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Magnetic Flocculant for High Efficiency Harvesting of Microalgal Cells
Alternative TitleACS Appl. Mater. Interfaces
Wang, Shi-Kai1,2,3; Wang, Feng1,2; Hu, Yi-Ru1,2,3; Stiles, Amanda R.4; Guo, Chen1,2; Liu, Chun-Zhao1,2
2014-01-08
Source PublicationACS APPLIED MATERIALS & INTERFACES
ISSN1944-8244
Volume6Issue:1Pages:109-115
AbstractMagnetic flocculant was synthesized for the highly efficient recovery of microalgal cells. The highest flocculation was achieved using the magnetic flocculant synthesized with iron oxide and 0.1 mg/mL cationic polyacrylamide (CPAM). This resulted in a recovery efficiency of more than 95% within 10 min using a dosage of 25 mg/L for Botryococcus braunii and 120 mg/L for Chlorella ellipsoidea. For both species, the adsorption isotherm data fit the Freundlich model better than the Langmuir model, indicating that the adsorption process was a heterogeneous multilayer. The maximum adsorption capacity was 114.8 and 21.4 mg dry cells/mg-particles at pH 7 for B. braunii and C. ellipsoidea, respectively. The primary flocculation mechanism was bridging, which was assisted by the electrostatic interactions between the microalgal cells and the magnetic flocculant under acidic conditions. These results provide new opportunities and challenges for understanding and improving the harvesting of microalgae using magnetic separation.; Magnetic flocculant was synthesized for the highly efficient recovery of microalgal cells. The highest flocculation was achieved using the magnetic flocculant synthesized with iron oxide and 0.1 mg/mL cationic polyacrylamide (CPAM). This resulted in a recovery efficiency of more than 95% within 10 min using a dosage of 25 mg/L for Botryococcus braunii and 120 mg/L for Chlorella ellipsoidea. For both species, the adsorption isotherm data fit the Freundlich model better than the Langmuir model, indicating that the adsorption process was a heterogeneous multilayer. The maximum adsorption capacity was 114.8 and 21.4 mg dry cells/mg-particles at pH 7 for B. braunii and C. ellipsoidea, respectively. The primary flocculation mechanism was bridging, which was assisted by the electrostatic interactions between the microalgal cells and the magnetic flocculant under acidic conditions. These results provide new opportunities and challenges for understanding and improving the harvesting of microalgae using magnetic separation.
KeywordMicroalgae Harvesting Cationic Polyacrylamide Magnetic Flocculant Botryococcus Braunii Chlorella Ellipsoidea
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1021/am404764n
URL查看原文
Indexed BySCI
Language英语
WOS KeywordORGANIC POLYELECTROLYTES ; WATER-TREATMENT ; HIGH-GRADIENT ; FRESH-WATER ; SEPARATION ; ADSORPTION ; REMOVAL ; BIOMASS ; POLYACRYLAMIDES ; PERFORMANCE
WOS Research AreaScience & Technology - Other Topics ; Materials Science
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS IDWOS:000329586300017
Citation statistics
Cited Times:63[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/8135
Collection研究所(批量导入)
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Natl Key Lab Biochem Engn, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Univ Calif Berkeley, Dept Plant & Microbial Biol, Berkeley, CA 94720 USA
Recommended Citation
GB/T 7714
Wang, Shi-Kai,Wang, Feng,Hu, Yi-Ru,et al. Magnetic Flocculant for High Efficiency Harvesting of Microalgal Cells[J]. ACS APPLIED MATERIALS & INTERFACES,2014,6(1):109-115.
APA Wang, Shi-Kai,Wang, Feng,Hu, Yi-Ru,Stiles, Amanda R.,Guo, Chen,&Liu, Chun-Zhao.(2014).Magnetic Flocculant for High Efficiency Harvesting of Microalgal Cells.ACS APPLIED MATERIALS & INTERFACES,6(1),109-115.
MLA Wang, Shi-Kai,et al."Magnetic Flocculant for High Efficiency Harvesting of Microalgal Cells".ACS APPLIED MATERIALS & INTERFACES 6.1(2014):109-115.
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