Permeabilization of Haematococcus pluvialis and solid-liquid extraction of astaxanthin by CO2-based alkyl carbamate ionic liquids
文献类型： 外文期刊
作者： Khoo, Kuan Shiong 1 ; Ooi, Chien Wei 3 ; Chew, Kit Wayne 4 ; Foo, Su Chern 5 ; Lim, Jun Wei 6 ; Tao, Yang 7 ; Jiang, N 1 ;
作者机构： 1.Harbin Inst Technol, Sch Environm, State Key Lab Urban Water Resource & Environm, Harbin 150090, Peoples R China
2.Univ Nottingham Malaysia, Fac Sci & Engn, Dept Chem & Environm Engn, Jalan Broga, Semenyih 43500, Selangor Darul, Malaysia
3.Monash Univ Malaysia, Sch Engn, Chem Engn Discipline, Jalan Lagoon Selatan, Bandar Sunway 47500, Selangor Darul, Malaysia
4.Xiamen Univ Malaysia, Sch Energy & Chem Engn, Jalan Sunsuria, Sepang 43900, Selangor, Malaysia
5.Monash Univ Malaysia, Sch Sci, Jalan Lagoon Selatan, Bandar Sunway 47500, Selangor Darul, Malaysia
6.Univ Teknol PETRONAS, Inst Selfsustainable Bldg, HICoE Ctr Biofuel & Biochem Res, Dept Fundamental & Appl Sci, Seri Iskandar 32610, Perak Darul Rid, Malaysia
7.Nanjing Agr Univ, Coll Food Sci & Technol, Nanjing 210095, Jiangsu, Peoples R China
8.Jiangsu Acad Agr Sci, Inst Agroprod Proc, Nanjing 210014, Jiangsu, Peoples R China
关键词： Ionic liquids; Dialkyl carbamate; Astaxanthin; Haematococcus pluvialis; Extraction; CO2
期刊名称：CHEMICAL ENGINEERING JOURNAL （ 影响因子：13.273； 五年影响因子：11.529 ）
ISSN： 1385-8947
年卷期： 2021 年 411 卷
页码：
收录情况： SCI
摘要： Haematococcus pluvialis (H. pluvialis) microalgae are well known for their high content of astaxanthin, which is a super potent antioxidant with various remedial effects. Ionic liquids (ILs) have been proposed as a promising solvent to permeabilize the robust microalgal cell wall for an effective extraction of bioactive compounds. Nonetheless, the removal of ILs from the extracted compounds requires the additional treatment steps that complicate the overall extraction process and the recycling of ILs. To address these shortcomings, we demonstrated a sustainable extraction system that utilizes CO2-based alkyl carbamate ILs to permeate H. pluvialis cells and extract astaxanthin. This class of ILs is readily distillable for an easy recovery of ILs from the extraction medium. Among the tested CO2-based alkyl carbamate ILs [dimethylammonium dimethylcarbamate (DIMCARB), dipropylammonium dipropylcarbamate (DPCARB), dibutylammonium dibutylcarbamate (DBCARB) and diallyammonium diallycarbamate (DACARB)], DIMCARB gave the best performance of astaxanthin extraction. The optimized extraction conditions [100% (w/w) of DIMCARB, 75 min and 45 degrees C] resulted in the high yield of astaxanthin (27.99 mg/g). The capability of DIMCARB to permeabilize the amorphous trilayered structure of cell wall was verified by the presence of pores on the cell surface of H. pluvialis as shown in the microscope images. The performance and recyclability of DIMCARB extraction system were also evaluated by conducting three successive rounds of astaxanthin extraction with the recycled DIMCARB solutions. In addition, the antioxidant capacity of the extracted astaxanthin was well retained, showing that this type of distillable IL was suitable for the extraction of phytonutrients from algal source.
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