UV/persulfate preoxidation to improve coagulation efficiency of Microcystis aeruginosa

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

doi:10.1016/j.jhazmat.2016.10.017

UV/persulfate preoxidation to improve coagulation efficiency of Microcystis aeruginosa

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

Sanitary Engineering

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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 language	English
Pages (from-to)	508-515
Number of pages	8
Journal	Journal of Hazardous Materials
Volume	322
Issue number	Part B
DOIs	https://doi.org/10.1016/j.jhazmat.2016.10.017
Publication status	Published - 2016

Keywords

Microcystis aeruginosa
Ultraviolet/persulfate

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10.1016/j.jhazmat.2016.10.017

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title = "UV/persulfate preoxidation to improve coagulation efficiency of Microcystis aeruginosa",

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∗",

keywords = "Microcystis aeruginosa, Ultraviolet/persulfate",

author = "Yiqun Chen and Pengchao Xie and Zongping Wang and Ran Shang and Songlin Wang",

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language = "English",

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T1 - UV/persulfate preoxidation to improve coagulation efficiency of Microcystis aeruginosa

AU - Chen, Yiqun

AU - Xie, Pengchao

AU - Wang, Zongping

AU - Shang, Ran

AU - Wang, Songlin

PY - 2016

Y1 - 2016

N2 - 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∗

AB - 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∗

KW - Microcystis aeruginosa

KW - Ultraviolet/persulfate

U2 - 10.1016/j.jhazmat.2016.10.017

DO - 10.1016/j.jhazmat.2016.10.017

M3 - Article

SN - 0304-3894

VL - 322

SP - 508

EP - 515

JO - Journal of Hazardous Materials

JF - Journal of Hazardous Materials

IS - Part B

ER -

UV/persulfate preoxidation to improve coagulation efficiency of Microcystis aeruginosa

Abstract

Keywords

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