Effects of ozone and peroxone on algal separation via dispersed air flotation

Truc Linh Nguyen, D. J. Lee, Jo-Shu Chang, J. C. Liu

研究成果: Article同行評審

28 引文 斯高帕斯(Scopus)

摘要

Effects of pre-oxidation on algal separation by dispersed air flotation were examined. Ozone (O3) and peroxone (O3 and H2O2) could induce cell lysis, release of intracellular organic matter (IOM), and mineralization of organic substances. Separation efficiency of algal cells improved when pre-oxidized. Total of 76.4% algal cells was separated at 40mg/L of N-cetyl-N-N-N-trimethylammonium bromide (CTAB), while 95% were separated after 30-min ozonation. Pre-oxidation by ozone and peroxone also enhanced flotation separation efficiency of dissolved organic carbon (DOC), polysaccharide, and protein, in which peroxone process exerted more significantly than O3. Two main mechanisms were involved in flotation separation of unoxidized algal suspension, namely hydrophobic cell surface and cell flocculation resulting from CTAB adsorption. However, flocculation by CTAB was hindered for pre-oxidized algal suspensions. It implied that the compositional changes in extracellular organic matter (EOM) by pre-oxidation were more determined for flotation separation of pre-oxidized cells.

原文English
頁(從 - 到)246-250
頁數5
期刊Colloids and Surfaces B: Biointerfaces
105
DOIs
出版狀態Published - 2013 五月 1

All Science Journal Classification (ASJC) codes

  • 生物技術
  • 表面和介面
  • 物理與理論化學
  • 膠體和表面化學

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