Electrochemical inactivation of Microcystis aeruginosa using BDD electrodes: Kinetic modeling of microcystins release and degradation

Shiqing Zhou; Lingjun Bu; Zhou Shi; Lin Deng; Shumin Zhu; Naiyun Gao

doi:10.1016/j.jhazmat.2017.12.023

Electrochemical inactivation of Microcystis aeruginosa using BDD electrodes: Kinetic modeling of microcystins release and degradation

J Hazard Mater. 2018 Mar 15:346:73-81. doi: 10.1016/j.jhazmat.2017.12.023. Epub 2017 Dec 9.

Authors

Shiqing Zhou¹, Lingjun Bu², Zhou Shi³, Lin Deng⁴, Shumin Zhu⁵, Naiyun Gao⁵

Affiliations

¹ Department of Water Engineering and Science, College of Civil Engineering, Key Laboratory of Building Safety and Energy Efﬁciency, Ministry of Education, Hunan University, Changsha, Hunan, 410082, PR China; School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332, United States. Electronic address: shiqingzhouwater@163.com.
² Department of Water Engineering and Science, College of Civil Engineering, Key Laboratory of Building Safety and Energy Efﬁciency, Ministry of Education, Hunan University, Changsha, Hunan, 410082, PR China.
³ Department of Water Engineering and Science, College of Civil Engineering, Key Laboratory of Building Safety and Energy Efﬁciency, Ministry of Education, Hunan University, Changsha, Hunan, 410082, PR China. Electronic address: szhou04@163.com.
⁴ Department of Water Engineering and Science, College of Civil Engineering, Key Laboratory of Building Safety and Energy Efﬁciency, Ministry of Education, Hunan University, Changsha, Hunan, 410082, PR China; School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332, United States.
⁵ State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, PR China.

PMID: 29247956
DOI: 10.1016/j.jhazmat.2017.12.023

Abstract

Electrochemical inactivation of cyanobacteria using boron-doped diamond (BDD) electrode were comprehensively investigated in this study. The pulse amplitude modulated (PAM) fluorometry, flow cytometry, and confocal laser scanning microscopy (CLSM) were used to characterize the photosynthetic capacity and cell integrity of Microcystis aeruginosa. Persulfate is in-situ generated and activated during the process and responsible for the inactivation of M. aeruginosa. The inactivation efficiency increases along with the increase of applied currents. Additionally, a kinetic model based on a sequence of two consecutive irreversible first-order processes was developed to simulate the release and degradation of microcystins (MCLR). The model was able to successfully predict the concentration of extracellular, intracellular and total MCLR under different applied currents and extended exposure time.

Keywords: Confocal laser scanning microscopy (CLSM); Electrochemical inactivation; Flow cytometry; Kinetic modeling; Microcystins.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Boron
Diamond
Electrochemical Techniques*
Electrodes
Kinetics
Microbial Viability*
Microcystins / metabolism
Microcystis* / growth & development
Microcystis* / metabolism
Models, Theoretical*
Photosynthesis

Substances

Microcystins
Diamond
Boron