanoparticles, thereby harvesting the microalgae cells. Harvesting efficiency was remarkably increased at the optimum magnetic field strength of 0.5 T with the magnetic flocculated nanoparticles at 0.738 g/L, and microalgae broth at pH 9.0, whereas the recovery rates of both C. pyrenoidosa and S. obliquus were around 97% and the sedimentation speed of both was above 2.63 cm/min. This study exemplified the magnetic flocculated nanoparticles-based approach to effectively harvest the microalgae cells. Keywords: magnetic flocculated nanoparticles, Chlorella pyrenoidosa, Scenedesmus obliquus, recovery rate, sedimentation speed DOI: 10.25165/j.ijabe.20231604.7809 Citation: Liu S F, Fu S P, Wen Z J, Wang X, Jiang T J, Li H Y. Efficient harvesting of green microalgae cells by magnetic flocculated Fe3O4 nanoparticles combined with chitosan. Int J Agric & Biol Eng, 2023; 16(4): 215-221

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磁絮凝Fe3O4纳米颗粒与壳聚糖复合高效收获绿色微藻细胞

微藻收获仍然是微藻产业化的一个具有挑战性的步骤，因此有必要探索可持续和经济上可行的方法。本研究研究了磁性絮凝纳米颗粒在常见微藻小球藻(Chlorella pyrenoidosa)和斜状小球藻(Scenedesmus obliquus)收获中的应用。结果表明，磁性絮凝纳米颗粒能有效吸附带负电荷的微藻细胞，磁场可以吸附磁性絮凝纳米颗粒，从而收获微藻细胞。在最佳磁场强度为0.5 T、磁絮凝纳米颗粒浓度为0.738 g/L、微藻培养液pH为9.0的条件下，收获效率显著提高，pyrenoidosa和S. obliquus的回收率均在97%左右，沉降速度均在2.63 cm/min以上。本研究以磁性絮凝纳米颗粒为基础，实现了微藻细胞的有效收获。关键词:磁絮凝纳米颗粒，核核小球藻，斜状小球藻，回收率，沉降速度[DOI: 10.25165/ j.j ijaba .20231604.7809]引用本文:刘树峰，傅淑萍，文志军，王鑫，蒋天军，李海燕。磁絮凝Fe3O4纳米颗粒与壳聚糖复合高效收获绿色微藻细胞。农业与生物工程学报，2023;16 (4): 215 - 221

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来源期刊

International Journal of Agricultural and Biological Engineering AGRICULTURAL ENGINEERING-

CiteScore

4.30

自引率

12.50%

发文量

审稿时长

24 weeks

期刊介绍： International Journal of Agricultural and Biological Engineering (IJABE, https://www.ijabe.org) is a peer reviewed open access international journal. IJABE, started in 2008, is a joint publication co-sponsored by US-based Association of Agricultural, Biological and Food Engineers (AOCABFE) and China-based Chinese Society of Agricultural Engineering (CSAE). The ISSN 1934-6344 and eISSN 1934-6352 numbers for both print and online IJABE have been registered in US. Now, Int. J. Agric. & Biol. Eng (IJABE) is published in both online and print version by Chinese Academy of Agricultural Engineering.