UV/persulfate preoxidation to improve coagulation efficiency of Microcystis aeruginosa

Yiqun Chen, Pengchao Xie, Zongping Wang, Ran Shang, Songlin Wang

Research output: Contribution to journalArticleScientificpeer-review

37 Citations (Scopus)
55 Downloads (Pure)

Abstract

The performance of UV-activated persulfate (UV/PS) technology as preoxidation process to enhanceMicrocystis aeruginosa removal by subsequent coagulation-sedimentation was firstly evaluated. Theresults demonstrate that UV/PS preoxidation could successfully promote coagulation of algae cellsthrough the effective neutralization of zeta potential, which was caused by the changes of cell mor-phology, size distribution and surface properties after simultaneous UV irradiation and formed reactivespecies (i.e. SO4•−and HO•) oxidation. Since excessive oxidation would cause cell rupture along withthe release of organics, which could deteriorate coagulation efficiency, optimal PS dose (60 mg/L) andUV dose (375 mJ/cm2) were proposed to exist in this study. The concentrations of extracellular algal∗
Original languageEnglish
Pages (from-to)508-515
Number of pages8
JournalJournal of Hazardous Materials
Volume322
Issue numberPart B
DOIs
Publication statusPublished - 2016

Keywords

  • Microcystis aeruginosa
  • Ultraviolet/persulfate

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