Harvesting oleagious microalgae using magnetic flocculation by Fe3O4@amino-methylated plant polyphenol

被引：0
作者：
Zhao Y. [1 ]
Wang X. [1 ]
Liu L. [1 ]
Liang W. [1 ]
机构：
[1] College of Environmental Science & Engineering, Beijing Forestry University, Beijing Key Lab for Source Control Technology of Water Pollution, Beijing
来源：
Liang, Wenyan (lwy@bjfu.edu.cn) | 1600年 / Beijing University of Aeronautics and Astronautics (BUAA)卷 / 34期
关键词：
Algae; Amine-methylation; Flocculation; Magnetite; Plant polyphenol; Seperation;
D O I：
10.13801/j.cnki.fhclxb.20160317.003
中图分类号：
学科分类号：
摘要：
The plant polyphenol was modified by amine methylation, and then coated onto Fe3O4 surface to obtain the functional Fe3O4@amine-methylated plant polyphenol (Fe3O4@A-PP) for harvesting the oleagious microalgae-Chlorella vulgaris. FTIR, magnetic hysteresis loop, and zeta potential of Fe3O4@A-PP were detected to investigate its physicochemical properties. The effects of dosing mode of Fe3O4@A-PP and the ratio of Fe3O4 to A-PP on harvesting efficiency were also studied. FTIR indicates that Fe3O4@A-PP has the functional groups of C-H, N-H, and -OH from A-PP. The coating of A-PP onto the Fe3O4 surface don't interfere the magnetic property of Fe3O4. Compared with A-PP, the zeta potential of Fe3O4@A-PP is improved by 5-10 mV. The ratio of Fe3O4 (g/L) to A-PP (mg/L) in Fe3O4@A-PP influences the harvesting efficiency obviously and the highest efficiency of 84.2% is achieved at 20/200. Fe3O4@A-PP can shorten the harvesting time from 30 min of A-PP to less than 0.5 min. The microscope images show that the microalgae cells are wrapped by Fe3O4@A-PP and form the cluster matrix or adhere around the Fe3O4, unlike the flaky and loose flocs or aggregates after A-PP flocculation. The mechanism of charge neutralization in the Fe3O4@A-PP magnetic flocculation plays an important role in microalgal harvesting. © 2017, Chinese Society for Composite Materials. All right reserved.
引用
收藏
页码：121 / 128
页数：7
相关论文
共 20 条
  • [1] Hoh D., Waston S., Kan E., Algal biofilm reactors for integrated wastewater treatment and biofuel production: a review, Chemical Engineering Journal, 287, 7, pp. 466-473, (2016)
  • [2] Grima E.M., Belarbi E.H., Fernandez F.A., Et al., Recovery of microalgal biomass and metabolites: process options and economics, Biotechnology Advances, 20, 7, pp. 491-515, (2003)
  • [3] Wang S.K., Wang F., Hu Y.R., Et al., Magnetic flocculant for high efficiency harvesting of microalgal cells, ACS Applied Materials & Interfaces, 6, 1, pp. 109-115, (2014)
  • [4] Prochazkova G., Podolova N., Safarik I., Et al., Physicochemical approach to freshwater microalgae harvesting with magnetic particles, Colloids and Surfaces B: Biointerfaces, 112, 2, pp. 213-218, (2013)
  • [5] Lu F.Q., Li X.P., Sun W., Study on naphthenic acid sodium waste water treatment by flocculation magnetic separation technology, Environmental Science and Management, 36, 9, pp. 104-107, (2011)
  • [6] Lim J.K., Chieh D.C., Jalak S.A., Et al., Rapid magnetophoretic separation of microalgae, Small, 8, 11, pp. 1683-1692, (2012)
  • [7] Zhao Y., Liang W.Y., Liu L.J., Et al., Harvesting Chlorella vulgaris by magnetic flocculation using Fe<sub>3</sub>O<sub>4</sub> coating with polyaluminium chloride and polyacrylamide, Bioresource Technolgy, 198, 8, pp. 789-796, (2015)
  • [8] Ge S.J., Agbakpe M., Wu Z.Y., Et al., Influences of surface coating, UV irradiation and magnetic field on the algae removal using magnetite nanoparticles, Environmental Science & Technology, 49, 2, pp. 1190-1196, (2015)
  • [9] Lee K., Lee S.Y., Na J.G., Et al., Magnetophoretic harvesting of oleaginous Chlorella sp. by using biocompatible chitosan/magnetic nanoparticle composites, Bioresource Technology, 149, 9, pp. 575-578, (2013)
  • [10] Vandamme D., Foubert I., Muylaert K., Flocculation as a low-cost method for harvesting microalgae for bulk biomass production, Trends in Biotechnology, 31, 4, pp. 233-239, (2013)
12