Immediate and long-term impacts of potassium permanganate on photosynthetic activity, survival and microcystin-LR release risk of Microcystis aeruginosa

Huase Ou, Naiyun Gao, Chaohai Wei, Yang Deng, Junlian Qiao

Research output: Contribution to journalArticleResearchpeer-review

31 Citations (Scopus)

Abstract

The immediate and long-term impacts of potassium permanganate (KMnO 4 ) as pre-oxidant on Microcystis aeruginosa and microcystin-LR (MC-LR) release risk were investigated. The cell density and the integrity of M. aeruginosa were determined by a flow cytometry, and typical photosynthetic parameters were measured by a pulse amplitude modulated fluorometer. The photosynthetic parameters were reduced to different degrees, accompanied with slight cytoclasis and complete degradation of extracellular MC-LR immediately after various dosages KMnO 4 oxidation (2-20mgL -1 ). In a 6-d cultivation following 5mgL -1 KMnO 4 oxidation, the cell density decreased from 3.9×10 6 to 0.6×10 6 cellsmL -1 , and then increased to 0.9×10 6 cellsmL -1 , while the extracellular MC-LR increased from 0 to 51.2μgL -1 . In the cultivation after 10mgL -1 KMnO 4 treatment, the intracellular MC-LR and cell activity significantly declined, while significant cytoclasis (cell density from 3.8×10 6 to 0cellsmL -1 ) and MC-LR release (increase from 0 to 15.2μgL -1 ) were observed. The photosynthetic parameters were found to be useful tools to predict the recovery tendency of M. aeruginosa cells, and the MC-LR release risk should be considered during KMnO 4 pre-oxidation in water-treatment plants.

Original languageEnglish
Pages (from-to)267-275
Number of pages9
JournalJournal of Hazardous Materials
Volume219-220
DOIs
StatePublished - 15 Jun 2012

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Microcystis
Potassium Permanganate
Potassium
potassium
oxidation
Oxidation
Fluorometers
Water treatment plants
Flow cytometry
Cell Count
flow cytometry
Oxidants
oxidant
Recovery
Degradation
degradation
Water Purification
cyanoginosin LR
parameter
Flow Cytometry

Keywords

  • Cyanobacteria
  • Microcystin-LR
  • Microcystis aeruginosa
  • Photosynthesis
  • Potassium permanganate

Cite this

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title = "Immediate and long-term impacts of potassium permanganate on photosynthetic activity, survival and microcystin-LR release risk of Microcystis aeruginosa",
abstract = "The immediate and long-term impacts of potassium permanganate (KMnO 4 ) as pre-oxidant on Microcystis aeruginosa and microcystin-LR (MC-LR) release risk were investigated. The cell density and the integrity of M. aeruginosa were determined by a flow cytometry, and typical photosynthetic parameters were measured by a pulse amplitude modulated fluorometer. The photosynthetic parameters were reduced to different degrees, accompanied with slight cytoclasis and complete degradation of extracellular MC-LR immediately after various dosages KMnO 4 oxidation (2-20mgL -1 ). In a 6-d cultivation following 5mgL -1 KMnO 4 oxidation, the cell density decreased from 3.9×10 6 to 0.6×10 6 cellsmL -1 , and then increased to 0.9×10 6 cellsmL -1 , while the extracellular MC-LR increased from 0 to 51.2μgL -1 . In the cultivation after 10mgL -1 KMnO 4 treatment, the intracellular MC-LR and cell activity significantly declined, while significant cytoclasis (cell density from 3.8×10 6 to 0cellsmL -1 ) and MC-LR release (increase from 0 to 15.2μgL -1 ) were observed. The photosynthetic parameters were found to be useful tools to predict the recovery tendency of M. aeruginosa cells, and the MC-LR release risk should be considered during KMnO 4 pre-oxidation in water-treatment plants.",
keywords = "Cyanobacteria, Microcystin-LR, Microcystis aeruginosa, Photosynthesis, Potassium permanganate",
author = "Huase Ou and Naiyun Gao and Chaohai Wei and Yang Deng and Junlian Qiao",
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Immediate and long-term impacts of potassium permanganate on photosynthetic activity, survival and microcystin-LR release risk of Microcystis aeruginosa. / Ou, Huase; Gao, Naiyun; Wei, Chaohai; Deng, Yang; Qiao, Junlian.

In: Journal of Hazardous Materials, Vol. 219-220, 15.06.2012, p. 267-275.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Immediate and long-term impacts of potassium permanganate on photosynthetic activity, survival and microcystin-LR release risk of Microcystis aeruginosa

AU - Ou, Huase

AU - Gao, Naiyun

AU - Wei, Chaohai

AU - Deng, Yang

AU - Qiao, Junlian

PY - 2012/6/15

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AB - The immediate and long-term impacts of potassium permanganate (KMnO 4 ) as pre-oxidant on Microcystis aeruginosa and microcystin-LR (MC-LR) release risk were investigated. The cell density and the integrity of M. aeruginosa were determined by a flow cytometry, and typical photosynthetic parameters were measured by a pulse amplitude modulated fluorometer. The photosynthetic parameters were reduced to different degrees, accompanied with slight cytoclasis and complete degradation of extracellular MC-LR immediately after various dosages KMnO 4 oxidation (2-20mgL -1 ). In a 6-d cultivation following 5mgL -1 KMnO 4 oxidation, the cell density decreased from 3.9×10 6 to 0.6×10 6 cellsmL -1 , and then increased to 0.9×10 6 cellsmL -1 , while the extracellular MC-LR increased from 0 to 51.2μgL -1 . In the cultivation after 10mgL -1 KMnO 4 treatment, the intracellular MC-LR and cell activity significantly declined, while significant cytoclasis (cell density from 3.8×10 6 to 0cellsmL -1 ) and MC-LR release (increase from 0 to 15.2μgL -1 ) were observed. The photosynthetic parameters were found to be useful tools to predict the recovery tendency of M. aeruginosa cells, and the MC-LR release risk should be considered during KMnO 4 pre-oxidation in water-treatment plants.

KW - Cyanobacteria

KW - Microcystin-LR

KW - Microcystis aeruginosa

KW - Photosynthesis

KW - Potassium permanganate

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M3 - Article

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EP - 275

JO - Journal of Hazardous Materials

JF - Journal of Hazardous Materials

SN - 0304-3894

ER -