UV/persulfate preoxidation to improve coagulation efficiency of Microcystis aeruginosa

Journal article (2016)

Authors

Yiqun Chen Huazhong University of Science and Technology, Key Laboratory of Water and Wastewater Treatment
Pengchao Xie Key Laboratory of Water and Wastewater Treatment, Huazhong University of Science and Technology
Zongping Wang Huazhong University of Science and Technology, Key Laboratory of Water and Wastewater Treatment
R. Shang Huazhong University of Science and Technology, Sanitary Engineering - CEG
Songlin Wang Huazhong University of Science and Technology, Key Laboratory of Water and Wastewater Treatment
Research Group
Sanitary Engineering (CEG) (TU Delft)
Copyright: © 2016 Yiqun Chen, Pengchao Xie, Zongping Wang, R. Shang, Songlin Wang
DOI: https://doi.org/10.1016/j.jhazmat.2016.10.017
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Published Date

2016

Language

English

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Faculty

Civil Engineering & Geosciences

Department

Water Management

Research Group

Sanitary Engineering

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∗

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