Modification of Haematococcus pluvialis algal residue by ionic liquid for improved extraction of astaxanthin followed by removal of acid red dye in water

Wei Liu, Fangong Kong, Jing Zhang, Qin Wu, Shuhao Huo, Pengfei Cheng, Qing Li, Qingfeng Chen, Kirk Cobb, Roger Ruan

Research output: Contribution to journalReview articlepeer-review

4 Scopus citations

Abstract

Microalgal residue is an ideal adsorbent for the removal of pollutants in water. Residue modification is effective in improving its adsorption efficiency, while also achieving further extraction of active substances. In this study, ionic liquid was used to extract astaxanthin from the Haematococcus pluvialis residue, and also reprocessed residue was used as an efficient adsorbent for the removal of acid red 88 dye in water. The combination of ionic liquid and solvent of ethanol + soybean oil(1:1)treatment achieved the highest astaxanthin extraction efficiency. Microscopic properties of the algal residue were clearly improved and the average pore size of the residue decreased dramatically from 43.11 nm to 5.23 nm after modification. The maximum removal efficiency of acid red dye by the residue, increased to 99% from 85% after modification. This study provides a new method for the improved extraction of astaxanthin from the Haematococcus pluvialis residue, and modification of the residue, to be further used as an adsorbent.

Original languageEnglish (US)
Article number102656
JournalAlgal Research
Volume64
DOIs
StatePublished - May 2022

Bibliographical note

Funding Information:
This work was supported in part by the Foundation (No. ZZ20190118 ) of State Key Laboratory of Bio-based Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences ; Major Science and Technology Innovation Projects in Shandong Province ( 2019JZZY010723 ); Pilot Project of Integrating Science, Education and Industry with Innovation, Qilu University of Technology ( Shandong Academy of Science ) ( 2020KJC-ZD13 ); National Natural Science Foundation of China ( 21978120 ); and the Key R&D projects in Jiangsu Province ( BE2020405 ). University of Minnesota MnDrive Environment Program MNE12 ; and University of Minnesota Center for Biorefining .

Funding Information:
This work was supported in part by the Foundation (No. ZZ20190118) of State Key Laboratory of Bio-based Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences; Major Science and Technology Innovation Projects in Shandong Province (2019JZZY010723); Pilot Project of Integrating Science, Education and Industry with Innovation, Qilu University of Technology (Shandong Academy of Science) (2020KJC-ZD13); National Natural Science Foundation of China (21978120); and the Key R&D projects in Jiangsu Province (BE2020405). University of Minnesota MnDrive Environment Program MNE12; and University of Minnesota Center for Biorefining.

Publisher Copyright:
© 2022

Keywords

  • Adsorbent
  • Haematococcus pluvialis
  • Ionic liquid
  • Modification
  • Residue

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