Immediate and Long-Term Impacts of Potassium Permanganate on Photosynthetic Activity, Survival and Microcystin-LR Release Risk of Microcystis Aeruginosa

Authors

Huase Ou, Tongji UniversityFollow
Naiyun Gao, Tongji UniversityFollow
Chaohai Wei, South China University of Technology
Yang Deng, Montclair State UniversityFollow
Junlian Qiao, Tongji University

Document Type

Article

Publication Date

6-15-2012

Journal / Book Title

Journal of Hazardous Materials

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.

DOI

10.1016/j.jhazmat.2012.04.006

MSU Digital Commons Citation

Ou, Huase; Gao, Naiyun; Wei, Chaohai; Deng, Yang; and Qiao, Junlian, "Immediate and Long-Term Impacts of Potassium Permanganate on Photosynthetic Activity, Survival and Microcystin-LR Release Risk of Microcystis Aeruginosa" (2012). Department of Earth and Environmental Studies Faculty Scholarship and Creative Works. 347.
https://digitalcommons.montclair.edu/earth-environ-studies-facpubs/347

Published Citation

Ou, H., Gao, N., Wei, C., Deng, Y., & Qiao, J. (2012). Immediate and long-term impacts of potassium permanganate on photosynthetic activity, survival and microcystin-LR release risk of Microcystis aeruginosa. Journal of hazardous materials, 219-220, 267–275. https://doi.org/10.1016/j.jhazmat.2012.04.006